{ "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-2026-101904", "tracking": { "current_release_date": "2026-10-10T15:32:03.981241Z", "generator": { "date": "2026-02-17T15:00:00Z", "engine": { "name": "V.E.L.M.A", "version": "1.7" } }, "id": "CVE-2026-101904", "initial_release_date": "2026-09-28T17:38:30.956063Z", "revision_history": [ { "date": "2026-09-28T17:38:30.956063Z", "number": "1", "summary": "CVSS created.| CWES created (2).| Products created (1).| References created (4).| Description created for source.| Unknown change." }, { "date": "2026-09-28T17:38:31.975447Z", "number": "2", "summary": "NCSC Score created." }, { "date": "2026-09-28T18:28:30.828350Z", "number": "3", "summary": "Source created.| CVE status created. (valid)| Description created for source.| CVSS created.| References created (4).| CWES updated (1)." }, { "date": "2026-09-28T18:28:40.766870Z", "number": "4", "summary": "NCSC Score updated." }, { "date": "2026-09-28T18:38:42.514405Z", "number": "5", "summary": "Unknown change." }, { "date": "2026-09-29T06:12:32.036731Z", "number": "6", "summary": "Source created.| CVE status created. (valid)| Description created for source.| CVSS created.| Products connected (74).| References created (6).| CWES updated (1)." }, { "date": "2026-09-29T12:29:23.232143Z", "number": "7", "summary": "Source created.| CVE status created. (valid)| Description created for source.| CVSS created.| Products connected (5).| Product Identifiers created (1).| References created (6).| CWES updated (1).| Vendor_assessment created." }, { "date": "2026-09-29T12:29:28.081962Z", "number": "8", "summary": "NCSC Score updated." }, { "date": "2026-09-29T12:53:05.141358Z", "number": "9", "summary": "Source created.| CVE status created. (valid)| Description created for source.| Products connected (1)." }, { "date": "2026-09-29T12:53:21.586544Z", "number": "10", "summary": "NCSC Score updated." }, { "date": "2026-09-29T16:12:56.948691Z", "number": "11", "summary": "EPSS created.| Unknown change." }, { "date": "2026-09-29T16:13:03.052139Z", "number": "12", "summary": "NCSC Score updated." }, { "date": "2026-09-30T15:40:02.858175Z", "number": "13", "summary": "Source created.| CVE status created. (valid)| Description created for source.| CVSS created.| References created (6).| CWES updated (1)." }, { "date": "2026-09-30T15:40:12.554589Z", "number": "14", "summary": "NCSC Score updated." }, { "date": "2026-10-01T12:21:17.500806Z", "number": "15", "summary": "Source connected.| CVE status created. (valid)| Description created for source.| CWES updated (1)." }, { "date": "2026-10-01T12:21:25.581796Z", "number": "16", "summary": "NCSC Score updated." }, { "date": "2026-10-10T15:32:02.844794Z", "number": "17", "summary": "NCSC Score updated." } ], "status": "interim", "version": "17" } }, "product_tree": { "branches": [ { "branches": [ { "branches": [ { "category": "product_version_range", "name": "vers:unknown/1.2.0-alpha.1", "product": { "name": "vers:unknown/1.2.0-alpha.1", "product_id": "CSAFPID-3658038" } }, { "category": "product_version_range", "name": "vers:unknown/1.2.2", "product": { "name": "vers:unknown/1.2.2", "product_id": "CSAFPID-3129265" } }, { "category": "product_version_range", "name": "vers:unknown/>=1.0.0|<1.20.0", "product": { "name": "vers:unknown/>=1.0.0|<1.20.0", "product_id": "CSAFPID-9482811" } }, { "category": "product_version_range", "name": "vers:unknown/v1.0.0", "product": { "name": "vers:unknown/v1.0.0", "product_id": "CSAFPID-3658055" } }, { "category": "product_version_range", "name": "vers:unknown/v1.1.0", "product": { "name": "vers:unknown/v1.1.0", "product_id": "CSAFPID-3658057" } }, { "category": "product_version_range", "name": "vers:unknown/v1.1.1", "product": { "name": "vers:unknown/v1.1.1", "product_id": "CSAFPID-3658058" } }, { "category": "product_version_range", "name": "vers:unknown/v1.1.2", "product": { "name": "vers:unknown/v1.1.2", "product_id": "CSAFPID-3658059" } }, { "category": "product_version_range", "name": "vers:unknown/v1.1.3", "product": { "name": "vers:unknown/v1.1.3", "product_id": "CSAFPID-3658060" } }, { "category": "product_version_range", "name": "vers:unknown/v1.10.0", "product": { "name": "vers:unknown/v1.10.0", "product_id": "CSAFPID-3721220" } }, { "category": "product_version_range", "name": "vers:unknown/v1.11.0", "product": { "name": "vers:unknown/v1.11.0", "product_id": "CSAFPID-3721221" } }, { "category": "product_version_range", "name": "vers:unknown/v1.12.0", "product": { "name": "vers:unknown/v1.12.0", "product_id": "CSAFPID-5588483" } }, { "category": "product_version_range", "name": "vers:unknown/v1.12.1", "product": { "name": "vers:unknown/v1.12.1", "product_id": "CSAFPID-5588484" } }, { "category": "product_version_range", "name": "vers:unknown/v1.12.2", "product": { "name": "vers:unknown/v1.12.2", "product_id": "CSAFPID-5588485" } }, { "category": "product_version_range", "name": "vers:unknown/v1.13.0", "product": { "name": "vers:unknown/v1.13.0", "product_id": "CSAFPID-5588486" } }, { "category": "product_version_range", "name": "vers:unknown/v1.13.1", "product": { "name": "vers:unknown/v1.13.1", "product_id": "CSAFPID-5588487" } }, { "category": "product_version_range", "name": "vers:unknown/v1.13.2", "product": { "name": "vers:unknown/v1.13.2", "product_id": "CSAFPID-5588488" } }, { "category": "product_version_range", "name": "vers:unknown/v1.13.3", "product": { "name": "vers:unknown/v1.13.3", "product_id": "CSAFPID-5588489" } }, { "category": "product_version_range", "name": "vers:unknown/v1.13.4", "product": { "name": "vers:unknown/v1.13.4", "product_id": "CSAFPID-5588490" } }, { "category": "product_version_range", "name": "vers:unknown/v1.13.5", "product": { "name": "vers:unknown/v1.13.5", "product_id": "CSAFPID-8580145" } }, { "category": "product_version_range", "name": "vers:unknown/v1.13.6", "product": { "name": "vers:unknown/v1.13.6", "product_id": "CSAFPID-8580144" } }, { "category": "product_version_range", "name": "vers:unknown/v1.14.0", "product": { "name": "vers:unknown/v1.14.0", "product_id": "CSAFPID-8580143" } }, { "category": "product_version_range", "name": "vers:unknown/v1.15.0", "product": { "name": "vers:unknown/v1.15.0", "product_id": "CSAFPID-8580142" } }, { "category": "product_version_range", "name": "vers:unknown/v1.15.1", "product": { "name": "vers:unknown/v1.15.1", "product_id": "CSAFPID-8580141" } }, { "category": "product_version_range", "name": "vers:unknown/v1.15.2", "product": { "name": "vers:unknown/v1.15.2", "product_id": "CSAFPID-8583063" } }, { "category": "product_version_range", "name": "vers:unknown/v1.16.0", "product": { "name": "vers:unknown/v1.16.0", "product_id": "CSAFPID-8925641" } }, { "category": "product_version_range", "name": "vers:unknown/v1.16.1", "product": { "name": "vers:unknown/v1.16.1", "product_id": "CSAFPID-8925639" } }, { "category": "product_version_range", "name": "vers:unknown/v1.17.0", "product": { "name": "vers:unknown/v1.17.0", "product_id": "CSAFPID-8925638" } }, { "category": "product_version_range", "name": "vers:unknown/v1.18.0", "product": { "name": "vers:unknown/v1.18.0", "product_id": "CSAFPID-9484963" } }, { "category": "product_version_range", "name": "vers:unknown/v1.18.1", "product": { "name": "vers:unknown/v1.18.1", "product_id": "CSAFPID-9484962" } }, { "category": "product_version_range", "name": "vers:unknown/v1.19.0", "product": { "name": "vers:unknown/v1.19.0", "product_id": "CSAFPID-9484961" } }, { "category": "product_version_range", "name": "vers:unknown/v1.2.0", "product": { "name": "vers:unknown/v1.2.0", "product_id": "CSAFPID-3658061" } }, { "category": "product_version_range", "name": "vers:unknown/v1.2.1", "product": { "name": "vers:unknown/v1.2.1", "product_id": "CSAFPID-3658062" } }, { "category": "product_version_range", "name": "vers:unknown/v1.2.2", "product": { "name": "vers:unknown/v1.2.2", "product_id": "CSAFPID-3658063" } }, { "category": "product_version_range", "name": "vers:unknown/v1.2.3", "product": { "name": "vers:unknown/v1.2.3", "product_id": "CSAFPID-3658064" } }, { "category": "product_version_range", "name": "vers:unknown/v1.2.4", "product": { "name": "vers:unknown/v1.2.4", "product_id": "CSAFPID-3658065" } }, { "category": "product_version_range", "name": "vers:unknown/v1.2.5", "product": { "name": "vers:unknown/v1.2.5", "product_id": "CSAFPID-3658066" } }, { "category": "product_version_range", "name": "vers:unknown/v1.2.6", "product": { "name": "vers:unknown/v1.2.6", "product_id": "CSAFPID-3658067" } }, { "category": "product_version_range", "name": "vers:unknown/v1.3.0", "product": { "name": "vers:unknown/v1.3.0", "product_id": "CSAFPID-3658068" } }, { "category": "product_version_range", "name": "vers:unknown/v1.3.1", "product": { "name": "vers:unknown/v1.3.1", "product_id": "CSAFPID-3658069" } }, { "category": "product_version_range", "name": "vers:unknown/v1.3.2", "product": { "name": "vers:unknown/v1.3.2", "product_id": "CSAFPID-3636395" } }, { "category": "product_version_range", "name": "vers:unknown/v1.3.3", "product": { "name": "vers:unknown/v1.3.3", "product_id": "CSAFPID-3636396" } }, { "category": "product_version_range", "name": "vers:unknown/v1.3.4", "product": { "name": "vers:unknown/v1.3.4", "product_id": "CSAFPID-3636397" } }, { "category": "product_version_range", "name": "vers:unknown/v1.3.5", "product": { "name": "vers:unknown/v1.3.5", "product_id": "CSAFPID-3636398" } }, { "category": "product_version_range", "name": "vers:unknown/v1.3.6", "product": { "name": "vers:unknown/v1.3.6", "product_id": "CSAFPID-3636399" } }, { "category": "product_version_range", "name": "vers:unknown/v1.4.0", "product": { "name": "vers:unknown/v1.4.0", "product_id": "CSAFPID-3636400" } }, { "category": "product_version_range", "name": "vers:unknown/v1.5.0", "product": { "name": "vers:unknown/v1.5.0", "product_id": "CSAFPID-3636401" } }, { "category": "product_version_range", "name": "vers:unknown/v1.5.1", "product": { "name": "vers:unknown/v1.5.1", "product_id": "CSAFPID-3636402" } }, { "category": "product_version_range", "name": "vers:unknown/v1.6.0", "product": { "name": "vers:unknown/v1.6.0", "product_id": "CSAFPID-3636403" } }, { "category": "product_version_range", "name": "vers:unknown/v1.6.1", "product": { "name": "vers:unknown/v1.6.1", "product_id": "CSAFPID-3636404" } }, { "category": "product_version_range", "name": "vers:unknown/v1.6.2", "product": { "name": "vers:unknown/v1.6.2", "product_id": "CSAFPID-3636405" } }, { "category": "product_version_range", "name": "vers:unknown/v1.6.3", "product": { "name": "vers:unknown/v1.6.3", "product_id": "CSAFPID-3636406" } }, { "category": "product_version_range", "name": "vers:unknown/v1.6.4", "product": { "name": "vers:unknown/v1.6.4", "product_id": "CSAFPID-3636407" } }, { "category": "product_version_range", "name": "vers:unknown/v1.6.5", "product": { "name": "vers:unknown/v1.6.5", "product_id": "CSAFPID-3636408" } }, { "category": "product_version_range", "name": "vers:unknown/v1.6.6", "product": { "name": "vers:unknown/v1.6.6", "product_id": "CSAFPID-3636409" } }, { "category": "product_version_range", "name": "vers:unknown/v1.6.7", "product": { "name": "vers:unknown/v1.6.7", "product_id": "CSAFPID-3636410" } }, { "category": "product_version_range", "name": "vers:unknown/v1.6.8", "product": { "name": "vers:unknown/v1.6.8", "product_id": "CSAFPID-3636411" } }, { "category": "product_version_range", "name": "vers:unknown/v1.7.0", "product": { "name": "vers:unknown/v1.7.0", "product_id": "CSAFPID-3636412" } }, { "category": "product_version_range", "name": "vers:unknown/v1.7.0-beta.0", "product": { "name": "vers:unknown/v1.7.0-beta.0", "product_id": "CSAFPID-3636413" } }, { "category": "product_version_range", "name": "vers:unknown/v1.7.0-beta.1", "product": { "name": "vers:unknown/v1.7.0-beta.1", "product_id": "CSAFPID-3636414" } }, { "category": "product_version_range", "name": "vers:unknown/v1.7.0-beta.2", "product": { "name": "vers:unknown/v1.7.0-beta.2", "product_id": "CSAFPID-3636415" } }, { "category": "product_version_range", "name": "vers:unknown/v1.7.1", "product": { "name": "vers:unknown/v1.7.1", "product_id": "CSAFPID-3636416" } }, { "category": "product_version_range", "name": "vers:unknown/v1.7.2", "product": { "name": "vers:unknown/v1.7.2", "product_id": "CSAFPID-3636417" } }, { "category": "product_version_range", "name": "vers:unknown/v1.7.3", "product": { "name": "vers:unknown/v1.7.3", "product_id": "CSAFPID-3636418" } }, { "category": "product_version_range", "name": "vers:unknown/v1.7.4", "product": { "name": "vers:unknown/v1.7.4", "product_id": "CSAFPID-3658070" } }, { "category": "product_version_range", "name": "vers:unknown/v1.7.5", "product": { "name": "vers:unknown/v1.7.5", "product_id": "CSAFPID-3658071" } }, { "category": "product_version_range", "name": "vers:unknown/v1.7.6", "product": { "name": "vers:unknown/v1.7.6", "product_id": "CSAFPID-3658072" } }, { "category": "product_version_range", "name": "vers:unknown/v1.7.7", "product": { "name": "vers:unknown/v1.7.7", "product_id": "CSAFPID-3658073" } }, { "category": "product_version_range", "name": "vers:unknown/v1.7.8", "product": { "name": "vers:unknown/v1.7.8", "product_id": "CSAFPID-3721222" } }, { "category": "product_version_range", "name": "vers:unknown/v1.7.9", "product": { "name": "vers:unknown/v1.7.9", "product_id": "CSAFPID-3721223" } }, { "category": "product_version_range", "name": "vers:unknown/v1.8.0", "product": { "name": "vers:unknown/v1.8.0", "product_id": "CSAFPID-3721224" } }, { "category": "product_version_range", "name": "vers:unknown/v1.8.1", "product": { "name": "vers:unknown/v1.8.1", "product_id": "CSAFPID-3721225" } }, { "category": "product_version_range", "name": "vers:unknown/v1.8.2", "product": { "name": "vers:unknown/v1.8.2", "product_id": "CSAFPID-3721226" } }, { "category": "product_version_range", "name": "vers:unknown/v1.8.3", "product": { "name": "vers:unknown/v1.8.3", "product_id": "CSAFPID-3721227" } }, { "category": "product_version_range", "name": "vers:unknown/v1.8.4", "product": { "name": "vers:unknown/v1.8.4", "product_id": "CSAFPID-3721228" } }, { "category": "product_version_range", "name": "vers:unknown/v1.9.0", "product": { "name": "vers:unknown/v1.9.0", "product_id": "CSAFPID-3721229" } } ], "category": "product_name", "name": "Axios" } ], "category": "vendor", "name": "Axios" }, { "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-8902830" } } ], "category": "product_name", "name": "grafana12.4" }, { "branches": [ { "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/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-8476867" } } ], "category": "product_name", "name": "jaeger" } ], "category": "product_family", "name": "Red Hat Hardened Images" } ], "category": "vendor", "name": "Red Hat" }, { "branches": [ { "branches": [ { "branches": [ { "category": "product_version_range", "name": "vers:deb/unknown", "product": { "name": "vers:deb/unknown", "product_id": "CSAFPID-2434928" } } ], "category": "product_name", "name": "node-axios" } ], "category": "product_family", "name": "bookworm" } ], "category": "vendor", "name": "Debian" } ] }, "vulnerabilities": [ { "cve": "CVE-2026-101904", "cwe": { "id": "CWE-1321", "name": "Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution')" }, "notes": [ { "category": "description", "text": "Axios is a promise-based HTTP client for the browser and Node.js. From 1.0.0 until 