CVE-2026-4643

lowpriority · track · 0EPSS 0.002 · 6 %ileDEEUUS

grimoire priorityP3 · Track

Exploitable?

—

no known exploitation

Likely / severe?

0.17% (6th) EPSS

CVSS 3.5 · low

Is it mine?

11 products

Check your exposure

Who says so?

4 sources

cnnvd · enisa_euvd · cert_bund · nvd

EPSS · scored 2026-10-28

Mattermost Desktop App versions <=6.1 6.0.1 5.4.13.0 fail to prevent server-rendered content from closing an underlying application view in the Mattermost Desktop App which allows a malicious server or plugin to crash the desktop client via invoking {{window.close()}} in the renderer context, leading to a denial of service condition at the client level. Mattermost Advisory ID: MMSA-2026-00633

cvss

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

3.5

010

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

v3.13.5lowCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:N/A:Lsecondary · ENISA EU

v3.13.5lowCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:N/A:Lsecondary · responsibledisclosure@mattermost.comexploitability 2.1 · impact 1.4

v3.13.2lowCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:N/A:L/E:Usecondary · CVSS-BT (t0sche)

ssvc

A stakeholder decision — act, attend, or track — from exploitation and impact.

Trackcoordinatorcisa_ssvcUS

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-754US

affected products (11)

Products and version ranges known to be affected.

Mattermost Mattermost Desktop <5.13.6all versionscert_bundDE
Mattermost Mattermost Desktop <6.1.1all versionscert_bundDE
Mattermost Mattermost Desktop <6.2.0all versionscert_bundDE
Mattermost Mattermost≤ Desktop <6.2.0cert_bundDE
Mattermost Mattermost≤ Desktop <5.13.6cert_bundDE
Mattermost Mattermost≤ Desktop <6.1.1cert_bundDE
Mattermost Mattermost≤ 0 ≤6.0.1enisa_euvdEU
Mattermost Mattermost≤ 0 ≤5.4.13enisa_euvdEU
mattermost mattermost desktop≤ 5.4.13.0nvdUScpe:2.3:a:mattermost:mattermost_desktop:*:*:*:*:*:*:*:*
mattermost mattermost desktop6.0.0 → 6.0.1nvdUScpe:2.3:a:mattermost:mattermost_desktop:*:*:*:*:*:*:*:*
mattermost mattermost desktop6.1.0 → 6.2.0nvdUScpe:2.3:a:mattermost:mattermost_desktop:*:*:*:*:*:*:*:*

advisories (1)

Vendor and ecosystem advisories describing this.

WID-SEC-W-2026-1565Mattermost Desktop: Mehrere Schwachstellen ermöglichen nicht spezifizierten AngriffDeutsch2026-05-17csaf · cert_bundDE
Ein Angreifer kann mehrere Schwachstellen in Mattermost Desktop ausnutzen, um einen nicht näher spezifizierten Angriff durchzuführen.

also known as (3)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd cert_bund nvd NVD CVE.org MITRE

published 2026-05-18modified 2026-06-17

references (4)

External citations — patches, advisories, analysis.

scry

Attackers weaponise vulnerabilities like this against internet-exposed services. See what is exposed on your perimeter with a free passive scan.

Free scan