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CVE-2026-10106

Unauthorized users can trigger interactive post actions in private channels via action cookie channel mismatch in Mattermost PUBLISHED

Description (CNA)

Mattermost versions 11.7.x <= 11.7.2, 11.6.x <= 11.6.4, 10.11.x <= 10.11.19 fail to verify that the channel referenced in an action cookie matches the channel of the target post, which allows an authenticated user without access to a private channel to trigger interactive post actions on posts in that channel via a cookie obtained from any accessible channel.. Mattermost Advisory ID: MMSA-2026-00690

Affected (CNA)

Vendor / productVersions
Mattermost / Mattermostaffected 11.7.0 through 11.7.2; affected 11.6.0 through 11.6.4; affected 10.11.0 through 10.11.19; unaffected 11.8.0; unaffected 11.7.3; unaffected 11.6.5; unaffected 10.11.20

CWE

CWE-863

References

ADP enrichment

CISA-ADP

No English description supplied.

No references supplied.