CVE-2026-3524

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Source

https://cve.org/CVERecord?id=CVE-2026-3524

Import Source

https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-3524.json

JSON Data

https://api.osv.dev/v1/vulns/CVE-2026-3524

Published

2026-04-06T12:06:22.092Z

Modified

2026-08-12T03:51:09.629844920Z

Severity

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

Summary

Authorization Bypass in Mattermost Legal Hold Plugin Due to Missing Return After Permission Check

Details

Mattermost Plugin Legal Hold versions <=1.1.4 fail to halt request processing after a failed authorization check in ServeHTTP which allows an authenticated attacker to access, create, download, and delete legal hold data via crafted API requests to the plugin's endpoints. Mattermost Advisory ID: MMSA-2026-00621

Database specific

{
    "unresolved_ranges": [
        {
            "extracted_events": [
                {
                    "last_affected": "1.1.4"
                }
            ],
            "source": "AFFECTED_FIELD"
        }
    ],
    "cna_assigner": "Mattermost",
    "cwe_ids": [
        "CWE-862"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/3xxx/CVE-2026-3524.json"
}

References

Affected packages

Git / github.com/mattermost/mattermost-plugin-legal-hold

Affected ranges

Type

GIT

Repo

https://github.com/mattermost/mattermost-plugin-legal-hold

Events

Introduced

Fixed

8c830da21205c49d78929e1151384ccb10e14d97

Database specific

Show details

{
    "extracted_events": [
        {
            "introduced": "0"
        },
        {
            "fixed": "1.1.5"
        }
    ],
    "source": "CPE_RANGE",
    "cpe": "cpe:2.3:a:mattermost:legal_hold:*:*:*:*:*:mattermost:*:*"
}

Affected versions

v0.*

v0.1.0

v0.2.0

v0.3.0

v0.3.1

v0.3.2

v0.3.3

v0.3.4

v0.4.0

v0.4.1

v0.4.2

v0.4.3

v0.5.0-rc1

v1.*

v1.0.0

v1.0.1

v1.0.2

v1.1.0

v1.1.0-rc1

v1.1.1

v1.1.2

v1.1.3

v1.1.4

Database specific

source

"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-3524.json"