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.

Related CPE's


Vulnerable

References




https://hackerone.com/reports/3751697

ExploitIssue TrackingThird Party Advisory

https://hackerone.com/reports/3751697

ExploitIssue TrackingThird Party Advisory

Weaknesses


2499f714-1537-4658-8207-48ae4bb9eae9

Secondary

CWE-416


CWE-416

CVSS impact metrics


CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

9.8 · Critical

Information


Source identifier

2499f714-1537-4658-8207-48ae4bb9eae9

Vulnerability status

Modified

Published

2026-07-03T07:16:23.563Z

3 months ago

Last modified

2026-09-15T07:16:25.137Z

3 weeks ago