CVE-2026-92035CWE-119

CVE-2026-92035

Critical · published September 15, 2026

CVSS v3.1
9.6
EPSS
0%
Percentile
24.5
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
9.6 · CRITICAL
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H
CVSS v4.0
Not supplied
EPSS
0.00328 · 24.5th percentile
Weakness
CWE-119 · Improper Restriction of Operations within the Bounds of a Memory Buffer
Published
2026-09-15T17:16Z
Affected products (7)
ProductVersionsFixed in
mozilla/firefox< 115.42.0115.42.0
mozilla/firefox≥ 116.0, < 140.17.0140.17.0
mozilla/firefox≥ 141.0, < 153.3.0153.3.0
mozilla/firefox≥ 154.0.0, < 156.0.0156.0.0
mozilla/thunderbird< 140.17.0140.17.0
mozilla/thunderbird≥ 141.0, < 153.3.0153.3.0
mozilla/thunderbird≥ 154.0, < 156.0156.0
References (8)
https://bugzilla.mozilla.org/show_bug.cgi?id=2061245 · [email protected]https://www.mozilla.org/security/advisories/mfsa2026-102/ · [email protected]https://www.mozilla.org/security/advisories/mfsa2026-90/ · [email protected]https://www.mozilla.org/security/advisories/mfsa2026-93/ · [email protected]https://www.mozilla.org/security/advisories/mfsa2026-94/ · [email protected]https://www.mozilla.org/security/advisories/mfsa2026-96/ · [email protected]https://www.mozilla.org/security/advisories/mfsa2026-98/ · [email protected]https://www.mozilla.org/security/advisories/mfsa2026-99/ · [email protected]
EPSS history
Timeline
  • 17 SEP 03:33Z
    EPSS moved — → 0%
    epss
  • 15 SEP 12:33Z
    Sandbox escape due to incorrect boundary conditions in the Graphics component
    cvelistv5