Description
Privilege escalation due to use-after-free in the Graphics: Canvas2D component. This vulnerability was fixed in Firefox 154, Firefox ESR 140.14, Firefox ESR 153.1, Thunderbird 154, Thunderbird 140.14, and Thunderbird 153.1.
Published: 2026-08-18
Score: 8.8 High
EPSS: n/a
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, 18 Aug 2026 19:00:00 +0000

Type Values Removed Values Added
Description Privilege escalation due to use-after-free in the Graphics: Canvas2D component. This vulnerability was fixed in Firefox 154, Firefox ESR 140.14, and Firefox ESR 153.1. Privilege escalation due to use-after-free in the Graphics: Canvas2D component. This vulnerability was fixed in Firefox 154, Firefox ESR 140.14, Firefox ESR 153.1, Thunderbird 154, Thunderbird 140.14, and Thunderbird 153.1.
References

Tue, 18 Aug 2026 16:30:00 +0000

Type Values Removed Values Added
Metrics cvssV3_1

{'score': 8.8, 'vector': 'CVSS:3.1/AV:N/AC:L/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, 18 Aug 2026 14:30:00 +0000

Type Values Removed Values Added
First Time appeared Mozilla
Mozilla firefox
Weaknesses CWE-416
Vendors & Products Mozilla
Mozilla firefox

Tue, 18 Aug 2026 12:45:00 +0000

Type Values Removed Values Added
Description Privilege escalation due to use-after-free in the Graphics: Canvas2D component. This vulnerability was fixed in Firefox 154, Firefox ESR 140.14, and Firefox ESR 153.1.
Title Privilege escalation due to use-after-free in the Graphics: Canvas2D component
References

cve-icon MITRE

Status: PUBLISHED

Assigner: mozilla

Published:

Updated: 2026-08-18T18:55:07.650Z

Reserved: 2026-08-17T11:57:57.441Z

Link: CVE-2026-74949

cve-icon Vulnrichment

Updated: 2026-08-18T15:34:56.228Z

cve-icon NVD

Status : Undergoing Analysis

Published: 2026-08-18T13:17:31.683

Modified: 2026-08-18T19:17:08.643

Link: CVE-2026-74949

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-08-18T19:30:04Z

Weaknesses