Medium severity6.5NVD Advisory· Published Oct 16, 2026
CVE-2026-19541
CVE-2026-19541
Description
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
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected products
1- Range: <=11.9.1, <=11.8.5, <=11.7.10, <=11.10.1
Patches
Vulnerability mechanics
References
1News mentions
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