CVE-2026-12284

lowpriority · track · 0EPSS 0.002 · 6 %ileDEUS
grimoire priorityP3 · Track
Exploitable?
—
no known exploitation
Likely / severe?
0.16% (6th) EPSS
CVSS 3.7 · low
Is it mine?
5 products
Check your exposure
Who says so?
2 sources
cert_bund · nvd

EPSS · scored 2026-10-28

Mattermost Desktop App versions <=6.2 6.2.2.0 fails to validate the IPC sender in the leaveCall handler which allows a malicious or compromised Mattermost server (or a user with script access to a connected server view) to disconnect an active call belonging to a different connected server via the desktopAPI.leaveCall IPC message. Mattermost Advisory ID: MMSA-2026-00699

01

cvss

Technical severity, 0–10. One row per scoring source.

3.7
010

base score 0–10 · higher = more severe · hover a vector to decode

v3.13.7lowCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:Lsecondary · responsibledisclosure@mattermost.comexploitability 2.2 · impact 1.4
v3.13.4lowCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L/E:Usecondary · CVSS-BT (t0sche)
02

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-346US
03

affected products (5)

Products and version ranges known to be affected.

04

advisories (1)

Vendor and ecosystem advisories describing this.

  • WID-SEC-W-2026-2876Mattermost Desktop: Mehrere SchwachstellenDeutsch2026-08-17csaf · cert_bundDE

    Ein Angreifer kann mehrere Schwachstellen in Mattermost Desktop ausnutzen, um Informationen offenzulegen oder um nicht näher spezifizierte Auswirkungen zu verursachen.

05

sources

Which sources assert this record, and when.

cert_bundnvdNVDCVE.orgMITRE
published 2026-09-17modified 2026-10-13
06

references (1) nvd

External citations — patches, advisories, analysis.

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