CVE-2026-109740
CVE-2026-109740 · Sandbox escape due to incorrect boundary conditions in the Widget: Win32 component
This page contains facts from public vulnerability sources. Check the original advisory before updating.
This page shows selected source facts. See the linked advisories for the complete description and affected versions.
Sandbox escape due to incorrect boundary conditions in the Widget: Win32 component. This vulnerability was fixed in Firefox 158, Firefox ESR 153.5, Thunderbird 158, and Thunderbird 153.5.
CVSS 9.6 · Critical · EPSS 0.3%
- Published
- Updated
Stack: system
Affected products and versions
firefox
- Versions
- ≥ 153.5, ≤ 153.*: Not affected (rpm)
- ≥ 158: Not affected (rpm)
No fix published
thunderbird
- Versions
- ≥ 153.5, ≤ 153.*: Not affected (rpm)
- ≥ 158: Not affected (rpm)
No fix published
firefox-esr Debian:12
- Versions
- 102.11.0esr-1
- 102.12.0esr-1
- 102.12.0esr-1~deb10u1
- 102.12.0esr-1~deb11u1
- 102.12.0esr-1~deb12u1
- 102.13.0esr-1
- 102.13.0esr-1~deb10u1
- 102.13.0esr-1~deb11u1
- 102.13.0esr-1~deb12u1
- 102.14.0esr-1~deb10u1
- 102.14.0esr-1~deb11u1
- 102.14.0esr-1~deb12u1
- 102.15.0esr-1~deb10u1
- 102.15.0esr-1~deb11u1
- 102.15.0esr-1~deb12u1
- 102.15.1esr-1~deb10u1
- 102.15.1esr-1~deb11u1
- 102.15.1esr-1~deb12u1
- 115.0.2esr-1
- 115.1.0esr-1
- 115.10.0esr-1
- 115.10.0esr-1~deb10u1
- 115.10.0esr-1~deb11u1
- 115.10.0esr-1~deb12u1
- 115.11.0esr-1
- 115.11.0esr-1~deb10u1
- 115.11.0esr-1~deb11u1
- 115.11.0esr-1~deb12u1
- 115.12.0esr-1
- 115.12.0esr-1~deb10u1
- 115.12.0esr-1~deb11u1
- 115.12.0esr-1~deb12u1
- 115.13.0esr-1
- 115.13.0esr-1~deb11u1
- 115.13.0esr-1~deb12u1
- 115.13.0esr-2
- 115.14.0esr-1
- 115.14.0esr-1~deb11u1
- 115.14.0esr-1~deb12u1
- 115.15.0esr-1
- 115.15.0esr-1~deb11u1
- 115.15.0esr-1~deb12u1
- 115.2.0esr-1
- 115.2.1esr-1
- 115.3.0esr-1
- 115.3.0esr-1~deb10u1
- 115.3.0esr-1~deb11u1
- 115.3.0esr-1~deb12u1
- 115.3.1esr-1~deb10u1
- 115.3.1esr-1~deb11u1
- 115.4.0esr-1
- 115.4.0esr-1~deb10u1
- 115.4.0esr-1~deb11u1
- 115.4.0esr-1~deb12u1
- 115.5.0esr-1
- 115.5.0esr-1~deb10u1
- 115.5.0esr-1~deb11u1
- 115.5.0esr-1~deb12u1
- 115.6.0esr-1
- 115.6.0esr-1~deb10u1
- 115.6.0esr-1~deb11u1
- 115.6.0esr-1~deb12u1
- 115.7.0esr-1
- 115.7.0esr-1~deb10u1
- 115.7.0esr-1~deb11u1
- 115.7.0esr-1~deb12u1
- 115.8.0esr-1
- 115.8.0esr-1~deb10u1
- 115.8.0esr-1~deb11u1
- 115.8.0esr-1~deb12u1
- 115.9.0esr-1
- 115.9.0esr-1~deb11u1
- 115.9.0esr-1~deb12u1
- 115.9.0esr-2
