Backstage is an open framework for building developer portals. Prior to 0.6.17, the @backstage/plugin-proxy-backend package is affected by improper input validation in proxy-backend. An authenticated Backstage user could craft a request URL that causes the proxy-backend to forward the request to a path outside the configured base path on the target server. This is limited to target servers already configured as proxy endpoints and requires Backstage authentication by default. This issue is fixed in version 0.6.17.
References
| Link | Resource |
|---|---|
| https://github.com/backstage/backstage/commit/233287d0ce3133e41549bf92a7470c940a41753c | Patch |
| https://github.com/backstage/backstage/releases/tag/v1.54.6 | Patch Release Notes |
| https://github.com/backstage/backstage/security/advisories/GHSA-9ghw-48h5-v2w5 | Mitigation Vendor Advisory |
Configurations
History
22 Oct 2026, 14:10
| Type | Values Removed | Values Added |
|---|---|---|
| CPE | cpe:2.3:a:linuxfoundation:backstage\/plugin-proxy-backend:*:*:*:*:*:node.js:*:* cpe:2.3:a:linuxfoundation:backstage:*:*:*:*:*:*:*:* |
|
| References | () https://github.com/backstage/backstage/commit/233287d0ce3133e41549bf92a7470c940a41753c - Patch | |
| References | () https://github.com/backstage/backstage/releases/tag/v1.54.6 - Patch, Release Notes | |
| References | () https://github.com/backstage/backstage/security/advisories/GHSA-9ghw-48h5-v2w5 - Mitigation, Vendor Advisory | |
| First Time |
Linuxfoundation
Linuxfoundation backstage Linuxfoundation backstage\/plugin-proxy-backend |
06 Oct 2026, 21:17
| Type | Values Removed | Values Added |
|---|---|---|
| New CVE |
Information
Published : 2026-10-06 21:17
Updated : 2026-10-22 14:10
NVD link : CVE-2026-106491
Mitre link : CVE-2026-106491
CVE.ORG link : CVE-2026-106491
JSON object : View
Products Affected
linuxfoundation
- backstage\/plugin-proxy-backend
- backstage