CVE-2026-9571
An attacker can exploit multiple vulnerabilities in Mattermost to carry out an unspecified attack.
CSIRTS triage
- What
- Multiple vulnerabilities allow an attacker to carry out an unspecified attack.
- Who is affected
- Users of Mattermost with the affected versions.
- Urgency
- Remediation is medium urgency due to the unspecified nature of the attack, which could vary in impact.
- Action
- Check for updates from Mattermost and apply any available patches.
AI-assisted analysis generated from the source advisory — verify against the original.
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Exploitation outlook
- Low exploitation risk0.17% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 7% of all EPSS-scored CVEs.
Advisory coverage (2)
- medium[UPDATE] [medium] Mattermost: Multiple vulnerabilities allow unspecified attackcert-bund · 2026-07-14
- mediumCVE-2026-9571: Mattermost versions 11.7.x <= 11.7.2, 11.6.x <= 11.6.4, 10.11.x <= 10.11.19 fail to invalidate …nvd · 2026-07-13
External references
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[](https://www.csirts.com/cve/CVE-2026-9571)