CVE-2026-100805CWE-362CWE-416

CVE-2026-100805

High · published September 29, 2026

CVSS v3.1
7.5
EPSS
0%
Percentile
10.4
In the wild
Unconfirmed
What it is

Race condition, use-after-free in the Audio/Video component. This vulnerability was fixed in Thunderbird 157 and Firefox 157.

The record
Technical detail
CVSS v3.1
7.5 · HIGH
Vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
CVSS v4.0
Not supplied
EPSS
0.00208 · 10.4th percentile
Weaknesses
CWE-362 · Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition'); CWE-416 · Use After Free
Published
2026-09-29T17:17Z
Affected products (2)
ProductVersionsFixed in
mozilla/firefox< 157.0.0157.0.0
mozilla/thunderbird< 157.0157.0
References (3)
https://bugzilla.mozilla.org/show_bug.cgi?id=2058785 · [email protected]https://www.mozilla.org/security/advisories/mfsa2026-101/ · [email protected]https://www.mozilla.org/security/advisories/mfsa2026-97/ · [email protected]
EPSS history
Timeline
  • 01 OCT 03:44Z
    EPSS moved — → 0%
    epss
  • 29 SEP 12:36Z
    Race condition, use-after-free in the Audio/Video component
    cvelistv5