CVE-2026-74940
critical · 9.8Use-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.
9.8
CVSS
0.6%
EPSS (exploit prob.)
49th
EPSS percentile
2026-08-18
Published
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weaknesses
CWE-416
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| mozilla | firefox | < 115.39.0 |
| mozilla | firefox | >= 116.0, < 140.14.0 |
| mozilla | firefox | >= 141.0, < 154.0.0 |
| mozilla | thunderbird | < 140.14.0 |
| mozilla | thunderbird | >= 141.0, < 153.1.0 |
Check a specific version with /api/v1/cve/match.
References
- https://bugzilla.mozilla.org/show_bug.cgi?id=2054842
- https://www.mozilla.org/security/advisories/mfsa2026-74/
- https://www.mozilla.org/security/advisories/mfsa2026-75/
- https://www.mozilla.org/security/advisories/mfsa2026-76/
- https://www.mozilla.org/security/advisories/mfsa2026-77/
- https://www.mozilla.org/security/advisories/mfsa2026-78/
- https://www.mozilla.org/security/advisories/mfsa2026-79/
- https://www.mozilla.org/security/advisories/mfsa2026-80/
Query this programmatically:
curl https://evil-db.io/api/v1/cve/CVE-2026-74940