CVE-2026-73563Published

Backstage: Unauthenticated OAuth account takeover via `redirect_uri` allowlist bypass in `@backstage/plugin-auth-backend`

cve-program · CVE-2026-73563

Published

backstage

Vendor product

Original vendor version evidence · not evaluated as a NuGet range

{
                    "vendor": "backstage",
                    "product": "backstage",
                    "versions": [
                        {
                            "version": "< 0.29.2",
                            "status": "affected"
                        }
                    ]
                }

Original source record · Cite this exact observation · Complete original publisher JSON

euvd · EUVD-2026-58177

Published

EUVD source date text has no stated timezone and is retained without inventing a UTC instant. Related bulletin membership is not an alias, common cause or applicability claim. A missing vector with a zero score is treated as unrated. Complete vendor/product and underlying source evidence remains in the original JSON.

Original publisher date fields

datePublished: Aug 13, 2026, 5:32:39 PM

dateUpdated: Aug 13, 2026, 6:07:45 PM

2 related source bulletins · separate from aliases

RHSA-2026:65155: Red Hat Security Advisory: Ansible plug-ins for Red Hat Developer Hub Product Release Update

CVE-2026-67213 · CVE-2026-67214 · CVE-2026-73563 · CVE-2026-73566 · CVE-2026-75838 · CVE-2026-75899 · CVE-2026-75931 · CVE-2026-75975 · CVE-2026-76172 · CVE-2026-84292 · CVE-2026-84394

RHSA-2026:65118: Red Hat Security Advisory: Ansible plug-ins for Red Hat Developer Hub Product Release Update

CVE-2026-5079 · CVE-2026-67213 · CVE-2026-67214 · CVE-2026-67313 · CVE-2026-67314 · CVE-2026-67320 · CVE-2026-67321 · CVE-2026-73563 · CVE-2026-73566 · CVE-2026-75838 · CVE-2026-75899 · CVE-2026-75931 · CVE-2026-75975 · CVE-2026-76172 · CVE-2026-84292 · CVE-2026-84394

No normalized affected-package data is projected for this source revision. The original publisher record may contain additional product and version evidence; this does not establish that a package is unaffected.

Original source record · Cite this exact observation · Complete original publisher JSON

nvd · CVE-2026-73563

Published

NVD analysis and CPE criteria are source context, not proof that a package or your environment is affected. Complete affected data, logical configurations and SSVC are retained in the original JSON.

Source analysis status: Analyzed

Weakness classifications: CWE-601

Original publisher date fields

published: 2026-08-13T18:18:18.803

lastModified: 2026-10-15T20:37:36.210

1 source CPE criteria · context only

cpe:2.3:a:linuxfoundation:backstage\/plugin-auth-backend:*:*:*:*:*:node.js:*:*

The original JSON retains the logical configuration operators, exclusions and version bounds.

Original source record · Cite this exact observation · Complete original publisher JSON

osv · GHSA-38hq-7x33-php4

Published

@backstage/plugin-auth-backend

npm

SEMVER · introduced 0 → fixed 0.29.2

Original source record · Cite this exact observation · Complete original publisher JSON