Description
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.
Problem types
Product status
8.20.0 (semver)
8.19.0 (semver)
8.18.0 (semver)
8.17.0 (semver)
8.16.0 (semver)
8.15.0 (semver)
8.14.1 (semver)
8.14.0 (semver)
8.13.0 (semver)
8.12.1 (semver)
8.12.0 (semver)
8.11.1 (semver)
8.11.0 (semver)
8.10.1 (semver)
8.10.0 (semver)
8.9.1 (semver)
8.9.0 (semver)
8.8.0 (semver)
8.7.1 (semver)
8.7.0 (semver)
8.6.0 (semver)
8.5.0 (semver)
8.4.0 (semver)
8.3.0 (semver)
8.2.1 (semver)
8.2.0 (semver)
8.1.2 (semver)
8.1.1 (semver)
8.1.0 (semver)
8.0.1 (semver)
8.0.0 (semver)
7.88.1 (semver)
7.88.0 (semver)
Credits
Joshua Rogers (Aisle Research)
Stefan Eissing
References
hackerone.com/reports/3751697
curl.se/docs/CVE-2026-10536.json (json)
curl.se/docs/CVE-2026-10536.html (www)
hackerone.com/reports/3751697 (issue)