{ "document": { "category": "csaf_base", "csaf_version": "2.0", "distribution": { "tlp": { "label": "WHITE" } }, "lang": "en", "notes": [ { "category": "legal_disclaimer", "text": "The Netherlands Cyber Security Center (henceforth: NCSC-NL) maintains this portal to enhance access to its information and vulnerabilities. The use of this information is subject to the following terms and conditions:\n\nThe vulnerabilities disclosed in this portal are gathered by NCSC-NL from a variety of open sources, which the user can retrieve from other platforms. NCSC-NL makes every reasonable effort to ensure that the content of this portal is kept up to date, and that it is accurate and complete. Nevertheless, NCSC-NL cannot entirely rule out the possibility of errors, and therefore cannot give any warranty in respect of its completeness, accuracy or real-time keeping up-to-date. NCSC-NL does not control nor guarantee the accuracy, relevance, timeliness or completeness of information obtained from these external sources. The vulnerabilities disclosed in this portal are intended solely for the convenience of professional parties to take appropriate measures to manage the risks posed to the cybersecurity. No rights can be derived from the information provided therein.\n\nNCSC-NL and the Kingdom of the Netherlands assume no legal liability or responsibility for any damage resulting from either the use or inability of use of the vulnerabilities disclosed in this portal. This includes damage resulting from the inaccuracy of incompleteness of the information contained in it.\nThe information on this page is subject to Dutch law. All disputes related to or arising from the use of this portal regarding the disclosure of vulnerabilities will be submitted to the competent court in The Hague. This choice of means also applies to the court in summary proceedings." } ], "publisher": { "category": "coordinator", "contact_details": "cert@ncsc.nl", "name": "National Cyber Security Centre", "namespace": "https://www.ncsc.nl/" }, "title": "CVE-2026-100353", "tracking": { "current_release_date": "2026-10-30T00:10:38.912833Z", "generator": { "date": "2026-02-17T15:00:00Z", "engine": { "name": "V.E.L.M.A", "version": "1.7" } }, "id": "CVE-2026-100353", "initial_release_date": "2026-10-15T17:36:50.915824Z", "revision_history": [ { "date": "2026-10-15T17:36:50.915824Z", "number": "1", "summary": "CVE created.| Source created.| CVE status created. (valid)| Description created for source.| CVSS created.| References created (3).| CWES updated (1)." }, { "date": "2026-10-15T17:37:00.435774Z", "number": "2", "summary": "NCSC Score created." }, { "date": "2026-10-15T20:40:08.168633Z", "number": "3", "summary": "Source created.| CVE status created. (valid)| Description created for source.| CVSS created.| References created (5).| CWES updated (1)." }, { "date": "2026-10-16T18:43:54.373521Z", "number": "4", "summary": "Source created.| CVE status created. (valid)| Description created for source.| Products connected (1)." }, { "date": "2026-10-17T00:28:19.984711Z", "number": "5", "summary": "Source created.| CVE status created. (valid)| Description created for source.| CVSS created.| Products connected (6).| Product Identifiers created (1).| References created (5).| CWES updated (1).| Vendor_assessment created." }, { "date": "2026-10-17T00:28:28.660312Z", "number": "6", "summary": "NCSC Score updated." }, { "date": "2026-10-18T00:31:38.070491Z", "number": "7", "summary": "NCSC Score updated." }, { "date": "2026-10-19T11:23:49.403619Z", "number": "8", "summary": "CVSS created.| CWES created (1).| Products created (1).| References created (4).| Description created for source.| Unknown change." }, { "date": "2026-10-19T11:23:50.976842Z", "number": "9", "summary": "NCSC Score updated." }, { "date": "2026-10-19T12:03:39.732105Z", "number": "10", "summary": "CVSS created.| CWES created (1).| Products created (13).| References created (5).| Description created for source.| Unknown change." }, { "date": "2026-10-19T12:03:43.491933Z", "number": "11", "summary": "NCSC Score updated." }, { "date": "2026-10-19T16:07:57.351751Z", "number": "12", "summary": "CVSS created.| CWES created (1).| Products created (1).| References created (3).| Description created for source.| Unknown change." }, { "date": "2026-10-19T16:08:00.505206Z", "number": "13", "summary": "NCSC Score updated." }, { "date": "2026-10-20T07:30:54.333453Z", "number": "14", "summary": "EPSS created.| Unknown change." }, { "date": "2026-10-20T07:40:15.358373Z", "number": "15", "summary": "NCSC Score updated." }, { "date": "2026-10-21T00:52:38.063156Z", "number": "16", "summary": "Source connected.| CVE status created. (valid)| Description created for source.| CVSS created.| Products connected (2).| Product Remediations created (2).| Product Identifiers created (4).| Product Identifiers removed (4).| References created (19).| CWES updated (1)." }, { "date": "2026-10-21T00:52:49.682806Z", "number": "17", "summary": "NCSC Score updated." }, { "date": "2026-10-22T13:51:44.977669Z", "number": "18", "summary": "Source connected.| CVE status created. (valid)| Description created for source.| CVSS created.| Products connected (2).| Product Remediations created (2).| Product Identifiers created (4).| Product Identifiers removed (4).| References created (23).| CWES updated (1)." }, { "date": "2026-10-30T00:10:24.164407Z", "number": "19", "summary": "Unknown change." } ], "status": "interim", "version": "19" } }, "product_tree": { "branches": [ { "branches": [ { "branches": [ { "category": "product_version_range", "name": "vers:rpm/1", "product": { "name": "vers:rpm/1", "product_id": "CSAFPID-6014972", "product_identification_helper": { "cpe": "cpe:/a:redhat:hummingbird:1" } } } ], "category": "product_name", "name": "Red Hat Hardened Images" }, { "branches": [ { "branches": [ { "category": "product_version_range", "name": "vers:rpm/unknown", "product": { "name": "vers:rpm/unknown", "product_id": "CSAFPID-9710183" } } ], "category": "product_name", "name": "go-fdo-server" }, { "branches": [ { "category": "product_version_range", "name": "vers:rpm/unknown", "product": { "name": "vers:rpm/unknown", "product_id": "CSAFPID-8902830" } } ], "category": "product_name", "name": "grafana12.4" }, { "branches": [ { "category": "product_version_range", "name": "vers:rpm/13.1.8-0.3.hum1", "product": { "name": "vers:rpm/13.1.8-0.3.hum1", "product_id": "CSAFPID-9821941", "product_identification_helper": { "purl": "pkg:rpm/redhat/grafana13.1@13.1.8-0.3.hum1?arch=x86_64&distro=hummingbird-20251124&repository_id=public-hummingbird-x86_64-rpms" } } }, { "category": "product_version_range", "name": "vers:rpm/unknown", "product": { "name": "vers:rpm/unknown", "product_id": "CSAFPID-8902831" } } ], "category": "product_name", "name": "grafana13.1" }, { "branches": [ { "category": "product_version_range", "name": "vers:rpm/13.2.3-0.3.hum1", "product": { "name": "vers:rpm/13.2.3-0.3.hum1", "product_id": "CSAFPID-9764774", "product_identification_helper": { "purl": "pkg:rpm/redhat/grafana13.2@13.2.3-0.3.hum1?arch=x86_64&distro=hummingbird-20251124&repository_id=public-hummingbird-x86_64-rpms" } } }, { "category": "product_version_range", "name": "vers:rpm/unknown", "product": { "name": "vers:rpm/unknown", "product_id": "CSAFPID-9053231" } } ], "category": "product_name", "name": "grafana13.2" }, { "branches": [ { "category": "product_version_range", "name": "vers:rpm/unknown", "product": { "name": "vers:rpm/unknown", "product_id": "CSAFPID-9053232" } } ], "category": "product_name", "name": "hugo" } ], "category": "product_family", "name": "Red Hat Hardened Images" } ], "category": "vendor", "name": "Red Hat" }, { "branches": [ { "branches": [ { "branches": [ { "category": "product_version_range", "name": "vers:deb/*", "product": { "name": "vers:deb/*", "product_id": "CSAFPID-9714347" } } ], "category": "product_name", "name": "golang-github-getkin-kin-openapi" } ], "category": "product_family", "name": "bookworm" } ], "category": "vendor", "name": "debian" }, { "branches": [ { "branches": [ { "category": "product_version_range", "name": "vers:unknown/>=0.136.0|<0.149.0", "product": { "name": "vers:unknown/>=0.136.0|<0.149.0", "product_id": "CSAFPID-9727226" } }, { "category": "product_version_range", "name": "vers:unknown/v0.136.0", "product": { "name": "vers:unknown/v0.136.0", "product_id": "CSAFPID-8978166" } }, { "category": "product_version_range", "name": "vers:unknown/v0.137.0", "product": { "name": "vers:unknown/v0.137.0", "product_id": "CSAFPID-8978165" } }, { "category": "product_version_range", "name": "vers:unknown/v0.138.0", "product": { "name": "vers:unknown/v0.138.0", "product_id": "CSAFPID-8978164" } }, { "category": "product_version_range", "name": "vers:unknown/v0.139.0", "product": { "name": "vers:unknown/v0.139.0", "product_id": "CSAFPID-8978163" } }, { "category": "product_version_range", "name": "vers:unknown/v0.140.0", "product": { "name": "vers:unknown/v0.140.0", "product_id": "CSAFPID-8978162" } }, { "category": "product_version_range", "name": "vers:unknown/v0.141.0", "product": { "name": "vers:unknown/v0.141.0", "product_id": "CSAFPID-8978161" } }, { "category": "product_version_range", "name": "vers:unknown/v0.142.0", "product": { "name": "vers:unknown/v0.142.0", "product_id": "CSAFPID-8978160" } }, { "category": "product_version_range", "name": "vers:unknown/v0.143.0", "product": { "name": "vers:unknown/v0.143.0", "product_id": "CSAFPID-8978159" } }, { "category": "product_version_range", "name": "vers:unknown/v0.144.0", "product": { "name": "vers:unknown/v0.144.0", "product_id": "CSAFPID-9727426" } }, { "category": "product_version_range", "name": "vers:unknown/v0.145.0", "product": { "name": "vers:unknown/v0.145.0", "product_id": "CSAFPID-9727427" } }, { "category": "product_version_range", "name": "vers:unknown/v0.146.0", "product": { "name": "vers:unknown/v0.146.0", "product_id": "CSAFPID-9727428" } }, { "category": "product_version_range", "name": "vers:unknown/v0.147.0", "product": { "name": "vers:unknown/v0.147.0", "product_id": "CSAFPID-9727429" } }, { "category": "product_version_range", "name": "vers:unknown/v0.148.0", "product": { "name": "vers:unknown/v0.148.0", "product_id": "CSAFPID-9727430" } } ], "category": "product_name", "name": "kin-openapi" } ], "category": "vendor", "name": "getkin" } ] }, "vulnerabilities": [ { "cve": "CVE-2026-100353", "cwe": { "id": "CWE-476", "name": "NULL Pointer Dereference" }, "notes": [ { "category": "description", "text": "A flaw was found in kin-openapi. An unauthenticated remote attacker can cause a Denial of Service (DoS) by sending specially crafted HTTP requests containing specific array query parameters or form-encoded data. Because the request decoder fails to properly validate certain array schemas before accessing them, processing these requests triggers an unhandled crash.", "title": "redhat - https://access.redhat.com/errata/RHSA-2026:87077" }, { "category": "description", "text": "kin-openapi is a Go project for handling OpenAPI files. From 0.136.0 until 0.149.0, three openapi3filter decoder paths that were missed by the fix for GHSA-p6wj-qrr4-pgh5 lack a nil-items guard for legal OpenAPI 3.1 array schemas. An unauthenticated remote client can trigger a deterministic nil-pointer panic through an array query parameter, a deepObject query parameter containing an array property, or an application/x-www-form-urlencoded request body whose array property appears inside an allOf, anyOf, or oneOf subschema. The query and composed-body paths reach urlValuesDecoder.parseArray, while the deepObject path reaches buildResObj, and all pass a nil items schema into code that dereferences it. This issue is fixed in version 0.149.0.", "title": "nvd - https://nvd.nist.gov/vuln/detail/CVE-2026-100353" }, { "category": "description", "text": "## Summary\n\nThe fix for GHSA-p6wj-qrr4-pgh5 addressed a nil-pointer dereference that occurs when an OpenAPI 3.1 array schema omits the `items` keyword (which is legal under JSON Schema 2020-12). That fix patched three decoder paths: the standalone `parseArray` function, the top-level array check in `UrlencodedBodyDecoder`, and `MultipartBodyDecoder`.\n\nThree additional crash paths were missed. All of them reach the unguarded `urlValuesDecoder.parseArray` method (`openapi3filter/req_resp_decoder.go:576`) or the unguarded array branch in `buildResObj` (line 1015):\n\n1. **Query parameters** with `type: array` and no `items`.\n2. **deepObject** query parameters containing an array property with no `items`.\n3. **URL-encoded request bodies** where the array lives inside an `allOf` / `anyOf` / `oneOf` sub-schema. This path bypasses the guard added by the GHSA-p6wj-qrr4-pgh5 fix, because that guard only inspects top-level properties.\n\nEach path is triggerable by an unauthenticated client and produces a deterministic nil-pointer panic during request validation.\n\n## Details\n### Root Cause\n\nThe three paths patched for GHSA-p6wj-qrr4-pgh5 each received a nil-`items` guard:\n\n```go\n// standalone parseArray (line 1143) -- GUARDED\nfunc parseArray(raw []string, schemaRef *openapi3.SchemaRef) ([]any, error) {\n\tif schemaRef.Value.Items == nil || schemaRef.Value.Items.Value == nil { ... }\n\n// UrlencodedBodyDecoder top-level property loop (line 1441) -- GUARDED\nif propSchema.Value.Items == nil || propSchema.Value.Items.Value == nil { ... }\n\n// MultipartBodyDecoder (line 1587) -- GUARDED\nif valueSchema.Value.Items == nil { ... }\n```\n\nBut `urlValuesDecoder.parseArray` (line 576), which handles query-parameter and urlencoded-body array decoding, has **no** such guard:\n\n```go\nfunc (d *urlValuesDecoder) parseArray(raw []string, schemaRef *openapi3.SchemaRef) ([]any, error) {\n\tvar value []any\n\tfor i, v := range raw {\n\t\titem, err := d.parseValue(v, schemaRef.Value.Items) // Items is nil -> panic in parseValue\n```\n\n`parseValue` immediately dereferences the schema it is handed:\n\n```go\nfunc (d *urlValuesDecoder) parseValue(v string, schema *openapi3.SchemaRef) (any, error) {\n\tif len(schema.Value.AllOf) > 0 { // schema == nil here -> nil pointer dereference\n```\n\nFor the deepObject path, `buildResObj` (line 1015) has the same gap. Its array branch recurses with `schema.Value.Items` (line 1028), which can be nil, and the recursive call dereferences it at line 1015:\n\n```go\ncase schema.Value.Type.Is(\"array\"):\n\t// ...\n\tfor i := range arr {\n\t\tr, err := buildResObj(params, mapKeys, strconv.Itoa(i), schema.Value.Items) // nil Items\n```\n\nFor the allOf body path, `UrlencodedBodyDecoder` validates only top-level `schema.Value.Properties` (line 1429-1449). But `decodeSchemaConstructs` (line 1474) recursively walks `AllOf` / `AnyOf` / `OneOf` sub-schemas and calls `decodeProperty` on their properties, which never pass through the top-level guard and reach `urlValuesDecoder.parseArray`.\n\n## Proof of Concept\n\n### Environment\n\n- kin-openapi v0.144.0 (cloned at tag `v0.144.0`, commit `f0407d5`)\n- Go 1.26.7\n- Each PoC calls `doc.Validate()` first to prove the spec is legal, then drives `openapi3filter.ValidateRequest` directly\n\n### Path 1: Query parameter array without items\n\nSpec (query param `ids` is `type: array`, no `items`), request `GET /test?ids=1&ids=2`:\n\n```\nValidate() ACCEPTED the spec (type: array with no items is legal under OAS 3.1)\nCalling ValidateRequest directly (no net/http recover)...\npanic: runtime error: invalid memory address or nil pointer dereference\n[signal 0xc0000005 code=0x0 addr=0x20 ...]\ngithub.com/getkin/kin-openapi/openapi3filter.(*urlValuesDecoder).parseValue(...)\n\treq_resp_decoder.go:605\ngithub.com/getkin/kin-openapi/openapi3filter.(*urlValuesDecoder).parseArray(...)\n\treq_resp_decoder.go:580\ngithub.com/getkin/kin-openapi/openapi3filter.(*urlValuesDecoder).DecodeArray(...)\n\treq_resp_decoder.go:569\n...\ngithub.com/getkin/kin-openapi/openapi3filter.ValidateRequest(...)\n\tvalidate_request.go:83\nexit status 2\n```\n\n### Path 2: deepObject nested array without items\n\nSpec (deepObject param `filter` with array property `tags`, no `items`), request `GET /test?filter[tags][0]=a`:\n\n```\nValidate() ACCEPTED the spec\nCalling ValidateRequest directly...\npanic: runtime error: invalid memory address or nil pointer dereference\ngithub.com/getkin/kin-openapi/openapi3filter.buildResObj(...)\n\treq_resp_decoder.go:1012\ngithub.com/getkin/kin-openapi/openapi3filter.buildResObj(...) <- recursive call with nil Items\n\treq_resp_decoder.go:1028\ngithub.com/getkin/kin-openapi/openapi3filter.makeObject(...)\n\treq_resp_decoder.go:947\n...\nexit status 2\n```\n\n### Path 3: URL-encoded body with array inside allOf (bypasses the existing fix)\n\nSpec (urlencoded body, `allOf` sub-schema with array property `tags`, no `items`), request `POST /submit` body `tags=a&tags=b`:\n\n```\nValidate() ACCEPTED the spec\nCalling ValidateRequest directly...\npanic: runtime error: invalid memory address or nil pointer dereference\ngithub.com/getkin/kin-openapi/openapi3filter.(*urlValuesDecoder).parseValue(...)\n\treq_resp_decoder.go:605\ngithub.com/getkin/kin-openapi/openapi3filter.(*urlValuesDecoder).parseArray(...)\n\treq_resp_decoder.go:580\ngithub.com/getkin/kin-openapi/openapi3filter.(*urlValuesDecoder).DecodeArray(...)\n\treq_resp_decoder.go:569\n...\ngithub.com/getkin/kin-openapi/openapi3filter.decodeProperty(...) <- reached via decodeSchemaConstructs (allOf walker)\n\treq_resp_decoder.go:1519\nexit status 2\n```\n\nThe `decodeProperty` frame confirms the array was reached by walking the `allOf` sub-schema, bypassing the top-level guard that the GHSA-p6wj-qrr4-pgh5 fix added.\n\n### Fix verification\n\nAdding a single nil-`items` guard to `urlValuesDecoder.parseArray` (plus one to the `buildResObj` array branch) turns all three panics into clean validation errors:\n\n```\npoc1: Returned normally, err = parameter \"ids\" in query has an error: array items schema is required for decoding\npoc2: Returned normally, err = parameter \"filter\" in query has an error: path tags: array items schema is required\npoc3: Returned normally, err = (no panic; the allOf property is skipped by the decoder)\n```\n\nThis confirms `urlValuesDecoder.parseArray` is the shared root cause for Paths 1 and 3, and `buildResObj` for Path 2.\n\n## Impact\n\nAn unauthenticated client can trigger a deterministic nil-pointer panic in request validation with a single crafted request, against any application that validates OAS 3.1 requests with `openapi3filter` where a spec declares an array without `items`.\n\nThe severity depends on the host:\n\n| Deployment | Behavior | Availability impact |\n|------------|----------|---------------------|\n| Standard `net/http` server (validation runs in the handler goroutine) | `net/http` recovers the panic per-connection; the connection is dropped and the process survives | Per-request denial of service (A:L) |\n| Non-`net/http` hosts (e.g. fasthttp/connect adapters) or validation performed in an application-spawned goroutine | The panic is not recovered; the process crashes | Full-process denial of service (A:H) |\n\nThis was verified in both configurations: under a live `net/http` server the process survived (the panic was logged as `http: panic serving ...` and the process exited 0 at end of test), while the direct-call PoCs above crashed the process with `exit status 2`.", "title": "github - https://github.com/advisories/GHSA-vrcc-3ch7-hppw" }, { "category": "description", "text": "kin-openapi is a Go project for handling OpenAPI files. From 0.136.0 until 0.149.0, three openapi3filter decoder paths that were missed by the fix for GHSA-p6wj-qrr4-pgh5 lack a nil-items guard for legal OpenAPI 3.1 array schemas. An unauthenticated remote client can trigger a deterministic nil-pointer panic through an array query parameter, a deepObject query parameter containing an array property, or an application/x-www-form-urlencoded request body whose array property appears inside an allOf, anyOf, or oneOf subschema. The query and composed-body paths reach urlValuesDecoder.parseArray, while the deepObject path reaches buildResObj, and all pass a nil items schema into code that dereferences it. This issue is fixed in version 0.149.0.", "title": "debian - https://security-tracker.debian.org/tracker/CVE-2026-100353" }, { "category": "description", "text": "A flaw was found in kin-openapi. An unauthenticated remote attacker can cause a Denial of Service (DoS) by sending specially crafted HTTP requests containing specific array query parameters or form-encoded data. Because the request decoder fails to properly validate certain array schemas before accessing them, processing these requests triggers an unhandled crash.", "title": "redhat - https://access.redhat.com/security/cve/CVE-2026-100353" }, { "category": "description", "text": "## Summary\n\nThe fix for GHSA-p6wj-qrr4-pgh5 addressed a nil-pointer dereference that occurs when an OpenAPI 3.1 array schema omits the `items` keyword (which is legal under JSON Schema 2020-12). That fix patched three decoder paths: the standalone `parseArray` function, the top-level array check in `UrlencodedBodyDecoder`, and `MultipartBodyDecoder`.\n\nThree additional crash paths were missed. All of them reach the unguarded `urlValuesDecoder.parseArray` method (`openapi3filter/req_resp_decoder.go:576`) or the unguarded array branch in `buildResObj` (line 1015):\n\n1. **Query parameters** with `type: array` and no `items`.\n2. **deepObject** query parameters containing an array property with no `items`.\n3. **URL-encoded request bodies** where the array lives inside an `allOf` / `anyOf` / `oneOf` sub-schema. This path bypasses the guard added by the GHSA-p6wj-qrr4-pgh5 fix, because that guard only inspects top-level properties.\n\nEach path is triggerable by an unauthenticated client and produces a deterministic nil-pointer panic during request validation.\n\n## Details\n### Root Cause\n\nThe three paths patched for GHSA-p6wj-qrr4-pgh5 each received a nil-`items` guard:\n\n```go\n// standalone parseArray (line 1143) -- GUARDED\nfunc parseArray(raw []string, schemaRef *openapi3.SchemaRef) ([]any, error) {\n\tif schemaRef.Value.Items == nil || schemaRef.Value.Items.Value == nil { ... }\n\n// UrlencodedBodyDecoder top-level property loop (line 1441) -- GUARDED\nif propSchema.Value.Items == nil || propSchema.Value.Items.Value == nil { ... }\n\n// MultipartBodyDecoder (line 1587) -- GUARDED\nif valueSchema.Value.Items == nil { ... }\n```\n\nBut `urlValuesDecoder.parseArray` (line 576), which handles query-parameter and urlencoded-body array decoding, has **no** such guard:\n\n```go\nfunc (d *urlValuesDecoder) parseArray(raw []string, schemaRef *openapi3.SchemaRef) ([]any, error) {\n\tvar value []any\n\tfor i, v := range raw {\n\t\titem, err := d.parseValue(v, schemaRef.Value.Items) // Items is nil -> panic in parseValue\n```\n\n`parseValue` immediately dereferences the schema it is handed:\n\n```go\nfunc (d *urlValuesDecoder) parseValue(v string, schema *openapi3.SchemaRef) (any, error) {\n\tif len(schema.Value.AllOf) > 0 { // schema == nil here -> nil pointer dereference\n```\n\nFor the deepObject path, `buildResObj` (line 1015) has the same gap. Its array branch recurses with `schema.Value.Items` (line 1028), which can be nil, and the recursive call dereferences it at line 1015:\n\n```go\ncase schema.Value.Type.Is(\"array\"):\n\t// ...\n\tfor i := range arr {\n\t\tr, err := buildResObj(params, mapKeys, strconv.Itoa(i), schema.Value.Items) // nil Items\n```\n\nFor the allOf body path, `UrlencodedBodyDecoder` validates only top-level `schema.Value.Properties` (line 1429-1449). But `decodeSchemaConstructs` (line 1474) recursively walks `AllOf` / `AnyOf` / `OneOf` sub-schemas and calls `decodeProperty` on their properties, which never pass through the top-level guard and reach `urlValuesDecoder.parseArray`.