CVE-2026-9597

See a problem?
Please try reporting it to the source first.

Source

https://cve.org/CVERecord?id=CVE-2026-9597

Import Source

https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-9597.json

JSON Data

https://api.osv.dev/v1/vulns/CVE-2026-9597

Published

2026-07-13T08:17:36.717Z

Modified

2026-07-16T03:48:47.555569712Z

Severity

5.4 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N CVSS Calculator

Summary

Deactivated guest accounts can authenticate via magic-link token in Mattermost REST API login endpoint

Details

Mattermost versions 11.7.x <= 11.7.2, 11.6.x <= 11.6.4 fail to verify whether a guest account is deactivated before creating a session in the magic-link token login path, which allows a deactivated guest user to obtain a fully functional session via a magic-link token issued prior to deactivation.. Mattermost Advisory ID: MMSA-2026-00681

Database specific

{
    "cna_assigner": "Mattermost",
    "unresolved_ranges": [
        {
            "extracted_events": [
                {
                    "introduced": "11.7.0"
                },
                {
                    "last_affected": "11.7.2"
                },
                {
                    "introduced": "11.6.0"
                },
                {
                    "last_affected": "11.6.4"
                }
            ],
            "source": "AFFECTED_FIELD"
        }
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/9xxx/CVE-2026-9597.json",
    "cwe_ids": [
        "CWE-305"
    ]
}

References

Affected packages

Git / github.com/mattermost/mattermost

Affected ranges

Type

GIT

Repo

https://github.com/mattermost/mattermost

Events

Introduced

d4f4e78835e86e2e76f76bfe797623076f5c9835

Fixed

b94397a68c6129bb904dcb0ab7643b188f2717b0

Introduced

a9e574a82633915f22071f0d7ca2b006f249ec2a

Fixed

28b63b15f73e0ed02d0da0018e06d88c47a77c48

Database specific

{
    "cpe": "cpe:2.3:a:mattermost:mattermost_server:*:*:*:*:*:*:*:*",
    "extracted_events": [
        {
            "introduced": "11.6.0"
        },
        {
            "fixed": "11.6.5"
        },
        {
            "introduced": "11.7.0"
        },
        {
            "fixed": "11.7.3"
        }
    ],
    "source": "CPE_RANGE"
}

Affected versions

@mattermost/client@11.*

@mattermost/client@11.7.0

@mattermost/shared@11.*

@mattermost/shared@11.7.0

@mattermost/types@11.*

@mattermost/types@11.7.0

mattermost-redux@11.*

mattermost-redux@11.7.0

v11.*

v11.6.0

v11.6.1

v11.6.1-rc1

v11.6.2

v11.6.3

v11.6.4

v11.7.0

v11.7.1

v11.7.2

Database specific

source

"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-9597.json"