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CERT-FR published advisory CERTFR-2026-AVI-1348 on 21 October 2026 about multiple vulnerabilities in Mattermost Server. The vendor has not specified the nature or impact of the flaws, and the advisory says only that an attacker could cause an unspecified security problem. The advisory cites Mattermost security bulletins MMSA-2026-00772 an…
CERT-FR advisory CERTFR-2026-AVI-1344 reports multiple vulnerabilities in Mattermost Server. The vendor did not specify the security impact. The advisory covers fixes announced in Mattermost security bulletins dated 19 October 2026. It does not mention active exploitation, CVE identifiers, IOCs or attribution. Technical Details - Affected…
CERT-FR advisory CERTFR-2026-AVI-1338 reports a vulnerability in Mattermost Server that lets an attacker cause a security issue the vendor has not specified. It affects Mattermost Server 11.7.x versions earlier than 11.7.12. The advisory is based on Mattermost security bulletin MMSA-2026-00709 of 16 October 2026. It gives no CVE identifie…
CERT-FR advisory CERTFR-2026-AVI-1328, published 16 October 2026, reports multiple vulnerabilities in the Mattermost Desktop App. The vendor did not specify the security impact, and the advisory only states that an attacker could cause an unspecified security problem. It is based on Mattermost security bulletins MMSA-2026-00778 and MMSA-2…
