GHSA-vqp5-2mrp-qqxg
Suggest an improvement- Source
- https://github.com/advisories/GHSA-vqp5-2mrp-qqxg
- Import Source
- https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/05/GHSA-vqp5-2mrp-qqxg/GHSA-vqp5-2mrp-qqxg.json
- JSON Data
- https://api.test.osv.dev/v1/vulns/GHSA-vqp5-2mrp-qqxg
- Aliases
- Published
- 2026-05-18T09:31:48Z
- Modified
- 2026-06-25T23:11:47Z
- Severity
-
- 3.5 (Low) CVSS_V3 - CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:N/I:L/A:N CVSS Calculator
- Summary
- Mattermost doesn't validate the Host header when constructing response URLs for custom slash command
- Details
-
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
- Database specific
{ "cwe_ids": [ "CWE-918" ], "github_reviewed": true, "github_reviewed_at": "2026-06-01T15:29:47Z", "nvd_published_at": "2026-05-18T09:16:23Z", "severity": "LOW" }- References
Affected packages
Go
github.com/mattermost/mattermost/server/v8
Package
- Name
- github.com/mattermost/mattermost/server/v8
- View open source insights on deps.dev
- Purl
- pkg:golang/github.com/mattermost/mattermost/server/v8
github.com/mattermost/mattermost/server/v8
Package
- Name
- github.com/mattermost/mattermost/server/v8
- View open source insights on deps.dev
- Purl
- pkg:golang/github.com/mattermost/mattermost/server/v8
github.com/mattermost/mattermost/server/v8
Package
- Name
- github.com/mattermost/mattermost/server/v8
- View open source insights on deps.dev
- Purl
- pkg:golang/github.com/mattermost/mattermost/server/v8
github.com/mattermost/mattermost-server
Package
- Name
- github.com/mattermost/mattermost-server
- View open source insights on deps.dev
- Purl
- pkg:golang/github.com/mattermost/mattermost-server