GHSA-wqvh-63mv-9w92
Suggest an improvement- Source
- https://github.com/advisories/GHSA-wqvh-63mv-9w92
- Import Source
- https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/03/GHSA-wqvh-63mv-9w92/GHSA-wqvh-63mv-9w92.json
- JSON Data
- https://api.osv.dev/v1/vulns/GHSA-wqvh-63mv-9w92
- Aliases
- Published
- 2026-03-12T14:50:59Z
- Modified
- 2026-03-14T01:46:41.642750Z
- Severity
-
- 5.9 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:L/A:N CVSS Calculator
- Summary
- @backstage/plugin-auth-backend: OAuth redirect URI allowlist bypass
- Details
-
Impact
The experimental OIDC provider in
@backstage/plugin-auth-backendis vulnerable to a redirect URI allowlist bypass. Instances that have enabled experimental Dynamic Client Registration or Client ID Metadata Documents and configuredallowedRedirectUriPatternsare affected.A specially crafted redirect URI can pass the allowlist validation while resolving to an attacker-controlled host. If a victim approves the resulting OAuth consent request, their authorization code is sent to the attacker, who can exchange it for a valid access token.
This requires victim interaction and that one of the experimental features is explicitly enabled, which is not the default.
Patches
Upgrade to
@backstage/plugin-auth-backendversion 0.27.1 or later.Workarounds
Disable experimental Dynamic Client Registration and Client ID Metadata Documents features if they are not required.
References
- Database specific
{ "github_reviewed_at": "2026-03-12T14:50:59Z", "nvd_published_at": "2026-03-12T19:16:17Z", "cwe_ids": [ "CWE-20", "CWE-601" ], "severity": "MODERATE", "github_reviewed": true }- References
Affected packages
npm / @backstage/plugin-auth-backend
Package
- Name
- @backstage/plugin-auth-backend
- View open source insights on deps.dev
- Purl
- pkg:npm/%40backstage/plugin-auth-backend