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

2026-10-28T02:30:22Z

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": [
                {
                    "range": [
                        {
                            "last_affected": "6.2.2"
                        }
                    ],
                    "source": "AFFECTED_FIELD",
                    "strategy": "StandardRange"
                }
            ]
        }
    ]
}

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

{
    "extracted_events": [
        {
            "cpe": "cpe:2.3:a:mattermost:mattermost_desktop:*:*:*:*:*:*:*:*",
            "range": [
                {
                    "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"