AIKIDO-2026-426351
undici is vulnerable to Information Disclosure
65
CVE Score
Medium
Information Disclosure
TL;DR
The cache interceptor in shared mode, the default, stores and replays responses that carry Set-Cookie. A later caller that hits the same cache key receives another caller's cookie, and an untrusted upstream can inject cookies into cached responses served to every subsequent caller. Private caches are not affected. The fix refuses to store or re-serve Set-Cookie responses in shared-cache mode.
How do I fix this?
Upgrade the undici library to the patch version.
Who does this affect?
You are affected if you are using a version that falls within the vulnerable range and you use interceptors.cache() in shared mode.
Package
Versions
7.0.0 - 7.29.0
Fixed in 7.29.18.0.0 - 8.10.1
Fixed in 8.10.2Background info
undici is vulnerable to Information Disclosure in versions 7.0.0 - 7.29.0 and 8.0.0 - 8.10.1.
Links
GitHub Release
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