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

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions
Mozilla Firefox affected
Version Status Constraints
unspecified affected < 149
Mozilla Firefox ESR affected
Version Status Constraints
unspecified affected < 115.34
Mozilla Firefox ESR affected
Version Status Constraints
unspecified affected < 140.9

No data.

No data.

No data.

Project Subscriptions

No data.

Advisories

No advisories yet.

Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

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

Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: mozilla

Published:

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

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

Link: CVE-2026-4684

cve-icon Vulnrichment

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

cve-icon NVD

Status : Received

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

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

Link: CVE-2026-4684

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

No data.

Weaknesses