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Description

Mattermost versions 11.6.x <= 11.6.1, 11.5.x <= 11.5.4, 10.11.x <= 10.11.15 fail to sanitize the Remote Cluster API response on PATCH operations, which allows authenticated users with the {{manage_secure_connections}} permission to obtain remote cluster authentication tokens via a PATCH request to the remote cluster endpoint.. Mattermost Advisory ID: MMSA-2026-00662

PUBLISHED Reserved 2026-04-27 | Published 2026-06-12 | Updated 2026-06-12 | Assigner Mattermost




MEDIUM: 6.5CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

Problem types

CWE-201: Insertion of Sensitive Information Into Sent Data

Product status

Default status
unaffected

11.6.0 (semver)
affected

11.5.0 (semver)
affected

10.11.0 (semver)
affected

11.7.0
unaffected

11.6.2
unaffected

11.5.5
unaffected

10.11.17
unaffected

Credits

winfunc finder

References

mattermost.com/security-updates (MMSA-2026-00662) vendor-advisory

cve.org (CVE-2026-7184)

nvd.nist.gov (CVE-2026-7184)

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