CSIRTS // UNIFIED SECURITY ADVISORY FEEDSYS ● ONLINE · POWERED BY INTELFUSIONS.COM

← Back to feed

Multiple vulnerabilities in Mattermost Server (July 20, 2026)

unknown
Multiple vulnerabilities have been discovered in Mattermost Server. They allow an attacker to cause an unspecified security issue by the vendor.

CSIRTS triage

product: Mattermost ServerOther
What
Multiple vulnerabilities have been discovered in Mattermost Server that allow an attacker to cause an unspecified security issue.
Who is affected
Deployments of Mattermost Server are affected.
Urgency
Remediation urgency is unknown due to lack of specific details on the vulnerabilities.
Action
Monitor for updates from Mattermost regarding these vulnerabilities.

AI-assisted analysis generated from the source advisory — verify against the original.

⚡ Watch Mattermost Server

Get an email when a new Mattermost Server advisory drops — max one per day, one-click unsubscribe.

Details

Source
CERT-FR Avis de sécurité (FR · national-cert · site)
Severity
unknown
Published
2026-07-20
Exploitation
Not in CISA KEV at last sync
Language
Machine-translated to English — verify against the original

Original advisory: https://www.cert.ssi.gouv.fr/avis/CERTFR-2026-AVI-0902/

Recent advisories for Mattermost Server

A cluster of recent advisories against the same product widens the attack surface — attackers routinely chain freshly published CVEs on one product, so review these together.

More from CERT-FR Avis de sécurité