5.3
CVE-2026-4635
- EPSS 0.17%
- Veröffentlicht 22.05.2026 10:28:47
- Zuletzt bearbeitet 23.07.2026 16:10:00
- Erkennungen
Persistent notification timing attack causing server denial of service
Mattermost versions 11.6.x <= 11.6.0, 11.5.x <= 11.5.3, 11.4.x <= 11.4.4, 10.11.x <= 10.11.14 fail to archive the channel before removing persistent notifications which allows authenticated user to crash the server via timing the creation of persistent notification message between the server deleting existing persistent notifications and archiving the channel.. Mattermost Advisory ID: MMSA-2026-00637
Daten sind bereitgestellt durch National Vulnerability Database (NVD)
Mattermost ≫ Mattermost Server Version >= 10.11.0 < 10.11.15
Mattermost ≫ Mattermost Server Version >= 11.4.0 < 11.4.5
Mattermost ≫ Mattermost Server Version >= 11.5.0 < 11.5.4
Mattermost ≫ Mattermost Server Version >= 11.6.0 < 11.6.1
VulnDex Vulnerability Enrichment
Diese Information steht angemeldeten Benutzern zur Verfügung. 
Login
Login| Typ | Quelle | Score | Percentile |
|---|---|---|---|
| EPSS | FIRST.org | 0.17% | 0.068 |
| Quelle | Base Score | Exploit Score | Impact Score | Vector String |
|---|---|---|---|---|
| NIST | 5.3 | 1.6 | 3.6 |
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H
|
| responsibledisclosure@mattermost.com | 6.5 | 2.8 | 3.6 |
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
|
CWE-362 Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')
The product contains a concurrent code sequence that requires temporary, exclusive access to a shared resource, but a timing window exists in which the shared resource can be modified by another code sequence operating concurrently.
https://mattermost.com/security-updates