\n\n## Proof of Concept\n\n### Environment\n\n- kin-openapi v0.144.0 (cloned at tag `v0.144.0`, commit `f0407d5`)\n- Go 1.26.7\n- Each PoC calls `doc.Validate()` first to prove the spec is legal, then drives `openapi3filter.ValidateRequest` directly\n\n### Path 1: Query parameter array without items\n\nSpec (query param `ids` is `type: array`, no `items`), request `GET /test?ids=1&ids=2`:\n\n```\nValidate() ACCEPTED the spec (type: array with no items is legal under OAS 3.1)\nCalling ValidateRequest directly (no net/http recover)...\npanic: runtime error: invalid memory address or nil pointer dereference\n[signal 0xc0000005 code=0x0 addr=0x20 ...]\ngithub.com/getkin/kin-openapi/openapi3filter.(*urlValuesDecoder).parseValue(...)\n\treq_resp_decoder.go:605\ngithub.com/getkin/kin-openapi/openapi3filter.(*urlValuesDecoder).parseArray(...)\n\treq_resp_decoder.go:580\ngithub.com/getkin/kin-openapi/openapi3filter.(*urlValuesDecoder).DecodeArray(...)\n\treq_resp_decoder.go:569\n...\ngithub.com/getkin/kin-openapi/openapi3filter.ValidateRequest(...)\n\tvalidate_request.go:83\nexit status 2\n```\n\n### Path 2: deepObject nested array without items\n\nSpec (deepObject param `filter` with array property `tags`, no `items`), request `GET /test?filter[tags][0]=a`:\n\n```\nValidate() ACCEPTED the spec\nCalling ValidateRequest directly...\npanic: runtime error: invalid memory address or nil pointer dereference\ngithub.com/getkin/kin-openapi/openapi3filter.buildResObj(...)\n\treq_resp_decoder.go:1012\ngithub.com/getkin/kin-openapi/openapi3filter.buildResObj(...) <- recursive call with nil Items\n\treq_resp_decoder.go:1028\ngithub.com/getkin/kin-openapi/openapi3filter.makeObject(...)\n\treq_resp_decoder.go:947\n...\nexit status 2\n```\n\n### Path 3: URL-encoded body with array inside allOf (bypasses the existing fix)\n\nSpec (urlencoded body, `allOf` sub-schema with array property `tags`, no `items`), request `POST /submit` body `tags=a&tags=b`:\n\n```\nValidate() ACCEPTED the spec\nCalling ValidateRequest directly...\npanic: runtime error: invalid memory address or nil pointer dereference\ngithub.com/getkin/kin-openapi/openapi3filter.(*urlValuesDecoder).parseValue(...)\n\treq_resp_decoder.go:605\ngithub.com/getkin/kin-openapi/openapi3filter.(*urlValuesDecoder).parseArray(...)\n\treq_resp_decoder.go:580\ngithub.com/getkin/kin-openapi/openapi3filter.(*urlValuesDecoder).DecodeArray(...)\n\treq_resp_decoder.go:569\n...\ngithub.com/getkin/kin-openapi/openapi3filter.decodeProperty(...) <- reached via decodeSchemaConstructs (allOf walker)\n\treq_resp_decoder.go:1519\nexit status 2\n```\n\nThe `decodeProperty` frame confirms the array was reached by walking the `allOf` sub-schema, bypassing the top-level guard that the GHSA-p6wj-qrr4-pgh5 fix added.\n\n### Fix verification\n\nAdding a single nil-`items` guard to `urlValuesDecoder.parseArray` (plus one to the `buildResObj` array branch) turns all three panics into clean validation errors:\n\n```\npoc1: Returned normally, err = parameter \"ids\" in query has an error: array items schema is required for decoding\npoc2: Returned normally, err = parameter \"filter\" in query has an error: path tags: array items schema is required\npoc3: Returned normally, err = (no panic; the allOf property is skipped by the decoder)\n```\n\nThis confirms `urlValuesDecoder.parseArray` is the shared root cause for Paths 1 and 3, and `buildResObj` for Path 2.\n\n## Impact\n\nAn unauthenticated client can trigger a deterministic nil-pointer panic in request validation with a single crafted request, against any application that validates OAS 3.1 requests with `openapi3filter` where a spec declares an array without `items`.\n\nThe severity depends on the host:\n\n| Deployment | Behavior | Availability impact |\n|------------|----------|---------------------|\n| Standard `net/http` server (validation runs in the handler goroutine) | `net/http` recovers the panic per-connection; the connection is dropped and the process survives | Per-request denial of service (A:L) |\n| Non-`net/http` hosts (e.g. fasthttp/connect adapters) or validation performed in an application-spawned goroutine | The panic is not recovered; the process crashes | Full-process denial of service (A:H) |\n\nThis was verified in both configurations: under a live `net/http` server the process survived (the panic was logged as `http: panic serving ...