VULNERABILITY INTELLIGENCE

CVE-2026-74940

CVSS score9.8 CRITICAL

EPSS probability0.61%

CISA KEVNot currently listed

Published2026-08-18

Last modified2026-08-21

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

Description

Use-after-free in the Graphics: Text component. This vulnerability was fixed in Firefox 154, Firefox ESR 115.39, Firefox ESR 140.14, Firefox ESR 153.1, Thunderbird 154, Thunderbird 140.14, and Thunderbird 153.1.

Weakness classification

nvd@nist.gov: CWE-416
134c704f-9b21-4f2e-91b3-4a467353bcc0: CWE-416

Primary references

security@mozilla.org — Permissions Required
security@mozilla.org — Vendor Advisory
security@mozilla.org — Vendor Advisory
security@mozilla.org — Vendor Advisory
security@mozilla.org — Vendor Advisory
security@mozilla.org — Vendor Advisory
security@mozilla.org — Vendor Advisory
security@mozilla.org — Vendor Advisory