# @backstage/plugin-auth-backend (npm) vulnerabilities

4 known vulnerabilities (1 high, 2 medium, 1 low), with the versions each affects and the releases that fix them.

## At a glance

- Latest release: not known (cve.now hasn't read this package's releases)
- Newest unaffected release: not known without release data
- Registry: https://www.npmjs.com/package/@backstage/plugin-auth-backend

## Advisories (4)

### [CVE-2026-73563](https://cve.now/CVE-2026-73563): Backstage: Unauthenticated OAuth account takeover via \`redirect\_uri\` allowlist bypass in \`@backstage/plugin-auth-backend\`

- Severity: Medium 4.7
- Published: Aug 13, 2026
- Affected: fixed in 0.29.2.

### [CVE-2026-32236](https://cve.now/CVE-2026-32236): @backstage/plugin-auth-backend: SSRF in experimental CIMD metadata fetch

- Severity: Low 1.7
- Published: Mar 12, 2026
- Affected: fixed in 0.27.1.

### [CVE-2026-32235](https://cve.now/CVE-2026-32235): @backstage/plugin-auth-backend: OAuth redirect URI allowlist bypass

- Severity: Medium 5.9
- Published: Mar 12, 2026
- Affected: fixed in 0.27.1.

### [CVE-2021-43776](https://cve.now/CVE-2021-43776): XSS vulnerability in @backstage/plugin-auth-backend

- Severity: High 7.4
- Published: Nov 26, 2021
- Affected: fixed in 0.4.9.

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