No advisories yet.
Solution
Update Mattermost to versions 11.6.0, 11.5.2, 10.11.14 or higher.
Workaround
No workaround given by the vendor.
| Link | Providers |
|---|---|
| https://mattermost.com/security-updates |
|
Mon, 18 May 2026 15:30:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Metrics |
ssvc
|
Mon, 18 May 2026 09:45:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| First Time appeared |
Mattermost
Mattermost mattermost |
|
| Vendors & Products |
Mattermost
Mattermost mattermost |
Mon, 18 May 2026 08:00:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Description | Mattermost versions 11.5.x <= 11.5.1, 10.11.x <= 10.11.13 fail to validate that the RefreshedToken differs from the original invite token during remote cluster invite confirmation which allows an authenticated attacker to bypass token rotation and reuse the original invite token via sending a crafted invite confirmation with a RefreshedToken matching the original token. Mattermost Advisory ID: MMSA-2026-00575 | |
| Title | Insufficient token rotation validation in remote cluster invite confirmation | |
| Weaknesses | CWE-863 | |
| References |
| |
| Metrics |
cvssV3_1
|
Projects
Sign in to view the affected projects.
Status: PUBLISHED
Assigner: Mattermost
Published:
Updated: 2026-05-18T14:34:29.961Z
Reserved: 2026-03-16T15:08:11.383Z
Link: CVE-2026-4273
Updated: 2026-05-18T14:34:24.408Z
Status : Undergoing Analysis
Published: 2026-05-18T08:16:14.180
Modified: 2026-05-18T17:32:38.127
Link: CVE-2026-4273
No data.
OpenCVE Enrichment
Updated: 2026-05-18T09:30:22Z