CVE-2026-75588

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Source

https://cve.org/CVERecord?id=CVE-2026-75588

Import Source

https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-75588.json

JSON Data

https://api.osv.dev/v1/vulns/CVE-2026-75588

Published

2026-09-17T15:09:40Z

Modified

2026-10-15T02:47:33Z

Severity

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

Summary

Mattermost Desktop App plugin popout scheme validation bypass

Details

Mattermost Desktop App versions <=6.2 6.2.2.0 fail to validate the URL scheme when checking whether a target URL is internal to the connected server, which allows a network-positioned attacker to load a plugin popout window over an insecure connection via a link using a downgraded URL scheme. Mattermost Advisory ID: MMSA-2026-00717

Database specific

{
    "cna_assigner":  "Mattermost",
    "cwe_ids":  [
        "CWE-1287"
    ],
    "osv_generated_from":  "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/75xxx/CVE-2026-75588.json",
    "unresolved_ranges":  [
        {
            "extracted_events":  [
                {
                    "last_affected":  "6.2.2"
                }
            ],
            "source":  "AFFECTED_FIELD"
        }
    ]
}

References

Affected packages

Git / github.com/mattermost/desktop

Affected ranges

Type

GIT

Repo

https://github.com/mattermost/desktop

Events

Introduced

200c274b361a2dcb7d7e8208adc44bdcd4645616

Fixed

99b6258eda51936ee4004a4e0175db06d65cc106

Database specific

Show details

{
    "cpe":  "cpe:2.3:a:mattermost:mattermost_desktop:*:*:*:*:*:*:*:*",
    "extracted_events":  [
        {
            "introduced":  "6.2.0"
        },
        {
            "fixed":  "6.2.3"
        }
    ],
    "source":  "CPE_RANGE"
}

Affected versions

v6.*

v6.2.0

v6.2.0-mas.1

v6.2.1

v6.2.1-mas.1

v6.2.1-mas.2

v6.2.1-rc.1

v6.2.2

v6.2.2-mas.1

v6.2.2-rc.1

v6.2.3-rc.1

v6.2.3-rc.2

Database specific

source

"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-75588.json"