CVE-2026-9162
Multiple vulnerabilities have been discovered in Mattermost products. They allow an attacker to cause security policy bypass and an unspecified security issue by the editor.
CSIRTS triage
- What
- Multiple vulnerabilities in Mattermost products allow attackers to bypass security policies and cause unspecified security issues through the editor.
- Who is affected
- All Mattermost product deployments are affected; specific versions are not stated.
- Urgency
- Moderate urgency; security policy bypass is serious but no active exploitation reported.
- Action
- Check Mattermost security advisory page for affected versions and apply available patches.
AI-assisted analysis generated from the source advisory — verify against the original.
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Exploitation outlook
- Low exploitation risk0.33% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 26% of all EPSS-scored CVEs.
Advisory coverage (1)
- unknownMultiple vulnerabilities in Mattermost products (May 22, 2026)cert-fr-avis · 2026-05-22
External references
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[](https://www.csirts.com/cve/CVE-2026-9162)