CVE-2026-106494CWE-22CWE-73path-traversal

CVE-2026-106494

Medium · published October 7, 2026

CVSS v3.1
4.4
EPSS
0%
Percentile
20.0
In the wild
Unconfirmed
What it is

Backstage is an open framework for building developer portals. Prior to 0.17.8, the @backstage/backend-defaults package is affected by improper input validation in cloud storage url readers. An attacker with write access to a cloud storage bucket used by Backstage could craft object names that could collide with protected files in the output directory. In certain deployment configurations, this could lead to content injection. This issue is fixed in version 0.17.8.

The record
Technical detail
CVSS v3.1
4.4 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:N/I:H/A:N
CVSS v4.0
Not supplied
EPSS
0.00286 · 20.0th percentile
Weaknesses
CWE-22 · Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal'); CWE-73 · External Control of File Name or Path
Published
2026-10-07T01:17Z
Affected products (2)
ProductVersionsFixed in
linuxfoundation/backstage\/backend_defaults< 0.17.80.17.8
linuxfoundation/backstage< 1.54.61.54.6
References (3)
https://github.com/backstage/backstage/commit/14e925ce5b905dd8daa64c3009722febda76034c · [email protected]https://github.com/backstage/backstage/releases/tag/v1.54.6 · [email protected]https://github.com/backstage/backstage/security/advisories/GHSA-7649-wm97-w3j3 · [email protected]
EPSS history
Timeline
  • 08 OCT 03:27Z
    EPSS moved — → 0%
    epss
  • 06 OCT 20:54Z
    Backstage: Improper input validation in cloud storage URL readers
    cvelistv5