CVE-2026-92045CWE-119

CVE-2026-92045

Critical · published September 15, 2026

CVSS v3.1
9.6
EPSS
0%
Percentile
21.6
In the wild
Unconfirmed
What it is

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

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
0.00300 · 21.6th percentile
Weakness
CWE-119 · Improper Restriction of Operations within the Bounds of a Memory Buffer
Published
2026-09-15T17:16Z
Affected products (4)
ProductVersionsFixed in
mozilla/firefox< 153.3.0153.3.0
mozilla/firefox≥ 154.0.0, < 156.0.0156.0.0
mozilla/thunderbird< 153.3.0153.3.0
mozilla/thunderbird≥ 154.0, < 156.0156.0
References (5)
https://bugzilla.mozilla.org/show_bug.cgi?id=2054622 · [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]
EPSS history
Timeline
  • 17 SEP 03:33Z
    EPSS moved — → 0%
    epss
  • 15 SEP 12:34Z
    Sandbox escape due to incorrect boundary conditions in the WebRTC component
    cvelistv5