CVE-2026-74989
critical · 9.8Internally found bugs present in Thunderbird 153. Some of these bugs showed evidence of memory corruption or another security-relevant defect and we presume that with enough effort some of these could have been exploited. This vulnerability was fixed in Firefox 154 and Thunderbird 154.
9.8
CVSS
0.6%
EPSS (exploit prob.)
47th
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-119
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| mozilla | firefox | < 154.0.0 |
| mozilla | thunderbird | < 154.0 |
Check a specific version with /api/v1/cve/match.
References
- https://bugzilla.mozilla.org/buglist.cgi?bug_id=2022257%2C2027351%2C2027380%2C2029289
- https://bugzilla.mozilla.org/buglist.cgi?bug_id=2027388%2C2029750%2C2029794%2C2043298%2C2045126%2C2049810%2C2051741
- https://www.mozilla.org/security/advisories/mfsa2026-74/
- https://www.mozilla.org/security/advisories/mfsa2026-78/
Query this programmatically:
curl https://evil-db.io/api/v1/cve/CVE-2026-74989