critical9.8
CVE-2026-16377
Mitigation bypass in the PDF Viewer component.
Impact
Mitigation bypass in the PDF Viewer component. This vulnerability was fixed in Firefox 153, Firefox ESR 140.13, Thunderbird 153, and Thunderbird 140.13.
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Mozilla | Firefox | before 140.13.0 before 153.0.0 |
| Mozilla | Thunderbird | before 140.13.0 from 141.0 before 153.0 |
Weakness classification
References
- NVD record
- CVE.org record
- https://bugzilla.mozilla.org/show_bug.cgi?id=2037770
- https://www.mozilla.org/security/advisories/mfsa2026-68/
- https://www.mozilla.org/security/advisories/mfsa2026-70/
- https://www.mozilla.org/security/advisories/mfsa2026-71/
- https://www.mozilla.org/security/advisories/mfsa2026-72/