AIKIDO-2026-908514
libcurl is vulnerable to Use After Free
37
Low Risk
This Affects:
libcurlTL;DR
An application that builds an HTTP/2 stream dependency tree with CURLOPT_STREAM_DEPENDS or CURLOPT_STREAM_DEPENDS_E, then calls curl_easy_reset() and curl_easy_cleanup(), hits a use-after-free. Cleanup writes through a structure that reset already freed, which can crash the process or corrupt memory. The fix removes stream dependency tracking.
Who does this affect?
You are affected if you are using a version that falls within the vulnerable range and you set HTTP/2 stream dependencies and then reset the easy handle.
Background info
libcurl is vulnerable to Use After Free in versions 7.88.0 - 8.20.0.
How to fix this
Upgrade the libcurl and/or the curl.curl library to the patch version.
Links
GitHub Release
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