AIKIDO-2026-426351
undici is vulnerable to Information Disclosure
65
Medium Risk
This Affects:
undiciTL;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.
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.
Background info
undici is vulnerable to Information Disclosure in versions 7.0.0 - 7.29.0 and 8.0.0 - 8.10.1.
How to fix this
Upgrade the undici library to the patch version.
Links
GitHub Release
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