Name: CVE-2026-92035: Improper Restriction of Operations within the Bounds of a Memory Buffer
Creator: Rapid7
Published: 2026-09-15T00:00:00.000Z
License: https://www.rapid7.com/legal/website-terms-of-use/
Keywords: CVE, CVE-2026-92035, CWE-119, CVSS 9.6, EPSS 0.00328

Sandbox escape due to incorrect boundary conditions in the Graphics component. This vulnerability was fixed in Thunderbird 140.17, Firefox 156, Firefox ESR 153.3, Thunderbird 156, Thunderbird 153.3, Firefox ESR 115.42, and Firefox ESR 140.17.

CVSS Details

CVSS 3.1 Base Score: 9.6
CVSS 3.1 Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H)

Covered by Rapid7

Product	Vendor Advisory	Solution File	Added	Published
Alma_linux	—	Upgrade firefoxUpgrade thunderbirdUpgrade firefox-x11	Oct 26, 2026	Oct 6, 2026
Amazon Linux Ami 2	—	Upgrade firefox	Oct 19, 2026	Oct 19, 2026
Amazon_linux_2023	—	Upgrade firefoxUpgrade firefox-debugsourceUpgrade firefox-debuginfo	Oct 13, 2026	Sep 15, 2026
Debian	—	Upgrade thunderbird	Oct 5, 2026	Sep 15, 2026
Mfsa2026 90	—	Upgrade to Mozilla Firefox version 156.0Upgrade to the latest version of Mozilla Firefox	Sep 15, 2026	Sep 15, 2026
Mfsa2026 93	—	Upgrade to Mozilla Firefox ESR version 153.3Upgrade to the latest version of Mozilla Firefox	Sep 15, 2026	Sep 15, 2026
Mfsa2026 98	—	Upgrade to Mozilla Firefox ESR version 115.42Upgrade to the latest version of Mozilla Firefox	Sep 29, 2026	Sep 29, 2026
Mfsa2026 99	—	Upgrade to Mozilla Firefox ESR version 140.17Upgrade to the latest version of Mozilla Firefox	Sep 29, 2026	Sep 29, 2026
Mozilla Thunderbird	—	Upgrade to Mozilla Thunderbird version 140.17Upgrade to the latest version of Mozilla Thunderbird	Sep 15, 2026	Sep 15, 2026
Oracle_linux	—	Upgrade firefoxUpgrade thunderbirdUpgrade firefox-x11	Oct 22, 2026	Sep 15, 2026
Redhat_linux	—	Upgrade thunderbird-debuginfoUpgrade firefox-x11Upgrade thunderbird-debugsourceUpgrade firefox-debugsourceUpgrade firefox-debuginfoUpgrade firefoxUpgrade thunderbird	Oct 26, 2026	Sep 15, 2026
Rocky_linux	—	Upgrade firefox-debugsourceUpgrade firefox-debuginfoUpgrade firefox-x11Upgrade firefox	Oct 26, 2026	Oct 24, 2026

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CVSS Details

Covered by Rapid7

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