- 115.9.1esr-1
- 115.9.1esr-1~deb10u1
- 115.9.1esr-1~deb11u1
- 115.9.1esr-1~deb12u1
- 128.10.0esr-1
- 128.10.0esr-1~deb12u1
- 128.10.1esr-1
- 128.10.1esr-1~deb11u1
- 128.10.1esr-1~deb12u1
- 128.11.0esr-1
- 128.11.0esr-1~deb11u1
- 128.11.0esr-1~deb12u1
- 128.12.0esr-1
- 128.12.0esr-1~deb11u1
- 128.12.0esr-1~deb12u1
- 128.13.0esr-1
- 128.13.0esr-1~deb11u1
- 128.13.0esr-1~deb12u1
- 128.14.0esr-1
- 128.14.0esr-1~deb11u1
- 128.14.0esr-1~deb12u1
- 128.14.0esr-1~deb13u1
- 128.3.0esr-1
- 128.3.0esr-1~deb11u1
- 128.3.0esr-1~deb11u2
- 128.3.0esr-1~deb12u1
- 128.3.0esr-2
- 128.3.1esr-1
- 128.3.1esr-1~deb11u1
- 128.3.1esr-1~deb12u1
- 128.3.1esr-2
- 128.4.0esr-1
- 128.4.0esr-1~deb11u1
- 128.4.0esr-1~deb12u1
- 128.5.0esr-1
- 128.5.0esr-1~deb11u1
- 128.5.0esr-1~deb12u1
- 128.5.1esr-1
- 128.6.0esr-1
- 128.6.0esr-1~deb11u1
- 128.6.0esr-1~deb11u2
- 128.6.0esr-1~deb11u3
- 128.6.0esr-1~deb12u1
- 128.6.0esr-2
- 128.6.0esr-3
- 128.6.0esr-4
- 128.7.0esr-1
- 128.7.0esr-1~deb11u1
- 128.7.0esr-1~deb12u1
- 128.8.0esr-1
- 128.8.0esr-1~deb11u1
- 128.8.0esr-1~deb12u1
- 128.9.0esr-1
- 128.9.0esr-1~deb11u1
- 128.9.0esr-1~deb12u1
- 128.9.0esr-2
- 140.10.0esr-1
- 140.10.0esr-1~deb11u1
- 140.10.0esr-1~deb12u1
- 140.10.0esr-1~deb13u1
- 140.10.1esr-1
- 140.10.1esr-1~deb11u1
- 140.10.1esr-1~deb12u1
- 140.10.1esr-1~deb13u1
- 140.10.2esr-1
- 140.10.2esr-1~deb11u1
- 140.10.2esr-1~deb12u1
- 140.10.2esr-1~deb13u1
- 140.11.0esr-1
- 140.11.0esr-1~deb11u1
- 140.11.0esr-1~deb12u1
- 140.11.0esr-1~deb13u1
- 140.12.0esr-1
- 140.12.0esr-1~deb11u1
- 140.12.0esr-1~deb12u1
- 140.12.0esr-1~deb13u1
- 140.13.0esr-1
- 140.13.0esr-1~deb11u1
- 140.13.0esr-1~deb12u1
- 140.13.0esr-1~deb13u1
- 140.13.0esr-2
- 140.14.0esr-1~deb11u1
- 140.14.0esr-1~deb12u1
- 140.14.0esr-1~deb13u1
- 140.14.0esr-2
- 140.15.0esr-1
- 140.15.0esr-1~deb12u1
- 140.15.0esr-1~deb13u1
- 140.16.0esr-1
- 140.16.0esr-1~deb12u1
- 140.16.0esr-1~deb13u1
- 140.3.0esr-1
- 140.3.0esr-1~deb11u1
- 140.3.0esr-1~deb11u2
- 140.3.0esr-1~deb12u1
- 140.3.0esr-1~deb13u1
- 140.3.0esr-2
- 140.3.1esr-1
- 140.3.1esr-1~deb11u1
- 140.3.1esr-1~deb12u1
- 140.3.1esr-1~deb13u1
- 140.3.1esr-2
- 140.4.0esr-1
- 140.4.0esr-1~deb11u1
- 140.4.0esr-1~deb12u1
- 140.4.0esr-1~deb13u1
- 140.5.0esr-1
- 140.5.0esr-1~deb11u1
- 140.5.0esr-1~deb12u1
- 140.5.0esr-1~deb13u1
- 140.6.0esr-1
- 140.6.0esr-1~deb11u1
- 140.6.0esr-1~deb12u1
- 140.6.0esr-1~deb13u1
- 140.7.0esr-1
- 140.7.0esr-1~deb11u1
- 140.7.0esr-1~deb12u1
