How severe is CVE-2025-13326?

CVE-2025-13326 has a CVSS 3.x base score of 3.9, rated low severity. It is exploitable over local access with low attack complexity, requires low privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.

Is CVE-2025-13326 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (1st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-13326?

CVE-2025-13326 affects Mattermost Mattermost Desktop. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2025-13326?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2025-13326 have an EU (EUVD) identifier?

Yes. CVE-2025-13326 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-203922.

When was CVE-2025-13326 published?

CVE-2025-13326 was published on 2025-12-17 and last updated on 2026-06-17.

CVE-2025-13326

CVE-2025-13326 is a low-severity vulnerability in Mattermost Mattermost Desktop with a CVSS 3.x base score of 3.9. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-693.

Key facts

Severity: Low (CVSS 3.x base score 3.9)
EPSS exploit prediction: 0% (1st percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-203922
Weakness: CWE-693
Affected product: Mattermost Mattermost Desktop
Published: 2025-12-17
Last modified: 2026-06-17

Description

Mattermost Desktop App versions <6.0.0 fail to enable the Hardened Runtime on the Mattermost Desktop App when packaged for Mac App Store which allows an attacker to inherit TCC permissions via copying the binary to a tmp folder.

Frequently asked questions

What is CVE-2025-13326?: Mattermost Desktop App versions <6.0.0 fail to enable the Hardened Runtime on the Mattermost Desktop App when packaged for Mac App Store which allows an attacker to inherit TCC permissions via copying the binary to a tmp folder.
How severe is CVE-2025-13326?: CVE-2025-13326 has a CVSS 3.x base score of 3.9, rated low severity. It is exploitable over local access with low attack complexity, requires low privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.
Is CVE-2025-13326 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (1st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-13326?: CVE-2025-13326 affects Mattermost Mattermost Desktop. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2025-13326?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2025-13326 have an EU (EUVD) identifier?: Yes. CVE-2025-13326 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-203922.
When was CVE-2025-13326 published?: CVE-2025-13326 was published on 2025-12-17 and last updated on 2026-06-17.

References

https://mattermost.com/security-updates

Affected products (1)

cpe:2.3:a:mattermost:mattermost_desktop:*:*:*:*:*:*:*:*

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