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

5 known vulnerabilities (1 high, 3 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
- Weekly downloads: 218.7K
- Dependents: 20
- Registry: https://www.npmjs.com/package/@backstage/plugin-catalog-backend

## Advisories (5)

### [CVE-2026-115923](https://cve.now/CVE-2026-115923): Backstage catalog rules can be bypassed for URL locations using encoded path segments

- Severity: Medium 6.5
- Published: Oct 26, 2026
- Affected: fixed in 3.9.2; from 4.0.0, fixed in 4.0.2.

### [CVE-2026-106498](https://cve.now/CVE-2026-106498): Backstage: Improper URL validation in catalog entity placeholder resolution

- Severity: High 7.7
- Published: Oct 6, 2026
- Affected: fixed in 3.9.1.

### [CVE-2026-106496](https://cve.now/CVE-2026-106496): Backstage: Inconsistent enforcement of allowed location types during catalog processing

- Severity: Low 3.1
- Published: Oct 6, 2026
- Affected: fixed in 3.9.1.

### [CVE-2024-45815](https://cve.now/CVE-2024-45815): Prototype pollution in @backstage/plugin-catalog-backend

- Severity: Medium 6.5
- Published: Sep 17, 2024
- Affected: fixed in 1.26.0.

### [CVE-2023-25571](https://cve.now/CVE-2023-25571): Backstage has XSS Vulnerability in Software Catalog

- Severity: Medium 6.8
- Published: Feb 14, 2023
- Affected: fixed in 1.7.2.

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