CVE-2026-4684 - Vulnerability Details - OpenCVE

Race condition, use-after-free in the Graphics: WebRender component. This vulnerability affects Firefox < 149, Firefox ESR < 115.34, and Firefox ESR < 140.9.

No CVSS v4.0

Attack Vector Network

Attack Complexity High

Privileges Required None

Scope Unchanged

Confidentiality Impact High

Integrity Impact High

Availability Impact High

User Interaction Required

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

No EPSS score available.

Exploitation none

Automatable no

Technical Impact total

No data.

No data.

No data.

No data.

References

Link	Providers
https://bugzilla.mozilla.org/show_bug.cgi?id=2011129
https://www.mozilla.org/security/advisories/mfsa2026-20/
https://www.mozilla.org/security/advisories/mfsa2026-21/
https://www.mozilla.org/security/advisories/mfsa2026-22/

History

Tue, 24 Mar 2026 15:15:00 +0000

Type	Values Removed	Values Added
Weaknesses		CWE-362 CWE-416
Metrics		cvssV3_1 `{'score': 7.5, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H'}` ssvc `{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}`

Tue, 24 Mar 2026 12:45:00 +0000

Type	Values Removed	Values Added
Description		Race condition, use-after-free in the Graphics: WebRender component. This vulnerability affects Firefox < 149, Firefox ESR < 115.34, and Firefox ESR < 140.9.
Title		Race condition, use-after-free in the Graphics: WebRender component
References		https://bugzilla.mozilla.org/show_bug.cgi?id=2011129 https://www.mozilla.org/security/advisories/mfsa2026-20/ https://www.mozilla.org/security/advisories/mfsa2026-21/ https://www.mozilla.org/security/advisories/mfsa2026-22/

MITRE

Status: PUBLISHED

Assigner: mozilla

Published: 2026-03-24T12:30:20.420Z

Updated: 2026-03-24T14:13:41.950Z

Reserved: 2026-03-23T23:21:29.581Z

Link: CVE-2026-4684

Vulnrichment

Updated: 2026-03-24T14:09:21.432Z

NVD

Status : Received

Published: 2026-03-24T13:16:04.210

Modified: 2026-03-24T15:16:38.050

Link: CVE-2026-4684

Redhat

No data.

OpenCVE Enrichment

No data.

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