CVE-2026-1628Disclosure(mattermost / mattermost_desktop)

LOWCVSS 4.6 · MEDIUM

Signal is active with 2 mentions in latest observed window

Immediate actions

Track advisory updates for patch or workaround availability

Recommended action window: Monitor and triage in normal cycle

NVD 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

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0.0/ 10 priority

Sources & remediation

Vendor / third-party advisories

https://mattermost.com/security-updates

Weakness type (CWE)

CWE-829

Priority

LOW

Exploitation

NONE

PoC

NONE

Patch

NONE

Momentum

NONE

Are you affected?

If you run products in this scope, you should treat this CVE as relevant to your environment.

mattermost_desktop

Threat summary

2 mentions across 1 observed day

What's happening

Technical details provided in 2 signals
Disclosure: 2 classified signals
2 total mentions across 1 day

Affected systems

Vendors

mattermost

Products

mattermost_desktop

Deep dive

Activity timeline2 mentions / 1d

Signal classification1 categories

Disclosure

2100.0%

Referenced assets2 URLs

By indicator

Full discourse2 posts

Infoflowcloud@infoflowcloud222d
Disclosure
🚨*CVE* CVE-2026-1628 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 … https://www.cve.org/CVERecord?id=CVE-2026-1628 ----- Traducción: CVE-2026-1628 Las… http://infoflow.cloud`
Post summary
The post announces CVE-2026-1628, highlighting a navigation restriction flaw in Mattermost Desktop App, but offers no PoC, exploit, or patch details.
0000042
55 followersView on X
CVE@CVEnew222d
Disclosure
CVE-2026-1628 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 … https://www.cve.org/CVERecord?id=CVE-2026-1628
Post summary
CVE-2026-1628 exposes a flaw in Mattermost Desktop App where missing listeners allow a malicious server to bypass navigation restrictions and access external sites.
00000245
56.6K followersView on X

CPE platform detail1 entries

Part:

Vendor:

Product:

Version:

Target SW:

Target HW:

1 of 1 entries

Part	Vendor	Product	Version	Target SW	Target HW
App	mattermost	mattermost_desktop	-	-	-

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