{ "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-2026-33528", "tracking": { "current_release_date": "2026-04-02T18:31:52.898707Z", "generator": { "date": "2026-02-17T15:00:00Z", "engine": { "name": "V.E.L.M.A", "version": "1.7" } }, "id": "CVE-2026-33528", "initial_release_date": "2026-03-24T20:53:54.040656Z", "revision_history": [ { "date": "2026-03-24T20:53:54.040656Z", "number": "1", "summary": "CVE created.| Source created.| CVE status created. (valid)| Description created for source.| CVSS created.| Products created (1).| References created (3).| CWES updated (1)." }, { "date": "2026-03-24T20:53:57.281142Z", "number": "2", "summary": "NCSC Score created." }, { "date": "2026-03-25T01:00:10.880783Z", "number": "3", "summary": "Source created.| CVE status created. (valid)| Description created for source.| CVSS created.| References created (4).| CWES updated (1)." }, { "date": "2026-03-25T01:00:13.932294Z", "number": "4", "summary": "NCSC Score updated." }, { "date": "2026-03-26T20:26:52.937044Z", "number": "5", "summary": "Source created.| CVE status created. (valid)| Description created for source.| CVSS created.| References created (3).| CWES updated (1)." }, { "date": "2026-03-26T20:26:55.534485Z", "number": "6", "summary": "NCSC Score updated." }, { "date": "2026-03-26T20:39:14.830594Z", "number": "7", "summary": "Source created.| CVE status created. (valid)| Description created for source.| CVSS created.| Products created (1).| References created (3).| CWES updated (1)." }, { "date": "2026-03-26T20:39:17.162810Z", "number": "8", "summary": "NCSC Score updated." }, { "date": "2026-03-27T00:13:56.392516Z", "number": "9", "summary": "Source created.| CVE status created. (valid)| Description created for source.| References created (3)." }, { "date": "2026-03-27T19:44:00.928969Z", "number": "10", "summary": "Unknown change." }, { "date": "2026-03-27T20:56:47.424232Z", "number": "11", "summary": "Source connected.| CVE status created. (valid)| EPSS created." }, { "date": "2026-03-27T20:56:49.328962Z", "number": "12", "summary": "NCSC Score updated." }, { "date": "2026-03-28T07:57:48.696375Z", "number": "13", "summary": "References created (1)." }, { "date": "2026-04-02T18:25:25.389060Z", "number": "14", "summary": "Products created (1).| Product Identifiers created (1).| Exploits created (1)." }, { "date": "2026-04-02T18:25:29.312601Z", "number": "15", "summary": "NCSC Score updated." } ], "status": "interim", "version": "15" } }, "product_tree": { "branches": [ { "branches": [ { "branches": [ { "category": "product_version_range", "name": "vers:unknown/<0.27.5", "product": { "name": "vers:unknown/<0.27.5", "product_id": "CSAFPID-5985128", "product_identification_helper": { "cpe": "cpe:2.3:a:godoxy:godoxy:*:*:*:*:*:go:*:*" } } } ], "category": "product_name", "name": "godoxy" } ], "category": "vendor", "name": "godoxy" }, { "branches": [ { "branches": [ { "category": "product_version_range", "name": "vers:unknown/<0.27.5", "product": { "name": "vers:unknown/<0.27.5", "product_id": "CSAFPID-5919234" } }, { "category": "product_version_range", "name": "vers:unknown/>=0|<0.27.5", "product": { "name": "vers:unknown/>=0|<0.27.5", "product_id": "CSAFPID-5902799" } } ], "category": "product_name", "name": "godoxy" } ], "category": "vendor", "name": "yusing" } ] }, "vulnerabilities": [ { "cve": "CVE-2026-33528", "cwe": { "id": "CWE-22", "name": "Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')" }, "notes": [ { "category": "description", "text": "## Summary\n\nThe file content API endpoint at `/api/v1/file/content` is vulnerable to path traversal. The `filename` query parameter is passed directly to `path.Join(common.ConfigBasePath, filename)` where `ConfigBasePath = \"config\"` (a relative path). No sanitization or validation is applied beyond checking that the field is non-empty (`binding:\"required\"`).\n\nAn authenticated attacker can use `../` sequences to read or write files outside the intended `config/` directory, including TLS private keys, OAuth refresh tokens, and any file accessible to the container's UID.\n\n## Root Cause\n\n**File:** `internal/api/v1/file/get.go`, lines 68-73:\n\n```go\nfunc (t FileType) GetPath(filename string) string {\n if t == FileTypeMiddleware {\n return path.Join(common.MiddlewareComposeBasePath, filename)\n }\n return path.Join(common.ConfigBasePath, filename)\n}\n```\n\n- `common.ConfigBasePath = \"config\"` — relative path, not absolute\n- `path.Join(\"config\", \"../certs/key.pem\")` normalizes to `\"certs/key.pem\"` — escaping `config/`\n- No call to `strings.HasPrefix`, `filepath.Rel`, or any containment check exists\n- The `format:\"filename\"` struct tag is an OpenAPI/Swagger annotation only, not enforced by the validator\n\n## Proof of Concept\n\n### Environment\n\n- GoDoxy v0.27.4 (`ghcr.io/yusing/godoxy:latest`)\n- Authentication enabled with default credentials (`admin`/`password`)\n\n### Steps to Reproduce\n\n**Step 1 — Authenticate:**\n\n**Step 2 — Read file outside config/ via path traversal:**\n\n```http\nGET /api/v1/file/content?type=config&filename=../certs/secret-agent-key.pem HTTP/1.1\nHost: localhost:8888\nCookie: godoxy_token=\n```\n\n### HTTP Response\n\n```\nHTTP/1.1 200 OK\nCache-Control: no-cache, no-store, must-revalidate\nContent-Length: 43\nContent-Type: application/godoxy+yaml\nExpires: 0\nPragma: no-cache\n\nTHIS_IS_A_SECRET_PRIVATE_KEY_FOR_AGENT_TLS\n```\n\"image\"\n\n## Impact\n\n### Files accessible via this vulnerability\n\n| Path (relative to `config/`) | Contents | Risk |\n|-------------------------------|----------|------|\n| `../certs/agents/{host}.zip` | CA cert + server cert + **TLS private key** | Impersonate GoDoxy server to remote agents |\n| `../data/oauth_refresh_tokens.json` | OIDC refresh tokens for all active sessions | Account takeover via token reuse |\n| `../../etc/ssl/certs/ca-certificates.crt` | System CA certificates | Information disclosure |\n| Any file readable by UID 1000 | Depends on mounted volumes | Variable |\n\nThe `PUT /api/v1/file/content` endpoint is also affected. While the content must pass YAML schema validation (config or provider format), an attacker can write valid provider YAML files outside `config/`, potentially injecting malicious route definitions.\n\n\n## Suggested Remediation\n\nValidate that the resolved path remains within the base directory:\n\n```go\nfunc (t FileType) GetPath(filename string) (string, error) {\n var base string\n if t == FileTypeMiddleware {\n base = common.MiddlewareComposeBasePath\n } else {\n base = common.ConfigBasePath\n }\n\n absBase, _ := filepath.Abs(base)\n resolved, _ := filepath.Abs(filepath.Join(base, filename))\n\n if !strings.HasPrefix(resolved, absBase+string(filepath.Separator)) {\n return \"\", fmt.Errorf(\"path traversal detected: %s\", filename)\n }\n\n return resolved, nil\n}\n```", "title": "osv - https://www.googleapis.com/download/storage/v1/b/osv-vulnerabilities/o/Go%2FGHSA-4753-cmc8-8j9v.json?alt=media" }, { "category": "description", "text": "## Summary\n\nThe file content API endpoint at `/api/v1/file/content` is vulnerable to path traversal. The `filename` query parameter is passed directly to `path.Join(common.ConfigBasePath, filename)` where `ConfigBasePath = \"config\"` (a relative path). No sanitization or validation is applied beyond checking that the field is non-empty (`binding:\"required\"`).