Authentication Bypass Vulnerability in Mattermost by Mattermost
CVE-2026-22545

3.1LOW

Key Information:

Vendor

Mattermost
Status
Mattermost
Vendor
CVE Published:
16 March 2026

What is CVE-2026-22545?

A critical authentication bypass vulnerability exists in Mattermost versions 10.11.x up to 10.11.10. This weakness stems from the inadequate validation of a user's authentication method when changing account auth types. An authenticated attacker can exploit this flaw to change the account password without proper confirmation, potentially leading to unauthorized access. For more details, refer to the Mattermost advisory.

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Affected Version(s)

Mattermost 10.11.0 <= 10.11.10

Mattermost 11.4.0

Mattermost 10.11.11

References

https://mattermost.com/security-updates
vendor-advisory

CVSS V3.1

Score:
3.1
Severity:
LOW
Confidentiality:
None
Integrity:
Low
Availability:
None
Attack Vector:
Network
Attack Complexity:
High
Privileges Required:
None
User Interaction:
Required
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

daw10
JSON
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