1.20.0, the dispatchRequest function normalizes inherited Object.prototype.headers from a replacement request configuration. A separate same-process prototype-pollution flaw sets Object.prototype.headers, and trusted request interceptors return a new ordinary configuration without an own headers property. After the interceptor chain, dispatchRequest resolves the inherited headers during normalization. Downstream request processing can observe attacker-controlled headers, including authorization-related values. This issue is fixed in version 1.20.0.", "title": "cveprojectv5 - https://www.cve.org/CVERecord?id=CVE-2026-101904" }, { "category": "description", "text": "Axios is a promise-based HTTP client for the browser and Node.js. From 1.0.0 until 1.20.0, the dispatchRequest function normalizes inherited Object.prototype.headers from a replacement request configuration. A separate same-process prototype-pollution flaw sets Object.prototype.headers, and trusted request interceptors return a new ordinary configuration without an own headers property. After the interceptor chain, dispatchRequest resolves the inherited headers during normalization. Downstream request processing can observe attacker-controlled headers, including authorization-related values. This issue is fixed in version 1.20.0.", "title": "nvd - https://nvd.nist.gov/vuln/detail/CVE-2026-101904" }, { "category": "description", "text": "A flaw was found in Axios. If a separate vulnerability modifies shared object properties (prototype pollution) in the application environment, Axios may inherit those properties when processing request configurations rebuilt without explicit headers. An attacker can exploit this condition to inject unauthorized HTTP headers into outgoing network requests. This issue can lead to improper request routing, access control bypasses, or downstream cache poisoning.", "title": "redhat - https://access.redhat.com/security/cve/CVE-2026-101904" }, { "category": "description", "text": "Axios is a promise-based HTTP client for the browser and Node.js. From 1.0.0 until 1.20.0, the dispatchRequest function normalizes inherited Object.prototype.headers from a replacement request configuration. A separate same-process prototype-pollution flaw sets Object.prototype.headers, and trusted request interceptors return a new ordinary configuration without an own headers property. After the interceptor chain, dispatchRequest resolves the inherited headers during normalization. Downstream request processing can observe attacker-controlled headers, including authorization-related values. This issue is fixed in version 1.20.0.", "title": "debian - https://security-tracker.debian.org/tracker/CVE-2026-101904" }, { "category": "description", "text": "Axios is a promise-based HTTP client for the browser and Node.js. From 1.0.0 until 1.20.0, the dispatchRequest function normalizes inherited Object.prototype.headers from a replacement request configuration. A separate same-process prototype-pollution flaw sets Object.prototype.headers, and trusted request interceptors return a new ordinary configuration without an own headers property. After the interceptor chain, dispatchRequest resolves the inherited headers during normalization. Downstream request processing can observe attacker-controlled headers, including authorization-related values. This issue is fixed in version 1.20.0.", "title": "osvgit - https://www.googleapis.com/download/storage/v1/b/osv-vulnerabilities/o/GIT%2FCVE-2026-101904.json?alt=media" }, { "category": "description", "text": "## Summary\n\nAxios request interceptors may return a replacement config object. If an interceptor returns a plain object without an own `headers` property, `dispatchRequest()` later evaluates `config.headers` and can resolve an inherited `Object.prototype.headers` value. In a process where another vulnerability has polluted `Object.prototype.headers`, axios can send attacker-controlled headers.