CVE-2026-1628

CWE-8294 documents4 sources
Severity
4.6MEDIUM
EPSS
0.0%
top 90.16%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
2
Mattermost Mattermost DesktopMattermost Mattermost
Timeline
PublishedMar 2

Description

Mattermost Desktop App versions <=5.13.3 fail to attach listeners restricting navigation to external sites within the Mattermost app which allows a malicious server to expose preload script functionality to untrusted servers via having a user open an external link in their Mattermost server. Mattermost Advisory ID: MMSA-2026-00596

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:NExploitability: 2.1 | Impact: 2.5

Affected Packages2 packages

▶CVEListV5mattermost/mattermost5.13.3

🔴Vulnerability Details

2
GHSA
GHSA-4q28-37qp-xh4g: Mattermost Desktop App versions <=5↗2026-03-02
▶
CVEList
Mattermost allows external websites to open within the app, exposing preload functionality to non-trusted sites.↗2026-03-02
▶

🕵️Threat Intelligence

1
Wiz
CVE-2026-1628 Impact, Exploitability, and Mitigation Steps | Wiz↗
▶
CVE-2026-1628 (MEDIUM CVSS 4.6) | Mattermost Desktop App versions <=5 | cvebase.io