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Medium severity5.4NVD Advisory· Published Jul 13, 2026· Updated Jul 13, 2026

CVE-2026-9597

CVE-2026-9597

Description

Mattermost versions 11.7.x <= 11.7.2, 11.6.x <= 11.6.4 fail to verify whether a guest account is deactivated before creating a session in the magic-link token login path, which allows a deactivated guest user to obtain a fully functional session via a magic-link token issued prior to deactivation.. Mattermost Advisory ID: MMSA-2026-00681

Affected products

2
  • Mattermost/Mattermostllm-fuzzy2 versions
    <=11.7.2, <=11.6.4+ 1 more
    • (no CPE)range: <=11.7.2, <=11.6.4
    • cpe:2.3:a:mattermost:mattermost_server:*:*:*:*:*:*:*:*range: >=11.6.0,<11.6.5

Patches

Vulnerability mechanics

References

1

News mentions

0

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