CVE-2026-1628
Last modified
CVE-2026-1628 is a medium-severity vulnerability rated 4.6/10 on the CVSS scale. 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. EPSS estimates a 0.14% chance of exploitation in the next 30 days.
Description
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
Metrics
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:N
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Mattermost | Mattermost Desktop | < 5.13.4 |
References
- https://mattermost.com/security-updatesVendor Advisory
Timeline
- Published
- Last Modified
- Status
- Analyzed
Frequently Asked Questions
What is CVE-2026-1628?
How severe is CVE-2026-1628?
How do I fix CVE-2026-1628?
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- CVE-2026-1627An attacker may exploit the use of outdated and weak MAC alg…8.1
- CVE-2026-16270Open Mercato does not validate regex rules. An attacker with…6.9
- CVE-2026-16273The Narrative Publisher WordPress plugin through 1.0.7 does …4.6
- CVE-2026-16274The Classified Listing WordPress plugin before 5.4.4 does n…2.7
- CVE-2026-16276The Classified Listing WordPress plugin before 5.4.4 does n…2.7
- CVE-2026-16277A stack-based buffer overflow was found in rpcbind's rpcinfo…6.5
- CVE-2026-16280An integer overflow when calculating physical offsets for sp…9.8
- CVE-2026-16282The Appointment Hour Booking WordPress plugin before 1.5.88…5.3
- CVE-2026-16285The Product Attachment for WooCommerce WordPress plugin befo…7.5
- CVE-2026-16287Improper neutralization of special elements used in an OS co…7.8
- CVE-2026-16289The ProfileGrid WordPress plugin before 6.0.0.0 does not pe…4.3
- CVE-2026-1629Mattermost versions 10.11.x <= 10.11.10 Fail to invalidate c…4.3
Are you affected by CVE-2026-1628?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST