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.
Published: 2026-07-03
Score: 9.8 Critical
EPSS: < 1% Very Low
KEV: No
Impact: n/a
Action: n/a
AI Analysis

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Remediation

No vendor fix or workaround currently provided.

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Tracking

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Advisories

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History

Tue, 07 Jul 2026 20:00:00 +0000

Type Values Removed Values Added
Weaknesses CWE-416

Tue, 07 Jul 2026 08:30:00 +0000

Type Values Removed Values Added
Weaknesses CWE-416

Mon, 06 Jul 2026 19:30:00 +0000

Type Values Removed Values Added
Metrics cvssV3_1

{'score': 9.8, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H'}

ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'poc', 'Technical Impact': 'total'}, 'version': '2.0.3'}


Mon, 06 Jul 2026 10:30:00 +0000

Type Values Removed Values Added
Weaknesses CWE-416

Mon, 06 Jul 2026 04:45:00 +0000

Type Values Removed Values Added
Weaknesses CWE-416

Sun, 05 Jul 2026 17:30:00 +0000

Type Values Removed Values Added
Weaknesses CWE-416

Sun, 05 Jul 2026 09:15:00 +0000

Type Values Removed Values Added
Weaknesses CWE-416

Sun, 05 Jul 2026 01:15:00 +0000

Type Values Removed Values Added
Weaknesses CWE-416

Sat, 04 Jul 2026 12:45:00 +0000

Type Values Removed Values Added
Weaknesses CWE-416

Sat, 04 Jul 2026 05:15:00 +0000

Type Values Removed Values Added
Weaknesses CWE-416

Fri, 03 Jul 2026 21:00:00 +0000

Type Values Removed Values Added
Weaknesses CWE-416

Fri, 03 Jul 2026 13:30:00 +0000

Type Values Removed Values Added
Weaknesses CWE-416

Fri, 03 Jul 2026 08:30:00 +0000

Type Values Removed Values Added
First Time appeared Curl
Curl curl
Vendors & Products Curl
Curl curl

Fri, 03 Jul 2026 06:45:00 +0000

Type Values Removed Values Added
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.
Title HTTP/2 stream-dependency tree UAF
References

cve-icon MITRE

Status: PUBLISHED

Assigner: curl

Published:

Updated: 2026-07-06T18:29:27.171Z

Reserved: 2026-06-01T11:49:55.548Z

Link: CVE-2026-10536

cve-icon Vulnrichment

Updated: 2026-07-06T18:29:23.421Z

cve-icon NVD

No data.

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-07-07T19:45:14Z

Weaknesses