CVE-2026-106016CWE-693

CVE-2026-106016

Critical · published October 6, 2026

CVSS v3.1
9.8
EPSS
0%
Percentile
24.1
In the wild
Unconfirmed
What it is

Mitigation bypass in the File Handling component. This vulnerability was fixed in Firefox 157.0.1 and Thunderbird 158.

The record
Technical detail
CVSS v3.1
9.8 · CRITICAL
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS v4.0
Not supplied
EPSS
0.00323 · 24.1th percentile
Weakness
CWE-693 · Protection Mechanism Failure
Published
2026-10-06T17:16Z
Affected products (1)
ProductVersionsFixed in
mozilla/firefox< 157.0.1157.0.1
References (3)
https://bugzilla.mozilla.org/show_bug.cgi?id=2067465 · [email protected]https://www.mozilla.org/security/advisories/mfsa2026-104/ · [email protected]https://www.mozilla.org/security/advisories/mfsa2026-109/ · [email protected]
EPSS history
Timeline
  • 08 OCT 03:27Z
    EPSS moved — → 0%
    epss
  • 06 OCT 12:30Z
    Mitigation bypass in the File Handling component
    cvelistv5