Project Subscriptions
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 |
|
Tue, 19 May 2026 18:15:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Metrics |
ssvc
|
Tue, 19 May 2026 18:00:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| First Time appeared |
Mattermost mattermost Server
|
|
| CPEs | cpe:2.3:a:mattermost:mattermost_server:*:*:*:*:*:*:*:* | |
| Vendors & Products |
Mattermost mattermost Server
|
Mon, 18 May 2026 10:45:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| First Time appeared |
Mattermost
Mattermost mattermost |
|
| Vendors & Products |
Mattermost
Mattermost mattermost |
Mon, 18 May 2026 09:00:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Description | Mattermost versions 11.5.x <= 11.5.1, 10.11.x <= 10.11.13 fail to validate the Host header when constructing response URLs for custom slash commands which allows an authenticated attacker to redirect slash command responses to an attacker-controlled server via a spoofed Host header.. Mattermost Advisory ID: MMSA-2026-00582 | |
| Title | SSRF via Host Header Spoofing in Custom Slash Commands | |
| Weaknesses | CWE-918 | |
| References |
| |
| Metrics |
cvssV3_1
|
Projects
Sign in to view the affected projects.
Status: PUBLISHED
Assigner: Mattermost
Published:
Updated: 2026-05-19T17:19:42.466Z
Reserved: 2026-04-15T08:51:33.309Z
Link: CVE-2026-6333
Updated: 2026-05-18T14:36:17.582Z
Status : Analyzed
Published: 2026-05-18T09:16:23.430
Modified: 2026-05-19T17:51:43.453
Link: CVE-2026-6333
No data.
OpenCVE Enrichment
Updated: 2026-05-18T10:30:23Z