- 140.7.0esr-1~deb13u1
- 140.8.0esr-1
- 140.8.0esr-1~deb11u1
- 140.8.0esr-1~deb12u1
- 140.8.0esr-1~deb13u1
- 140.9.0esr-1
- 140.9.0esr-1~deb11u1
- 140.9.0esr-1~deb12u1
- 140.9.0esr-1~deb13u1
- 140.9.1esr-1
- 140.9.1esr-1~deb11u1
- 140.9.1esr-1~deb12u1
- 140.9.1esr-1~deb13u1
- 153.1.0esr-1
- 153.2.0esr-1
No fix published
firefox-esr Debian:13
- Versions
- 128.13.0esr-1
- 128.14.0esr-1
- 128.14.0esr-1~deb11u1
- 128.14.0esr-1~deb12u1
- 128.14.0esr-1~deb13u1
- 140.10.0esr-1
- 140.10.0esr-1~deb11u1
- 140.10.0esr-1~deb12u1
- 140.10.0esr-1~deb13u1
- 140.10.1esr-1
- 140.10.1esr-1~deb11u1
- 140.10.1esr-1~deb12u1
- 140.10.1esr-1~deb13u1
- 140.10.2esr-1
- 140.10.2esr-1~deb11u1
- 140.10.2esr-1~deb12u1
- 140.10.2esr-1~deb13u1
- 140.11.0esr-1
- 140.11.0esr-1~deb11u1
- 140.11.0esr-1~deb12u1
- 140.11.0esr-1~deb13u1
- 140.12.0esr-1
- 140.12.0esr-1~deb11u1
- 140.12.0esr-1~deb12u1
- 140.12.0esr-1~deb13u1
- 140.13.0esr-1
- 140.13.0esr-1~deb11u1
- 140.13.0esr-1~deb12u1
- 140.13.0esr-1~deb13u1
- 140.13.0esr-2
- 140.14.0esr-1~deb11u1
- 140.14.0esr-1~deb12u1
- 140.14.0esr-1~deb13u1
- 140.14.0esr-2
- 140.15.0esr-1
- 140.15.0esr-1~deb12u1
- 140.15.0esr-1~deb13u1
- 140.16.0esr-1
- 140.16.0esr-1~deb12u1
- 140.16.0esr-1~deb13u1
- 140.3.0esr-1
- 140.3.0esr-1~deb11u1
- 140.3.0esr-1~deb11u2
- 140.3.0esr-1~deb12u1
- 140.3.0esr-1~deb13u1
- 140.3.0esr-2
- 140.3.1esr-1
- 140.3.1esr-1~deb11u1
- 140.3.1esr-1~deb12u1
- 140.3.1esr-1~deb13u1
- 140.3.1esr-2
- 140.4.0esr-1
- 140.4.0esr-1~deb11u1
- 140.4.0esr-1~deb12u1
- 140.4.0esr-1~deb13u1
- 140.5.0esr-1
- 140.5.0esr-1~deb11u1
- 140.5.0esr-1~deb12u1
- 140.5.0esr-1~deb13u1
- 140.6.0esr-1
- 140.6.0esr-1~deb11u1
- 140.6.0esr-1~deb12u1
- 140.6.0esr-1~deb13u1
- 140.7.0esr-1
- 140.7.0esr-1~deb11u1
- 140.7.0esr-1~deb12u1
- 140.7.0esr-1~deb13u1
- 140.8.0esr-1
- 140.8.0esr-1~deb11u1
- 140.8.0esr-1~deb12u1
- 140.8.0esr-1~deb13u1
- 140.9.0esr-1
- 140.9.0esr-1~deb11u1
- 140.9.0esr-1~deb12u1
- 140.9.0esr-1~deb13u1
- 140.9.1esr-1
- 140.9.1esr-1~deb11u1
- 140.9.1esr-1~deb12u1
- 140.9.1esr-1~deb13u1
- 153.1.0esr-1
- 153.2.0esr-1
- 153.3.0esr-1
- 153.4.0esr-1
- 153.4.0esr-1~deb12u1
- 153.4.0esr-1~deb13u1
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
firefox-esr Debian:14
- Versions
- 128.13.0esr-1
- 128.14.0esr-1
- 128.14.0esr-1~deb11u1
- 128.14.0esr-1~deb12u1
- 128.14.0esr-1~deb13u1
- 140.10.0esr-1
- 140.10.0esr-1~deb11u1
- 140.10.0esr-1~deb12u1
- 140.10.0esr-1~deb13u1
- 140.10.1esr-1
