CVE-2026-19541 (GCVE-0-2026-19541)
Vulnerability from cvelistv5
Published
2026-10-16 06:54
Modified
2026-10-16 12:03
Severity ?
6.5 (Medium) - CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
CWE
  • CWE-201 - Insertion of Sensitive Information Into Sent Data
Summary
Mattermost versions 11.9.x <= 11.9.1, 11.8.x <= 11.8.5, 11.7.x <= 11.7.10, 11.10.x <= 11.10.1 fail to require re-entry of the stored client secret when validating an outgoing OAuth connection, which allows an authenticated user with permission to manage outgoing OAuth connections to obtain the secret via pointing the token URL at an attacker-controlled endpoint and triggering validation.. Mattermost Advisory ID: MMSA-2026-00761
References
Impacted products
Vendor Product Version
Mattermost Mattermost Version: 11.9.0   ≤ 11.9.1
Version: 11.8.0   ≤ 11.8.5
Version: 11.7.0   ≤ 11.7.10
Version: 11.10.0   ≤ 11.10.1
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