\n\nAxios does not create the prototype pollution source, and the interceptor itself is trusted caller code. The vulnerable behavior is the post-interceptor axios config read that reopens a prototype-pollution gadget after earlier null-prototype config hardening.\n\n## Impact\n\nAn attacker with a prior same-process prototype-pollution primitive can inject headers into affected axios requests when the application uses an interceptor that rebuilds config and omits headers. Depending on the target service, injected headers can affect cache behavior, conditional requests, metadata services, or application-specific authorization and routing logic.\n\nThe issue is conditional and should not be described as affecting every interceptor or every request.\n\n## Affected Functionality\n\nAffected:\n\n- Request interceptor chains where an interceptor returns a new ordinary object.\n- Replacement config objects that omit an own `headers` property.\n- `dispatchRequest()` header normalization through `AxiosHeaders.from(config.headers)`.\n\nNot affected:\n\n- Requests whose interceptor preserves an own `headers` property.\n- Interceptors that mutate and return the existing null-prototype config.\n- Processes without prototype pollution.\n\n## Technical Details\n\n`lib/core/dispatchRequest.js` contains:\n\n```js\nconfig.headers = AxiosHeaders.from(config.headers);\n```\n\nThe initial merged config is null-prototype, but an interceptor can replace it with a normal object. If that object has no own `headers`, the read can resolve `Object.prototype.headers`.\n\nLocal verification on axios `1.18.1` polluted `Object.prototype.headers = { 'X-Poisoned': 'yes' }`, installed an interceptor that returned `{ url, method, timeout, proxy: false }`, and sent a request. The loopback server received `X-Poisoned: yes`.\n\n## Proof of Concept of Attack\n\nConstrained local demonstration:\n\n```js\nObject.prototype.headers = { 'X-Poisoned': 'yes' };\n\nconst client = axios.create();\nclient.interceptors.request.use((config) => ({\n url: config.url,\n method: config.method,\n timeout: config.timeout\n}));\n\nawait client.get(url);\n```\n\nExpected safe behavior is that missing headers normalize to an empty header set. Current affected behavior reads inherited `Object.prototype.headers`.\n\n## Workarounds\n\nInterceptors that rebuild config should always set an own `headers` property, for example by preserving `config.headers` or setting `headers: {}`. Mutating and returning the existing merged config also avoids replacing the null-prototype object.\n\n
\n

Original report

\n \n\n## Summary\n\nAxios 1.17.0 blocks the old `Object.prototype.common` header bucket gadget. However, if a request interceptor rebuilds a minimal config object and omits `headers`, `dispatchRequest()` reads inherited `Object.prototype.headers`.\n\nThis allows attacker-controlled headers to be placed on the wire.\n\n## Affected Version\n\nValidated on:\n\n- axios: `1.17.0`\n- commit: `4306df2`\n- runtime: Node.js `v24.15.0`\n\n## Preconditions\n\n- A separate prototype-pollution primitive can write an object to `Object.prototype.headers`.\n- A request interceptor rebuilds config and omits own `headers`.\n\n## Root Cause\n\n`dispatchRequest()` uses:\n\n```js\nconfig.headers = AxiosHeaders.from(config.headers);\n```\n\nIf `config` is a normal object returned by an interceptor and lacks own `headers`, this reads `Object.prototype.headers`.\n\n## Impact\n\nAn attacker can inject request headers. Depending on the target service, this can cause cache manipulation, conditional-response suppression, request smuggling preconditions, metadata-service header injection, or application-specific authorization bypass.