- 140.10.1esr-1~deb11u1
- 140.10.1esr-1~deb12u1
- 140.10.1esr-1~deb13u1
- 140.10.2esr-1
- 140.10.2esr-1~deb11u1
- 140.10.2esr-1~deb12u1
- 140.10.2esr-1~deb13u1
- 140.11.0esr-1
- 140.11.0esr-1~deb11u1
- 140.11.0esr-1~deb12u1
- 140.11.0esr-1~deb13u1
- 140.12.0esr-1
- 140.12.0esr-1~deb11u1
- 140.12.0esr-1~deb12u1
- 140.12.0esr-1~deb13u1
- 140.13.0esr-1
- 140.13.0esr-1~deb11u1
- 140.13.0esr-1~deb12u1
- 140.13.0esr-1~deb13u1
- 140.13.0esr-2
- 140.14.0esr-1~deb11u1
- 140.14.0esr-1~deb12u1
- 140.14.0esr-1~deb13u1
- 140.14.0esr-2
- 140.15.0esr-1
- 140.15.0esr-1~deb12u1
- 140.15.0esr-1~deb13u1
- 140.16.0esr-1
- 140.16.0esr-1~deb12u1
- 140.16.0esr-1~deb13u1
- 140.3.0esr-1
- 140.3.0esr-1~deb11u1
- 140.3.0esr-1~deb11u2
- 140.3.0esr-1~deb12u1
- 140.3.0esr-1~deb13u1
- 140.3.0esr-2
- 140.3.1esr-1
- 140.3.1esr-1~deb11u1
- 140.3.1esr-1~deb12u1
- 140.3.1esr-1~deb13u1
- 140.3.1esr-2
- 140.4.0esr-1
- 140.4.0esr-1~deb11u1
- 140.4.0esr-1~deb12u1
- 140.4.0esr-1~deb13u1
- 140.5.0esr-1
- 140.5.0esr-1~deb11u1
- 140.5.0esr-1~deb12u1
- 140.5.0esr-1~deb13u1
- 140.6.0esr-1
- 140.6.0esr-1~deb11u1
- 140.6.0esr-1~deb12u1
- 140.6.0esr-1~deb13u1
- 140.7.0esr-1
- 140.7.0esr-1~deb11u1
- 140.7.0esr-1~deb12u1
- 140.7.0esr-1~deb13u1
- 140.8.0esr-1
- 140.8.0esr-1~deb11u1
- 140.8.0esr-1~deb12u1
- 140.8.0esr-1~deb13u1
- 140.9.0esr-1
- 140.9.0esr-1~deb11u1
- 140.9.0esr-1~deb12u1
- 140.9.0esr-1~deb13u1
- 140.9.1esr-1
- 140.9.1esr-1~deb11u1
- 140.9.1esr-1~deb12u1
- 140.9.1esr-1~deb13u1
- 153.1.0esr-1
- 153.2.0esr-1
- 153.3.0esr-1
- 153.4.0esr-1
- 153.4.0esr-1~deb12u1
- 153.4.0esr-1~deb13u1
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
mozjs52 Ubuntu:18.04:LTS
- Versions
- 52.3.1-0ubuntu3
- 52.3.1-7fakesync1
- 52.8.1-0ubuntu0.18.04.1
- 52.9.1-0ubuntu0.18.04.1
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
mozjs38 Ubuntu:18.04:LTS
- Versions
- 38.8.0~repack1-0ubuntu1
- 38.8.0~repack1-0ubuntu3
- 38.8.0~repack1-0ubuntu4
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
mozjs68 Ubuntu:20.04:LTS
- Versions
- 68.5.0-1~fakesync
- 68.5.0-2~fakesync
- 68.6.0-1
- 68.6.0-1ubuntu1
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
mozjs52 Ubuntu:20.04:LTS
- Versions
- 52.9.1-1build1
- 52.9.1-1ubuntu3
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
mozjs102 Ubuntu:22.04:LTS
- Versions
- 102.11.0-0ubuntu0.22.04.1
- 102.12.0-0ubuntu0.22.04.1
- 102.13.0-0ubuntu0.22.04.1
- 102.15.1-0ubuntu0.22.04.1
