AIKIDO-2026-272962
libcurl is vulnerable to Use After Free
37
Low Risk
This Affects:
libcurlTL;DR
HTTP/2 server push on a handle that shares its connection cache with other handles frees a pushed stream during cleanup. Cleanup then uses that stream after the free, which can crash the process. The fix releases push streams while their parent structures are still valid.
Who does this affect?
You are affected if you are using a version that falls within the vulnerable range and you share connections across handles and accept HTTP/2 server push.
Background info
libcurl is vulnerable to Use After Free in versions 7.44.0 - 8.21.0.
How to fix this
Upgrade the libcurl and/or the curl.curl library to the patch version.
Links
GitHub Release
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