GHSA-j76w-p754-g2w7
Suggest an improvement- Source
- https://github.com/advisories/GHSA-j76w-p754-g2w7
- Import Source
- https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/05/GHSA-j76w-p754-g2w7/GHSA-j76w-p754-g2w7.json
- JSON Data
- https://api.osv.dev/v1/vulns/GHSA-j76w-p754-g2w7
- Aliases
- Published
- 2026-05-15T21:31:33Z
- Modified
- 2026-06-25T23:11:39Z
- Severity
-
- 4.3 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L CVSS Calculator
- Summary
- Mattermost doesn't validate the response body of proxied images
- Details
-
Mattermost versions 11.5.x <= 11.5.1, 10.11.x <= 10.11.13, 11.4.x <= 11.4.3 fail to validate the response body of proxied images, which allows a remote attacker to enact client-side DoS via an SVG file served from an attacker-controlled origin under a non-SVG Content-Type header (e.g. image/png) embedded in an og:image meta tag or Markdown image link. Mattermost Advisory ID: MMSA-2026-00630.
- Database specific
{ "cwe_ids": [ "CWE-754" ], "github_reviewed": true, "github_reviewed_at": "2026-05-28T19:28:48Z", "nvd_published_at": "2026-05-15T19:17:04Z", "severity": "MODERATE" }- References
Affected packages
Go
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
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
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