GHSA-8436-99hf-9mmv
Suggest an improvement- Source
- https://github.com/advisories/GHSA-8436-99hf-9mmv
- Import Source
- https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/09/GHSA-8436-99hf-9mmv/GHSA-8436-99hf-9mmv.json
- JSON Data
- https://api.osv.dev/v1/vulns/GHSA-8436-99hf-9mmv
- Aliases
- Published
- 2026-09-29T18:16:28Z
- Modified
- 2026-09-29T18:28:12Z
- Severity
-
- 3.7 (Low) CVSS_V3 - CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N CVSS Calculator
- Summary
- undici vulnerable to caching and replay of unsafe HTTP method responses
- Details
-
Impact
undici's
interceptors.cache()documents that it caches only safe HTTP methods. However, its internal skip-list is built by subtracting the configured methods from the safe-methods set, so an unsafe method (POST,PUT,PATCH,DELETE) never lands in the skip-list and is looked up against the cache store. Combined with the storage gate (canCacheResponse) having no method check, a heuristically-cacheable response (for example a404) with an explicitCache-Control: max-age=...to an unsafe method is stored and replayed on a subsequent identical request. The application's state-changing request never reaches the origin, and undici serves a fabricated response from the cache instead. This occurs with the default configuration (methods: ['GET']), which the public API does not allow widening to unsafe methods, so no application misuse is required; an untrusted origin can trigger it purely through its own response headers.Patches
Upgrade to
7.29.1or8.10.2. The cache interceptor no longer reads from or writes to the cache for unsafe HTTP methods, while still invalidating existing cache entries on successful unsafe requests.Workarounds
None.
- Database specific
{ "cwe_ids": [ "CWE-345" ], "github_reviewed": true, "github_reviewed_at": "2026-09-29T18:16:28Z", "nvd_published_at": "2026-09-04T17:17:02Z", "severity": "LOW" }- References
-
- https://github.com/nodejs/undici/security/advisories/GHSA-8436-99hf-9mmv
- https://nvd.nist.gov/vuln/detail/CVE-2026-85008
- https://github.com/nodejs/undici/commit/2be07bf97b3022e0324142d31f99f6e019d815e3
- https://github.com/nodejs/undici/commit/b61d9432bac7caac51273ad209862e4c0bf935ae
- https://cna.openjsf.org/security-advisories.html
- https://github.com/nodejs/undici
- https://github.com/nodejs/undici/releases/tag/v7.29.1
- https://github.com/nodejs/undici/releases/tag/v8.10.2
Affected packages
npm / undici
Package
- Name
- undici
- View open source insights on deps.dev
- Purl
- pkg:npm/undici
npm / undici
Package
- Name
- undici
- View open source insights on deps.dev
- Purl
- pkg:npm/undici