CVE-2026-22545Network attack vector

Password change bypass via spoofed authentication provider

Published Mar 16, 2026 · Updated Mar 16, 2026

Incorrect authorization in Mattermost 10.11.0 through 10.11.10 allows remote authenticated users to change an account password without confirmation. The account authentication-type switch accepts a falsely asserted alternate provider without validating the user's existing authentication method before permitting a password change. Exploitation requires access to the network endpoint and a crafted provider-switch flow, and the documented consequence is unauthorized password modification rather than data disclosure or service interruption.

CVSS severity3.1
Low
EPSS probability0.15%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Incorrect authorization in Mattermost 10.11.0 through 10.11.10 allows remote authenticated users to change an account password without confirmation. The account authentication-type switch accepts a falsely asserted alternate provider without validating the user's existing authentication method before permitting a password change. Exploitation requires access to the network endpoint and a crafted provider-switch flow, and the documented consequence is unauthorized password modification rather than data disclosure or service interruption.

The record

CVE
CVE-2026-22545
Published
Mar 16, 2026
Updated
Mar 16, 2026
Vendor
Mattermost
Product
Mattermost
Classifications
CWE-863, T1098
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Mar 16, 2026CVE publishedPublication date reported by the CVE source.
  2. Mar 16, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=10.11.0 <=10.11.10

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Mattermost · Mattermostversion=10.11.0 <=10.11.10

Published CVSS scores

3.1Mattermost, Inc.CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:L/A:N
3.5NIST NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:L/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-863Incorrect Authorization
T1098Account Manipulation

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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