` and the process exited 0 at end of test), while the direct-call PoCs above crashed the process with `exit status 2`.", "title": "osvgo - https://www.googleapis.com/download/storage/v1/b/osv-vulnerabilities/o/Go%2FGHSA-vrcc-3ch7-hppw.json?alt=media" }, { "category": "description", "text": "kin-openapi is a Go project for handling OpenAPI files. From 0.136.0 until 0.149.0, three openapi3filter decoder paths that were missed by the fix for GHSA-p6wj-qrr4-pgh5 lack a nil-items guard for legal OpenAPI 3.1 array schemas. An unauthenticated remote client can trigger a deterministic nil-pointer panic through an array query parameter, a deepObject query parameter containing an array property, or an application/x-www-form-urlencoded request body whose array property appears inside an allOf, anyOf, or oneOf subschema. The query and composed-body paths reach urlValuesDecoder.parseArray, while the deepObject path reaches buildResObj, and all pass a nil items schema into code that dereferences it. This issue is fixed in version 0.149.0.", "title": "osvgit - https://www.googleapis.com/download/storage/v1/b/osv-vulnerabilities/o/GIT%2FCVE-2026-100353.json?alt=media" }, { "category": "description", "text": "kin-openapi is a Go project for handling OpenAPI files. From 0.136.0 until 0.149.0, three openapi3filter decoder paths that were missed by the fix for GHSA-p6wj-qrr4-pgh5 lack a nil-items guard for legal OpenAPI 3.1 array schemas. An unauthenticated remote client can trigger a deterministic nil-pointer panic through an array query parameter, a deepObject query parameter containing an array property, or an application/x-www-form-urlencoded request body whose array property appears inside an allOf, anyOf, or oneOf subschema. The query and composed-body paths reach urlValuesDecoder.parseArray, while the deepObject path reaches buildResObj, and all pass a nil items schema into code that dereferences it. This issue is fixed in version 0.149.0.", "title": "cveprojectv5 - https://www.cve.org/CVERecord?id=CVE-2026-100353" }, { "category": "description", "text": "A flaw was found in kin-openapi. An unauthenticated remote attacker can cause a Denial of Service (DoS) by sending specially crafted HTTP requests containing specific array query parameters or form-encoded data. Because the request decoder fails to properly validate certain array schemas before accessing them, processing these requests triggers an unhandled crash.", "title": "redhat - https://access.redhat.com/errata/RHSA-2026:85266" }, { "category": "other", "text": "0.00335", "title": "EPSS" }, { "category": "other", "text": "4.6", "title": "NCSC Score" }, { "category": "other", "text": "VENDOR FIX as product remediation category", "title": "NCSC Score top increasing factors" }, { "category": "other", "text": "There is product_remediation data available from source Redhat", "title": "NCSC Score top decreasing factors" }, { "category": "details", "text": "Severity: 3\n", "title": "Vendor assessment" } ], "product_status": { "fixed": [ "CSAFPID-9764774", "CSAFPID-9821941" ], "known_affected": [ "CSAFPID-6014972", "CSAFPID-8902830", "CSAFPID-8902831", "CSAFPID-9053231", "CSAFPID-9053232", "CSAFPID-9727226", "CSAFPID-8978166", "CSAFPID-8978165", "CSAFPID-8978164", "CSAFPID-8978163", "CSAFPID-8978162", "CSAFPID-8978161", "CSAFPID-8978160", "CSAFPID-8978159", "CSAFPID-9727426", "CSAFPID-9727427", "CSAFPID-9727428", "CSAFPID-9727429", "CSAFPID-9727430" ], "known_not_affected": [ "CSAFPID-9714347", "CSAFPID-9710183" ] }, "references": [ { "category": "external", "summary": "Source - ncscclear", "url": "https://vulnerabilities.ncsc.nl/manual/CVE-2026-100353" }, { "category": "external", "summary": "Source - nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-100353" }, { "category": "external", "summary": "Source - github", "url": "https://github.com/advisories/GHSA-vrcc-3ch7-hppw" }, { "category": "external", "summary": "Source - redhat", "url": "https://access.redhat.com/security/cve/CVE-2026-100353" }, { "category": "external", "summary": "Source - debian", "url": "https://security-tracker.debian.org/tracker/CVE-2026-100353" }, { "category": "external", "summary": "Source - osvgo", "url": "https://www.googleapis.com/download/storage/v1/b/osv-vulnerabilities/o/Go%2FGHSA-vrcc-3ch7-hppw.json?alt=media" }, { "category": "external", "summary": "Source - osv", "url": "https://www.googleapis.com/download/storage/v1/b/osv-vulnerabilities/o/GIT%2FCVE-2026-100353.json?alt=media" }, { "category": "external", "summary": "Source - cveprojectv5", "url": "https://www.cve.org/CVERecord?id=CVE-2026-100353" }, { "category": "external", "summary": "Source - first", "url": "https://api.first.org/data/v1/epss" }, { "category": "external", "summary": "Source - redhat", "url": "https://access.redhat.com/errata/RHSA-2026:85266" }, { "category": "external", "summary": "Source - redhat", "url": "https://access.redhat.com/errata/RHSA-2026:87077" }, { "category": "external", "summary": "Reference - redhat", "url": "https://access.redhat.com/security/cve/CVE-2026-100353" }, { "category": "external", "summary": "Reference - redhat", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2553592" }, { "category": "external", "summary": "Reference - redhat", "url": "https://www.cve.org/CVERecord?id=CVE-2026-100353" }, { "category": "external", "summary": "Reference - github; osv; osvgo; redhat", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-100353" }, { "category": "external", "summary": "Reference - cveprojectv5; github; nvd; osv; osvgo; redhat", "url": "https://github.com/getkin/kin-openapi/commit/9814d1f2b212f3508bf52296aa9e248b2122a5a9" }, { "category": "external", "summary": "Reference - cveprojectv5; github; nvd; osv; osvgo; redhat", "url": "https://github.com/getkin/kin-openapi/releases/tag/v0.149.0" }, { "category": "external", "summary": "Reference - cveprojectv5; github; nvd; osv; osvgo; redhat", "url": "https://github.com/getkin/kin-openapi/security/advisories/GHSA-vrcc-3ch7-hppw" }, { "category": "external", "summary": "Reference - redhat", "url": "https://access.redhat.com/errata/RHSA-2026:87077" }, { "category": "external", "summary": "Reference - redhat", "url": "https://access.redhat.com/security/cve/CVE-2026-100347" }, { "category": "external", "summary": "Reference - redhat", "url": "https://access.redhat.com/security/cve/CVE-2026-100348" }, { "category": "external", "summary": "Reference - redhat", "url": "https://access.redhat.com/security/cve/CVE-2026-100349" }, { "category": "external", "summary": "Reference - redhat", "url": "https://access.redhat.com/security/cve/CVE-2026-100351" }, { "category": "external", "summary": "Reference - redhat", "url": "https://access.redhat.com/security/cve/CVE-2026-100352" }, { "category": "external", "summary": "Reference - redhat", "url": "https://access.redhat.com/security/cve/CVE-2026-100354" }, { "category": "external", "summary": "Reference - redhat", "url": "https://access.redhat.com/security/cve/CVE-2026-110816" }, { "category": "external", "summary": "Reference - redhat", "url": "https://access.redhat.com/security/cve/CVE-2026-15577" }, { "category": "external", "summary": "Reference - redhat", "url": "https://access.redhat.com/security/cve/CVE-2026-33374" }, { "category": "external", "summary": "Reference - redhat", "url": "https://access.redhat.com/security/cve/CVE-2026-93294" }, { "category": "external", "summary": "Reference - redhat", "url": "https://access.redhat.com/security/cve/CVE-2026-95502" }, { "category": "external", "summary": "Reference - redhat", "url": "https://access.redhat.com/security/updates/classification/" }, { "category": "external", "summary": "Reference - redhat", "url": "https://images.redhat.com/" }, { "category": "external", "summary": "Reference - redhat", "url": "https://access.redhat.com/security/cve/CVE-2026-92539" }, { "category": "external", "summary": "Reference - redhat", "url": "https://security.access.redhat.com/data/csaf/v2/advisories/2026/rhsa-2026_87077.json" }, { "category": "external", "summary": "Reference - github", "url": "https://github.com/advisories/GHSA-vrcc-3ch7-hppw" }, { "category": "external", "summary": "Reference - osv", "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/100xxx/CVE-2026-100353.json" }, { "category": "external", "summary": "Reference - redhat", "url": "https://access.redhat.com/errata/RHSA-2026:85266" }, { "category": "external", "summary": "Reference - redhat", "url": "https://access.redhat.com/security/cve/CVE-2026-93450" }, { "category": "external", "summary": "Reference - redhat", "url": "https://security.access.redhat.com/data/csaf/v2/advisories/2026/rhsa-2026_85266.json" } ], "remediations": [ { "category": "vendor_fix", "details": "For details on how to apply this update, which includes the changes described in this advisory, refer to:\nhttps://images.redhat.com/", "product_ids": [ "CSAFPID-9764774" ], "restart_required": { "category": "none" }, "url": "https://access.redhat.com/errata/RHSA-2026:85266" }, { "category": "vendor_fix", "details": "For details on how to apply this update, which includes the changes described in this advisory, refer to:\nhttps://images.redhat.com/", "product_ids": [ "CSAFPID-9821941" ], "restart_required": { "category": "none" }, "url": "https://access.redhat.com/errata/RHSA-2026:87077" } ], "scores": [ { "cvss_v3": { "version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "baseScore": 7.5, "baseSeverity": "HIGH" }, "products": [ "CSAFPID-6014972", "CSAFPID-8902830", "CSAFPID-8902831", "CSAFPID-8978159", "CSAFPID-8978160", "CSAFPID-8978161", "CSAFPID-8978162", "CSAFPID-8978163", "CSAFPID-8978164", "CSAFPID-8978165", "CSAFPID-8978166", "CSAFPID-9053231", "CSAFPID-9053232", "CSAFPID-9727226", "CSAFPID-9727426", "CSAFPID-9727427", "CSAFPID-9727428", "CSAFPID-9727429", "CSAFPID-9727430" ] } ], "title": "CVE-2026-100353" } ] }