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
mozjs78 Ubuntu:22.04:LTS
- Versions
- 78.13.0-1
- 78.15.0-2
- 78.15.0-4ubuntu1
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
mozjs91 Ubuntu:22.04:LTS
- Versions
- 91.5.1-0ubuntu1
- 91.6.0-1
- 91.6.0-2
- 91.7.0-2
- 91.10.0-0ubuntu1
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
thunderbird Ubuntu:22.04:LTS
- Versions
- 1:91.1.2+build1-0ubuntu1
- 1:91.3.0+build2-0ubuntu1
- 1:91.3.1+build1-0ubuntu1
- 1:91.3.2+build1-0ubuntu1
- 1:91.4.0+build1.1-0ubuntu1
- 1:91.4.0+build2-0ubuntu1
- 1:91.5.0+build1-0ubuntu1
- 1:91.5.1+build1-0ubuntu1
- 1:91.6.1+build1-0ubuntu1
- 1:91.7.0+build1-0ubuntu1
- 1:91.7.0+build2-0ubuntu1
- 1:91.8.0+build2-0ubuntu1
- 1:91.9.1+build1-0ubuntu0.22.04.1
- 1:91.11.0+build2-0ubuntu0.22.04.1
- 1:102.2.2+build1-0ubuntu0.22.04.1
- 1:102.4.2+build2-0ubuntu0.22.04.1
- 1:102.7.1+build2-0ubuntu0.22.04.1
- 1:102.8.0+build2-0ubuntu0.22.04.1
- 1:102.9.0+build1-0ubuntu0.22.04.1
- 1:102.10.0+build2-0ubuntu0.22.04.1
- 1:102.11.0+build1-0ubuntu0.22.04.1
- 1:102.13.0+build1-0ubuntu0.22.04.1
- 1:102.15.0+build1-0ubuntu0.22.04.1
- 1:102.15.1+build1-0ubuntu0.22.04.1
- 1:115.3.1+build1-0ubuntu0.22.04.2
- 1:115.4.1+build1-0ubuntu0.22.04.1
- 1:115.5.0+build1-0ubuntu0.22.04.1
- 1:115.6.0+build2-0ubuntu0.22.04.1
- 1:115.8.1+build1-0ubuntu0.22.04.1
- 1:115.9.0+build1-0ubuntu0.22.04.1
- 1:115.10.1+build1-0ubuntu0.22.04.1
- 1:115.11.0+build2-0ubuntu0.22.04.1
- 1:115.12.0+build3-0ubuntu0.22.04.1
- 1:115.13.0+build5-0ubuntu0.22.04.1
- 1:115.15.0+build1-0ubuntu0.22.04.1
- 1:115.16.0+build2-0ubuntu0.22.04.1
- 1:115.18.0+build1-0ubuntu0.22.04.1
- 1:128.12.0+build1-0ubuntu0.22.04.1
- 1:140.7.1+build1-0ubuntu0.22.04.1
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
mozjs102 Ubuntu:24.04:LTS
- Versions
- 102.15.1-1
- 102.15.1-3ubuntu2
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
mozjs115 Ubuntu:24.04:LTS
- Versions
- 115.3.0-0ubuntu1
- 115.4.0-2
- 115.5.0-1
- 115.6.0-1
- 115.7.0-4
- 115.8.0-1
- 115.9.0-1
- 115.9.0-1build1
- 115.10.0-1
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
Original sources
- https://bugzilla.mozilla.org/show_bug.cgi?id=2057113
- https://www.mozilla.org/security/advisories/mfsa2026-106/
- https://www.mozilla.org/security/advisories/mfsa2026-108/
- https://www.mozilla.org/security/advisories/mfsa2026-109/
- https://www.mozilla.org/security/advisories/mfsa2026-110/
- https://nvd.nist.gov/vuln/detail/CVE-2026-109740