CVE-2026-6961
Multiple vulnerabilities have been discovered in Mattermost products. Some of them allow an attacker to cause privilege escalation, data confidentiality breach and data integrity breach.
CSIRTS triage
- What
- Multiple vulnerabilities in Mattermost products allow attackers to escalate privileges, breach data confidentiality, and compromise data integrity.
- Who is affected
- All Mattermost product deployments are affected; specific versions are not stated.
- Urgency
- High urgency; privilege escalation and data breach capabilities present serious risk even without active exploitation.
- Action
- Check Mattermost security advisory page for affected versions and apply patches or updates immediately.
AI-assisted analysis generated from the source advisory — verify against the original.
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Exploitation outlook
- Low exploitation risk0.30% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 23% of all EPSS-scored CVEs.
Advisory coverage (1)
- unknownMultiple vulnerabilities in Mattermost products (May 19, 2026)cert-fr-avis · 2026-05-19
External references
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