CVE-2026-8075

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Source
https://cve.org/CVERecord?id=CVE-2026-8075
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-8075.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-8075
Published
2026-07-17T10:05:06.211Z
Modified
2026-08-16T03:48:37.476374783Z
Severity
  • 6.5 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H CVSS Calculator
Summary
Posting a malicious markdown image crashes the Mattermost Desktop App
Details

Mattermost Desktop App versions <=6.2 5.5.13 6.0.2.0 fail to properly null check when checking for headers in the Mattermost Desktop App which allows any user to crash another channel members Desktop App via posting a malicious link with an embedded image that misses one of those headers. Mattermost Advisory ID: MMSA-2026-00668

Database specific 
{
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/8xxx/CVE-2026-8075.json",
    "unresolved_ranges": [
        {
            "source": "AFFECTED_FIELD",
            "extracted_events": [
                {
                    "last_affected": "5.5.13"
                },
                {
                    "last_affected": "6.0.2"
                }
            ]
        }
    ],
    "cwe_ids": [
        "CWE-754"
    ],
    "cna_assigner": "Mattermost"
}
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
0da9b0cb34c4159e37f8e8a904d4c1ad7f8d993c
Fixed
274602892a4391ac8c455cc09bdb52632ab282a9
Introduced
30a408117be7b1f7adb21f0a70dd1610c2e6eaaa
Fixed
9569d76bd8de2f8255fe80f0b9379dc429198c82
Database specific
Show details 
{
    "source": "CPE_RANGE",
    "cpe": "cpe:2.3:a:mattermost:mattermost_desktop:*:*:*:*:*:*:*:*",
    "extracted_events": [
        {
            "introduced": "5.5.13"
        },
        {
            "fixed": "5.13.6"
        },
        {
            "introduced": "0"
        },
        {
            "fixed": "6.3"
        },
        {
            "introduced": "6.0.2"
        },
        {
            "fixed": "6.2.1"
        }
    ]
}

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
v5.13.4-rc.1
v5.13.5
v5.13.5-rc.1
v5.13.6-rc.1
v5.13.6-rc.2
v6.*
v6.2.0
v6.2.0-mas.1
v6.2.0-rc.1
v6.2.0-rc.2
v6.2.0-rc.3
v6.2.1-mas.1
v6.2.1-rc.1
v6.3.0-mas.1
v6.3.0-rc.1
v6.3.0-rc.2
v6.3.0-rc.3

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-8075.json"