CVE-2026-11993CWE-770denial-of-service

CVE-2026-11993

Medium · published September 14, 2026

CVSS v3.1
4.3
EPSS
0%
Percentile
11.5
In the wild
Unconfirmed
What it is

Mattermost versions 11.9.x <= 11.9.0, 11.8.x <= 11.8.4, 11.7.x <= 11.7.7, 10.11.x <= 10.11.22 fail to properly enforce the limit of concurrent files being processed and handled failed files, which allows a user with permission to upload files to spawn more goroutines than intended and block the indexing of other files via uploading heavy files constantly to the server.. Mattermost Advisory ID: MMSA-2026-00696

The record
Technical detail
CVSS v3.1
4.3 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L
CVSS v4.0
Not supplied
EPSS
0.00217 · 11.5th percentile
Weakness
CWE-770 · Allocation of Resources Without Limits or Throttling
Published
2026-09-14T15:17Z
Affected products (4)
ProductVersionsFixed in
mattermost/mattermost_server≥ 10.11.0, < 10.11.2310.11.23
mattermost/mattermost_server≥ 11.7.0, < 11.7.811.7.8
mattermost/mattermost_server≥ 11.8.0, < 11.8.511.8.5
mattermost/mattermost_server≥ 11.9.0, < 11.9.111.9.1
References (1)
https://mattermost.com/security-updates · [email protected]
EPSS history
Timeline
  • 16 SEP 04:24Z
    EPSS moved — → 0%
    epss
  • 14 SEP 10:29Z
    Fix authenticated members disabling file content indexing server-wide via extraction pool exhaustion
    cvelistv5