AIKIDO-2026-968357
undici is vulnerable to Insufficient Verification of Data Authenticity
37
Low Risk
This Affects:
undiciTL;DR
The cache interceptor is documented to cache only safe HTTP methods, but its skip list is built by subtracting configured methods from the safe-method set, so POST, PUT, PATCH, and DELETE still hit the cache. Combined with a storage gate that does not check the method, a cacheable response to an unsafe request is stored and replayed, and the state-changing request never reaches the origin. The fix stops reading from or writing to the cache for unsafe methods.
Who does this affect?
You are affected if you are using a version that falls within the vulnerable range and you use interceptors.cache().
Background info
undici is vulnerable to Insufficient Verification of Data Authenticity 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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