CVE-2026-4643
Last modified
CVE-2026-4643 is a low-severity vulnerability rated 3.5/10 on the CVSS scale. Mattermost Desktop App versions <=6.1 6.0.1 5.4.13.0 fail to prevent server-rendered content from closing an underlying application view in the Mattermost Desktop App which allows a malicious server or plugin to crash the desktop client via invoking {{window.close()}} in the renderer context, leading to a denial of service condition at the client level. Mattermost Advisory ID: MMSA-2026-00633. EPSS estimates a 0.17% chance of exploitation in the next 30 days.
Description
Mattermost Desktop App versions <=6.1 6.0.1 5.4.13.0 fail to prevent server-rendered content from closing an underlying application view in the Mattermost Desktop App which allows a malicious server or plugin to crash the desktop client via invoking {{window.close()}} in the renderer context, leading to a denial of service condition at the client level. Mattermost Advisory ID: MMSA-2026-00633
Metrics
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:N/A:L
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Mattermost | Mattermost Desktop | <= 5.4.13.0 |
| Mattermost | Mattermost Desktop | >= 6.0.0, <= 6.0.1 |
| Mattermost | Mattermost Desktop | >= 6.1.0, < 6.2.0 |
References
- https://mattermost.com/security-updatesVendor Advisory
Timeline
- Published
- Last Modified
- Status
- Analyzed
Frequently Asked Questions
What is CVE-2026-4643?
How severe is CVE-2026-4643?
How do I fix CVE-2026-4643?
How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
- Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
- PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
- AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.
Related CVEs from 2026
- CVE-2026-46423Rocket.Chat is an open-source, secure, fully customizable co…9.3
- CVE-2026-46424Budibase is an open-source low-code platform. Prior to 3.38.…4.2
- CVE-2026-46425Budibase is an open-source low-code platform. Prior to 3.38.…9.9
- CVE-2026-46426Budibase is an open-source low-code platform. Prior to 3.38.…7.6
- CVE-2026-46427Budibase is an open-source low-code platform. Prior to 3.38.…7.7
- CVE-2026-46428lettre is a a mailer library for Rust. Starting in version 0…9.1
- CVE-2026-46430Algernon is a small self-contained pure-Go web server. Prior…4.3
- CVE-2026-46431Algernon is a small self-contained pure-Go web server. Prior…4.3
- CVE-2026-46432LMDeploy is a toolkit for compressing, deploying, and servin…7.8
- CVE-2026-46433lldpd is an implementation of IEEE 802.1ab (LLDP). Prior to …6.5
- CVE-2026-46440Flowise is a drag & drop user interface to build a customize…9.1
- CVE-2026-46441Flowise is a drag & drop user interface to build a customize…9.6
Are you affected by CVE-2026-4643?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST