CVE-2026-12295
Sandbox escape in the DOM: Navigation component
HIGH 7.5EPSS 0.4%
Sandbox escape in the DOM: Navigation component. This vulnerability was fixed in Firefox 152, Firefox ESR 140.12, Firefox ESR 115.37, Thunderbird 152, and Thunderbird 140.12.
- Affected
- Mozilla · Firefox · Thunderbird
- CVSS v3.1 CNA
- 7.5 HIGH
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H - CVSS v3.1 CNA
- 9.6 CRITICAL
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H - EPSS
- 0.39% chance of exploitation in the next 30 days, 32nd percentile
- Published
- 2026-06-16
- Updated
- 2026-07-15
Proof-of-concept exploits (1)
- SneakyNachos/CVE-2026-12295-UXXS-in-my-wasm1★ · 2026-08-25
Security advisories
- https://www.mozilla.org/security/advisories/mfsa2026-57
- https://www.mozilla.org/security/advisories/mfsa2026-58
- https://www.mozilla.org/security/advisories/mfsa2026-59
- https://www.mozilla.org/security/advisories/mfsa2026-60
- https://www.mozilla.org/security/advisories/mfsa2026-61