EUVD-2026-58177Published
Backstage: Unauthenticated OAuth account takeover via `redirect_uri` allowlist bypass in `@backstage/plugin-auth-backend`
Explicit identifiers and source references
These records connect through source-stated identifiers. Shared identifiers or dates alone do not establish shared exposure, root cause or applicability.
CVE-2026-73563 · Microsoft / collected KEV context
cve-program · CVE-2026-73563
euvd · EUVD-2026-58177
nvd · CVE-2026-73563
osv · GHSA-38hq-7x33-php4
- https://github.com/backstage/backstage/security/advisories/GHSA-38hq-7x33-php4
- https://github.com/backstage/backstage/commit/274acc51d22a7dd919cdda49d9086cf12c0b8711
- https://github.com/backstage/backstage/commit/6370e53bce8b227c63092300594ffde29c006886
- https://github.com/backstage/backstage/commit/ef606a85545cb6d765e20afd1ff43ae5407a3660
- https://github.com/backstage/backstage/commit/fdc0d2dcd9a571e3839d7f5de4133c4e242a3a41
- https://github.com/backstage/backstage
- https://github.com/backstage/backstage/releases/tag/v1.53.0
Related operational evidence
Explicit CVE identifiersNo related operational record is retained in the current change model.