\n\nAn authenticated attacker can use `../` sequences to read or write files outside the intended `config/` directory, including TLS private keys, OAuth refresh tokens, and any file accessible to the container's UID.\n\n## Root Cause\n\n**File:** `internal/api/v1/file/get.go`, lines 68-73:\n\n```go\nfunc (t FileType) GetPath(filename string) string {\n if t == FileTypeMiddleware {\n return path.Join(common.MiddlewareComposeBasePath, filename)\n }\n return path.Join(common.ConfigBasePath, filename)\n}\n```\n\n- `common.ConfigBasePath = \"config\"` — relative path, not absolute\n- `path.Join(\"config\", \"../certs/key.pem\")` normalizes to `\"certs/key.pem\"` — escaping `config/`\n- No call to `strings.HasPrefix`, `filepath.Rel`, or any containment check exists\n- The `format:\"filename\"` struct tag is an OpenAPI/Swagger annotation only, not enforced by the validator\n\n## Proof of Concept\n\n### Environment\n\n- GoDoxy v0.27.4 (`ghcr.io/yusing/godoxy:latest`)\n- Authentication enabled with default credentials (`admin`/`password`)\n\n### Steps to Reproduce\n\n**Step 1 — Authenticate:**\n\n**Step 2 — Read file outside config/ via path traversal:**\n\n```http\nGET /api/v1/file/content?type=config&filename=../certs/secret-agent-key.pem HTTP/1.1\nHost: localhost:8888\nCookie: godoxy_token=\n```\n\n### HTTP Response\n\n```\nHTTP/1.1 200 OK\nCache-Control: no-cache, no-store, must-revalidate\nContent-Length: 43\nContent-Type: application/godoxy+yaml\nExpires: 0\nPragma: no-cache\n\nTHIS_IS_A_SECRET_PRIVATE_KEY_FOR_AGENT_TLS\n```\n\"image\"\n\n## Impact\n\n### Files accessible via this vulnerability\n\n| Path (relative to `config/`) | Contents | Risk |\n|-------------------------------|----------|------|\n| `../certs/agents/{host}.zip` | CA cert + server cert + **TLS private key** | Impersonate GoDoxy server to remote agents |\n| `../data/oauth_refresh_tokens.json` | OIDC refresh tokens for all active sessions | Account takeover via token reuse |\n| `../../etc/ssl/certs/ca-certificates.crt` | System CA certificates | Information disclosure |\n| Any file readable by UID 1000 | Depends on mounted volumes | Variable |\n\nThe `PUT /api/v1/file/content` endpoint is also affected. While the content must pass YAML schema validation (config or provider format), an attacker can write valid provider YAML files outside `config/`, potentially injecting malicious route definitions.\n\n\n## Suggested Remediation\n\nValidate that the resolved path remains within the base directory:\n\n```go\nfunc (t FileType) GetPath(filename string) (string, error) {\n var base string\n if t == FileTypeMiddleware {\n base = common.MiddlewareComposeBasePath\n } else {\n base = common.ConfigBasePath\n }\n\n absBase, _ := filepath.Abs(base)\n resolved, _ := filepath.Abs(filepath.Join(base, filename))\n\n if !strings.HasPrefix(resolved, absBase+string(filepath.Separator)) {\n return \"\", fmt.Errorf(\"path traversal detected: %s\", filename)\n }\n\n return resolved, nil\n}\n```", "title": "github - https://api.github.com/advisories/GHSA-4753-cmc8-8j9v" }, { "category": "description", "text": "GoDoxy is a reverse proxy and container orchestrator for self-hosters. Prior to version 0.27.5, the file content API endpoint at `/api/v1/file/content` is vulnerable to path traversal. The `filename` query parameter is passed directly to `path.Join(common.ConfigBasePath, filename)` where `ConfigBasePath = \"config\"` (a relative path). No sanitization or validation is applied beyond checking that the field is non-empty (`binding:\"required\"`). An authenticated attacker can use `../` sequences