AIKIDO-2026-633281
undici is vulnerable to Denial of Service (DoS)
59
CVE Score
Medium
Denial of Service (DoS)
TL;DR
The decompress interceptor decompresses response bodies according to the untrusted Content-Encoding header and caps the number of layers but not the total decompressed output size. A small compressed payload can expand without bound in client memory and stall or crash the process. The fix adds a maxSize limit and rejects responses that exceed it.
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.decompress().
Package
Versions
7.15.0 - 7.29.0
Fixed in 7.29.18.0.0 - 8.10.1
Fixed in 8.10.2Background info
undici is vulnerable to Denial of Service (DoS) in versions 7.15.0 - 7.29.0 and 8.0.0 - 8.10.1.
Links
GitHub Release
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