CVE-2026-85008
Vulnerability Summary
Timeline
Description
undici's cache interceptor documents that only safe HTTP methods are cached, but its logic to skip caching is built by subtracting the configured methods from the set of safe methods, so an unsafe method such as POST, PUT, or DELETE is never placed in the skip list and instead falls through to the full cache-read path. The response-storage gate also lacked a method check, so a response to an unsafe request that is heuristically cacheable or carries an explicit Cache-Control directive is stored and later replayed from cache. Because response headers from a remote origin are untrusted, an origin can answer once with a cacheable status and then have the client's own subsequent state-changing requests to that path served from the stale cache entry without ever reaching the origin, an integrity failure that occurs under the interceptor's default configuration. This affects undici versions from 7.0.0 up to 7.29.1 and from 8.0.0 up to 8.10.2. Users should upgrade to undici 7.29.1 or 8.10.2.
CVSS Metrics
- v3.1•LOW•Score: 3.7CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N
- v3.1•MEDIUM•Score: 5.3CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
EPSS Trends
Current EPSS score: 0.12%• Percentile: 2%
Techniques & Countermeasures
- CWE-345•Insufficient Verification of Data Authenticity
The product does not sufficiently verify the origin or authenticity of data, in a way that causes it to accept invalid data.
Affected Systems
- chainguard•node-gyp
all | < 13.0.2-r1
- wolfi•node-gyp
all | < 13.0.2-r1
- debian•node-undici
all | all | all | < 8.10.2+dfsg+~cs3.2.2-1
- ubuntu•node-undici
all | all
- nodejs•undici
≥ 7.0.0, < 7.29.1 | ≥ 8.0.0, < 8.10.2
- undici•undici
≥ 7.0.0, < 7.29.1 | ≥ 8.0.0, < 8.10.2