CVE-2026-1628

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Source
https://cve.org/CVERecord?id=CVE-2026-1628
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-1628.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-1628
Published
2026-03-02T13:24:21.391Z
Modified
2026-07-15T01:49:13.091522067Z
Severity
  • 4.6 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:N CVSS Calculator
Summary
Mattermost allows external websites to open within the app, exposing preload functionality to non-trusted sites.
Details

Mattermost Desktop App versions <=5.13.3 fail to attach listeners restricting navigation to external sites within the Mattermost app which allows a malicious server to expose preload script functionality to untrusted servers via having a user open an external link in their Mattermost server. Mattermost Advisory ID: MMSA-2026-00596

Database specific 
{
    "cna_assigner": "Mattermost",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/1xxx/CVE-2026-1628.json",
    "cwe_ids": [
        "CWE-829"
    ],
    "unresolved_ranges": [
        {
            "source": "AFFECTED_FIELD",
            "extracted_events": [
                {
                    "last_affected": "5.13.3"
                }
            ]
        }
    ]
}
References

Affected packages

Git / github.com/mattermost/desktop

Affected ranges

Type
GIT
Repo
https://github.com/mattermost/desktop
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Fixed
1d0a3d770e85fd31fc758f880cdc3a74e7d39a34
Database specific 
{
    "cpe": "cpe:2.3:a:mattermost:mattermost_desktop:*:*:*:*:*:*:*:*",
    "source": "CPE_RANGE",
    "extracted_events": [
        {
            "introduced": "0"
        },
        {
            "fixed": "5.13.4"
        }
    ]
}

Affected versions

4.*
4.7.0-beta
Other
beta2
v0.*
v0.1.0
v0.2.0
v0.3.0
v0.4.0
v0.5.0
v0.5.1
v1.*
v1.0.0
v1.0.1
v1.0.2
v1.0.3
v1.0.4
v1.0.5
v1.0.6
v1.0.7
v1.1.0
v1.1.1
v1.2.0
v1.3.0
v1.3.0-rc1
v1.3.0-rc2
v4.*
v4.7.0-beta2
v5.*
v5.13.0
v5.13.0-mas.1
v5.13.0-rc.1
v5.13.1
v5.13.1-mas.1
v5.13.1-rc.1
v5.13.1-rc.2
v5.13.2
v5.13.2-mas.1
v5.13.2-rc.1
v5.13.3
v5.13.3-rc.1
v5.13.4-rc.1

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-1628.json"