CVE-2026-10536 — HTTP/2 stream-dependency tree UAF

Description (CNA)

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.

Affected (CNA)

Vendor / product	Versions
curl / curl	affected 7.88.0 before 8.14.2; affected 8.15.0 before 8.16.1; affected 8.17.0 before 8.20.1
curl / curl	affected 71b7e0161032927cdfb4e75ea40f65b8898b3956 before bfbff7852f050232edd3e5ca5c6bf2021c340f5a
curl / curl	affected 8.20.0; affected 8.19.0; affected 8.18.0; affected 8.17.0; affected 8.16.0; affected 8.15.0; affected 8.14.1; affected 8.14.0; affected 8.13.0; affected 8.12.1; affected 8.12.0; affected 8.11.1; affected 8.11.0; affected 8.10.1; affected 8.10.0; affected 8.9.1; affected 8.9.0; affected 8.8.0; affected 8.7.1; affected 8.7.0; affected 8.6.0; affected 8.5.0; affected 8.4.0; affected 8.3.0; affected 8.2.1; affected 8.2.0; affected 8.1.2; affected 8.1.1; affected 8.1.0; affected 8.0.1; affected 8.0.0; affected 7.88.1; affected 7.88.0

CWE

CWE-416

References

ADP enrichment

CISA-ADP

No English description supplied.

https://hackerone.com/reports/3751697