to read or write files outside the intended `config/` directory, including TLS private keys, OAuth refresh tokens, and any file accessible to the container's UID. Version 0.27.5 fixes the issue.", "title": "nvd - https://services.nvd.nist.gov/rest/json/cves/2.0?cveId=CVE-2026-33528" }, { "category": "description", "text": "GoDoxy is a reverse proxy and container orchestrator for self-hosters. Prior to version 0.27.5, the file content API endpoint at `/api/v1/file/content` is vulnerable to path traversal. The `filename` query parameter is passed directly to `path.Join(common.ConfigBasePath, filename)` where `ConfigBasePath = \"config\"` (a relative path). No sanitization or validation is applied beyond checking that the field is non-empty (`binding:\"required\"`). An authenticated attacker can use `../` sequences to read or write files outside the intended `config/` directory, including TLS private keys, OAuth refresh tokens, and any file accessible to the container's UID. Version 0.27.5 fixes the issue.", "title": "cveprojectv5 - https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2026/33xxx/CVE-2026-33528.json" }, { "category": "description", "text": "GoDoxy has a Path Traversal Vulnerability in its File API in github.com/yusing/godoxy", "title": "osv - https://www.googleapis.com/download/storage/v1/b/osv-vulnerabilities/o/Go%2FGO-2026-4817.json?alt=media" }, { "category": "other", "text": "0.00043", "title": "EPSS" }, { "category": "other", "text": "3.5", "title": "NCSC Score" }, { "category": "other", "text": "There is exploit data available from source Nvd, Exploit code publicly available", "title": "NCSC Score top decreasing factors" } ], "product_status": { "known_affected": [ "CSAFPID-5902799", "CSAFPID-5919234", "CSAFPID-5985128" ] }, "references": [ { "category": "external", "summary": "Source - osv", "url": "https://www.googleapis.com/download/storage/v1/b/osv-vulnerabilities/o/Go%2FGHSA-4753-cmc8-8j9v.json?alt=media" }, { "category": "external", "summary": "Source - github", "url": "https://api.github.com/advisories/GHSA-4753-cmc8-8j9v" }, { "category": "external", "summary": "Source - nvd", "url": "https://services.nvd.nist.gov/rest/json/cves/2.0?cveId=CVE-2026-33528" }, { "category": "external", "summary": "Source - cveprojectv5", "url": "https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2026/33xxx/CVE-2026-33528.json" }, { "category": "external", "summary": "Source - osv", "url": "https://www.googleapis.com/download/storage/v1/b/osv-vulnerabilities/o/Go%2FGO-2026-4817.json?alt=media" }, { "category": "external", "summary": "Source - first", "url": "https://api.first.org/data/v1/epss?limit=10000&offset=0" }, { "category": "external", "summary": "Reference - cveprojectv5; github; nvd; osv", "url": "https://github.com/yusing/godoxy/security/advisories/GHSA-4753-cmc8-8j9v" }, { "category": "external", "summary": "Reference - cveprojectv5; github; nvd; osv", "url": "https://github.com/yusing/godoxy/commit/a541d75bb50f1b542c096d8bc8082c3549f5c059" }, { "category": "external", "summary": "Reference - cveprojectv5; github; nvd; osv", "url": "https://github.com/yusing/godoxy/releases/tag/v0.27.5" }, { "category": "external", "summary": "Reference - github", "url": "https://github.com/advisories/GHSA-4753-cmc8-8j9v" }, { "category": "external", "summary": "Reference - github", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-33528" } ], "scores": [ { "cvss_v3": { "version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:N", "baseScore": 6.5, "baseSeverity": "MEDIUM" }, "products": [ "CSAFPID-5902799", "CSAFPID-5919234", "CSAFPID-5985128" ] } ], "title": "CVE-2026-33528" } ] }