\n\n## Proof of Concept\n\n```js\nimport axios from './index.js';\nimport http from 'http';\n\nconst start = (handler) => new Promise((resolve) => {\n const server = http.createServer(handler);\n server.listen(0, '127.0.0.1', () => resolve(server));\n});\n\nconst stop = (server) => new Promise((resolve) => server.close(resolve));\n\nconst hits = [];\n\nconst server = await start((req, res) => {\n hits.push(req.headers);\n res.setHeader('Content-Type', 'application/json');\n res.end('{\"ok\":true}');\n});\n\ntry {\n Object.prototype.headers = {\n 'X-Poisoned': 'yes',\n 'If-None-Match': '*'\n };\n\n const client = axios.create();\n client.interceptors.request.use((config) => ({\n url: config.url,\n method: config.method,\n timeout: config.timeout\n }));\n\n await client.get(`http://127.0.0.1:${server.address().port}/headers`, {\n timeout: 3000\n });\n\n console.log(hits[0]);\n} finally {\n delete Object.prototype.headers;\n await stop(server);\n}\n```\n\nObserved wire headers:\n\n```json\n{\n \"x-poisoned\": \"yes\",\n \"if-none-match\": \"*\",\n \"user-agent\": \"axios/1.17.0\"\n}\n```\n\n## References\n\n- https://github.com/axios/axios/security/advisories/GHSA-898c-q2cr-xwhg\n- https://osv.dev/vulnerability/GHSA-898c-q2cr-xwhg\n
\n---", "title": "github - https://github.com/advisories/GHSA-j8rh-479h-cp32" }, { "category": "description", "text": "Axios: Header Injection via Inherited headers After Minimal Interceptor", "title": "microsoft - https://api.msrc.microsoft.com/cvrf/v3.0/cvrf/2026-Sep" }, { "category": "other", "text": "0.00428", "title": "EPSS" }, { "category": "other", "text": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:N/SC:L/SI:H/SA:N", "title": "CVSSV4" }, { "category": "other", "text": "6.9", "title": "CVSSV4 base score" }, { "category": "other", "text": "3.8", "title": "NCSC Score" }, { "category": "other", "text": "The CVSS vector string contains AV:N (Attack Vector: Network), Is related to CWE-1321 (Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution'))", "title": "NCSC Score top decreasing factors" }, { "category": "details", "text": "Severity: 2\n", "title": "Vendor assessment" } ], "product_status": { "known_affected": [ "CSAFPID-9482811", "CSAFPID-6014972", "CSAFPID-8902830", "CSAFPID-8902831", "CSAFPID-9053231", "CSAFPID-2434928", "CSAFPID-3658038", "CSAFPID-3129265", "CSAFPID-3658055", "CSAFPID-3658057", "CSAFPID-3658058", "CSAFPID-3658059", "CSAFPID-3658060", "CSAFPID-3721220", "CSAFPID-3721221", "CSAFPID-5588483", "CSAFPID-5588484", "CSAFPID-5588485", "CSAFPID-5588486", "CSAFPID-5588487", "CSAFPID-5588488", "CSAFPID-5588489", "CSAFPID-5588490", "CSAFPID-8580145", "CSAFPID-8580144", "CSAFPID-8580143", "CSAFPID-8580142", "CSAFPID-8580141", "CSAFPID-8583063", "CSAFPID-8925641", "CSAFPID-8925639", "CSAFPID-8925638", "CSAFPID-9484963", "CSAFPID-9484962", "CSAFPID-9484961", "CSAFPID-3658061", "CSAFPID-3658062", "CSAFPID-3658063", "CSAFPID-3658064", "CSAFPID-3658065", "CSAFPID-3658066", "CSAFPID-3658067", "CSAFPID-3658068", "CSAFPID-3658069", "CSAFPID-3636395", "CSAFPID-3636396", "CSAFPID-3636397", "CSAFPID-3636398", "CSAFPID-3636399", "CSAFPID-3636400", "CSAFPID-3636401", "CSAFPID-3636402", "CSAFPID-3636403", "CSAFPID-3636404", "CSAFPID-3636405", "CSAFPID-3636406", "CSAFPID-3636407", "CSAFPID-3636408", "CSAFPID-3636409", "CSAFPID-3636410", "CSAFPID-3636411", "CSAFPID-3636412", "CSAFPID-3636413", "CSAFPID-3636414", "CSAFPID-3636415", "CSAFPID-3636416", "CSAFPID-3636417", "CSAFPID-3636418", "CSAFPID-3658070", "CSAFPID-3658071", "CSAFPID-3658072", "CSAFPID-3658073", "CSAFPID-3721222", "CSAFPID-3721223", "CSAFPID-3721224", "CSAFPID-3721225", "CSAFPID-3721226", "CSAFPID-3721227", "CSAFPID-3721228", "CSAFPID-3721229" ], "known_not_affected": [ "CSAFPID-8476867" ] }, "references": [ { "category": "external", "summary": "Source - nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-101904" }, { "category": "external", "summary": "Source - ncscclear", "url": "https://vulnerabilities.ncsc.nl/manual/CVE-2026-101904" }, { "category": "external", "summary": "Source - cveprojectv5", "url": "https://www.cve.org/CVERecord?id=CVE-2026-101904" }, { "category": "external", "summary": "Source - redhat", "url": "https://access.redhat.com/security/cve/CVE-2026-101904" }, { "category": "external", "summary": "Source - debian", "url": "https://security-tracker.debian.org/tracker/CVE-2026-101904" }, { "category": "external", "summary": "Source - first", "url": "https://api.first.org/data/v1/epss" }, { "category": "external", "summary": "Source - github", "url": "https://github.com/advisories/GHSA-j8rh-479h-cp32" }, { "category": "external", "summary": "Source - microsoft", "url": "https://api.msrc.microsoft.com/cvrf/v3.0/cvrf/2026-Sep" }, { "category": "external", "summary": "Source - osv", "url": "https://www.googleapis.com/download/storage/v1/b/osv-vulnerabilities/o/GIT%2FCVE-2026-101904.json?alt=media" }, { "category": "external", "summary": "Reference - cveprojectv5; github; nvd; osv; redhat", "url": "https://github.com/axios/axios/commit/d19040bda7a8be2f82c3c6e1a5bc03917daee39a" }, { "category": "external", "summary": "Reference - cveprojectv5; github; nvd; osv; redhat", "url": "https://github.com/axios/axios/pull/11141" }, { "category": "external", "summary": "Reference - cveprojectv5; github; nvd; osv; redhat", "url": "https://github.com/axios/axios/releases/tag/v1.20.0" }, { "category": "external", "summary": "Reference - cveprojectv5; github; nvd; osv; redhat", "url": "https://github.com/axios/axios/security/advisories/GHSA-j8rh-479h-cp32" }, { "category": "external", "summary": "Reference - redhat", "url": "https://www.cve.org/CVERecord?id=CVE-2026-101904" }, { "category": "external", "summary": "Reference - github; osv; redhat", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-101904" }, { "category": "external", "summary": "Reference - github", "url": "https://github.com/advisories/GHSA-j8rh-479h-cp32" }, { "category": "external", "summary": "Reference - osv", "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/101xxx/CVE-2026-101904.json" } ], "scores": [ { "cvss_v3": { "version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:H/A:N", "baseScore": 6.5, "baseSeverity": "MEDIUM" }, "products": [ "CSAFPID-2434928", "CSAFPID-3129265", "CSAFPID-3636395", "CSAFPID-3636396", "CSAFPID-3636397", "CSAFPID-3636398", "CSAFPID-3636399", "CSAFPID-3636400", "CSAFPID-3636401", "CSAFPID-3636402", "CSAFPID-3636403", "CSAFPID-3636404", "CSAFPID-3636405", "CSAFPID-3636406", "CSAFPID-3636407", "CSAFPID-3636408", "CSAFPID-3636409", "CSAFPID-3636410", "CSAFPID-3636411", "CSAFPID-3636412", "CSAFPID-3636413", "CSAFPID-3636414", "CSAFPID-3636415", "CSAFPID-3636416", "CSAFPID-3636417", "CSAFPID-3636418", "CSAFPID-3658038", "CSAFPID-3658055", "CSAFPID-3658057", "CSAFPID-3658058", "CSAFPID-3658059", "CSAFPID-3658060", "CSAFPID-3658061", "CSAFPID-3658062", "CSAFPID-3658063", "CSAFPID-3658064", "CSAFPID-3658065", "CSAFPID-3658066", "CSAFPID-3658067", "CSAFPID-3658068", "CSAFPID-3658069", "CSAFPID-3658070", "CSAFPID-3658071", "CSAFPID-3658072", "CSAFPID-3658073", "CSAFPID-3721220", "CSAFPID-3721221", "CSAFPID-3721222", "CSAFPID-3721223", "CSAFPID-3721224", "CSAFPID-3721225", "CSAFPID-3721226", "CSAFPID-3721227", "CSAFPID-3721228", "CSAFPID-3721229", "CSAFPID-5588483", "CSAFPID-5588484", "CSAFPID-5588485", "CSAFPID-5588486", "CSAFPID-5588487", "CSAFPID-5588488", "CSAFPID-5588489", "CSAFPID-5588490", "CSAFPID-6014972", "CSAFPID-8580141", "CSAFPID-8580142", "CSAFPID-8580143", "CSAFPID-8580144", "CSAFPID-8580145", "CSAFPID-8583063", "CSAFPID-8902830", "CSAFPID-8902831", "CSAFPID-8925638", "CSAFPID-8925639", "CSAFPID-8925641", "CSAFPID-9053231", "CSAFPID-9482811", "CSAFPID-9484961", "CSAFPID-9484962", "CSAFPID-9484963" ] } ], "title": "CVE-2026-101904" } ] }