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JLSEC-2026-1197 Critical 9.8

A use-after-free vulnerability exists in libcurl when an application configures an HTTP/2 stream...

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JLSEC Published
Modified
Severity
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Affected Packages
CURL_jll >= 8.5.0+0, < 8.21.0+0
LibCURL_jll >= 7.88.1+0, < 8.21.0+0
Upstream
CVE-2026-10536 GHSA-wjq8-x4qm-6mmh EUVD-2026-41497

A use-after-free vulnerability exists in libcurl when an application configures an HTTP/2 stream-dependency tree via CURLOPT_STREAM_DEPENDS or CURLOPT_STREAM_DEPENDS_E, subsequently invokes curl_easy_reset(), and finally terminates the handle with curl_easy_cleanup(). During this final cleanup phase, libcurl attempts to access and modify an internal structure that was already freed during the reset operation.

References