CVE-2026-8683
published 2026-06-15CVE-2026-8683: Mattermost Desktop App versions <=6.1 5.5.13.0 fail to account for attempting to open extremely long URLs in the Mattermost Desktop App which allows a…
PriorityP431medium6.5CVSS 3.1
AVNACLPRNUIRSUCNINAH
EPSS
0.20%
9.9th percentile
Mattermost Desktop App versions <=6.1 5.5.13.0 fail to account for attempting to open extremely long URLs in the Mattermost Desktop App which allows a malicious server owner to crash the application via including a script to call window.open on a very large URL. Mattermost Advisory ID: MMSA-2026-00652
Affected
3 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| mattermost | mattermost | <= 5.5.13 | — |
| mattermost | mattermost_desktop | <= 5.13.0 | — |
| mattermost | mattermost_desktop | 6.1.0 – 6.1.5 | — |
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VulDB
Mattermost Desktop App up to 5.5.13/6.1.x window.open allocation of resources
vuldb·2026-06-15·CVSS 6.5
CVE-2026-8683 [MEDIUM] Mattermost Desktop App up to 5.5.13/6.1.x window.open allocation of resources
A vulnerability, which was classified as problematic, has been found in Mattermost Desktop App up to 5.5.13/6.1.x. Affected by this vulnerability is the function window.open. The manipulation leads to allocation of resources.
This vulnerability is documented as CVE-2026-8683. The attack can be initiated remotely. There is not any exploit available.
It is advisable to upgrade the affected component.
GHSA
Mattermost Desktop App versions <=6.1 5.5.13.0 fail to account for attempting to open extremely long URLs in the Mattermost Desktop App which allows a malicious server owner to crash the application v
ghsa_unreviewed·2026-06-15
CVE-2026-8683 [MEDIUM] CWE-770 Mattermost Desktop App versions <=6.1 5.5.13.0 fail to account for attempting to open extremely long URLs in the Mattermost Desktop App which allows a malicious server owner to crash the application v
Mattermost Desktop App versions <=6.1 5.5.13.0 fail to account for attempting to open extremely long URLs in the Mattermost Desktop App which allows a malicious server owner to crash the application via including a script to call window.open on a very large URL. Mattermost Advisory ID: MMSA-2026-00652
No detection rules found.
No public exploits indexed.
No writeups or analysis indexed.
2026-06-15
Published