CVE-2026-109763

CVE-2026-109763

published October 13, 2026

CVSS
—
EPSS
0%
Percentile
5.6
In the wild
Unconfirmed
What it is

Mitigation bypass in the File Handling component. This vulnerability was fixed in Firefox 158, Firefox ESR 153.5, Thunderbird 158, and Thunderbird 153.5.

The record
Technical detail
CVSS
Not scored
CVSS v4.0
Not supplied
EPSS
0.00166 · 5.6th percentile
Published
2026-10-13T17:17Z
References (5)
https://bugzilla.mozilla.org/show_bug.cgi?id=2072501 · [email protected]https://www.mozilla.org/security/advisories/mfsa2026-106/ · [email protected]https://www.mozilla.org/security/advisories/mfsa2026-108/ · [email protected]https://www.mozilla.org/security/advisories/mfsa2026-109/ · [email protected]https://www.mozilla.org/security/advisories/mfsa2026-110/ · [email protected]
EPSS history
Timeline
  • 15 OCT 03:28Z
    EPSS moved — → 0%
    epss
  • 13 OCT 12:29Z
    Mitigation bypass in the File Handling component
    cvelistv5
  • 13 OCT 12:29Z
    Mitigation bypass in the File Handling component
    cvelistv5