CVE-2026-109779CWE-362

CVE-2026-109779

Medium · published October 13, 2026

CVSS v3.1
4.2
EPSS
0%
Percentile
3.1
In the wild
Unconfirmed
What it is

Race condition in the Networking: DNS component. This vulnerability was fixed in Firefox 158 and Thunderbird 158.

The record
Technical detail
CVSS v3.1
4.2 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:N
CVSS v4.0
Not supplied
EPSS
0.00141 · 3.1th percentile
Weakness
CWE-362 · Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')
Published
2026-10-13T17:17Z
References (3)
https://bugzilla.mozilla.org/show_bug.cgi?id=2072048 · [email protected]https://www.mozilla.org/security/advisories/mfsa2026-106/ · [email protected]https://www.mozilla.org/security/advisories/mfsa2026-109/ · [email protected]
EPSS history
Timeline
  • 15 OCT 03:28Z
    EPSS moved — → 0%
    epss
  • 13 OCT 12:29Z
    Race condition in the Networking: DNS component
    cvelistv5
  • 13 OCT 12:29Z
    Race condition in the Networking: DNS component
    cvelistv5