Dashboard / CVE-2026-106491

CVE-2026-106491

MEDIUM
MEDIUM Priority: 0.02 BB Relevance: 63/100
Published: 2026-10-06 Modified: 2026-10-22 First seen: 2026-10-29 Status: active

Attack Surface

Network Low Complexity No Interaction Scope Change

CVSS Vector Breakdown

AV: Network
AC: Low
PR: Low
UI: None
S: Changed
C: Low
I: Low
A: None

Description

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.

Weakness Classification (2)

Affected Software (2)

VendorProductVersion
linuxfoundation backstage < 1.54.6
linuxfoundation backstage\/plugin-proxy-backend < 0.6.17

References & Advisories (3)

Bug Bounty Relevance

63 / 100
✓ Network accessible
✓ Low complexity
✓ No user interaction

CVSS Score

6.4 / 10.0 v3.1
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N

EPSS — Exploitation Probability

0.27%
Raw Score 0.002750
Percentile 19.9%
Date 2026-10-29

EPSS Trend

2026-10-29
0.00275
2026-10-28
0.00275

Intelligence Sources

nvd ref →

External Links