CVE-2026-106507CWE-59CWE-61

CVE-2026-106507

Medium · published October 7, 2026

CVSS v3.1
5.3
EPSS
0%
Percentile
31.8
In the wild
Unconfirmed
What it is

Backstage is an open framework for building developer portals. Prior to 1.15.4, the @backstage/plugin-techdocs-node package is affected by techdocs arbitrary file read via mkdocs snippets. Unsafe path resolution in TechDocs source tree handling allows an authenticated user who can register documentation sources to include content from outside the intended documentation boundary. Depending on deployment, this may expose files readable by the build process. This issue is fixed in version 1.15.4.

The record
Technical detail
CVSS v3.1
5.3 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N
CVSS v4.0
Not supplied
EPSS
0.00389 · 31.8th percentile
Weaknesses
CWE-59 · Improper Link Resolution Before File Access ('Link Following'); CWE-61 · UNIX Symbolic Link (Symlink) Following
Published
2026-10-07T02:17Z
Affected products (2)
ProductVersionsFixed in
linuxfoundation/backstage_plugin-techdocs-node< 1.15.41.15.4
linuxfoundation/backstage< 1.54.61.54.6
References (3)
https://github.com/backstage/backstage/commit/911ca36f10e654c5517da029129230fc05a4f580 · [email protected]https://github.com/backstage/backstage/releases/tag/v1.54.6 · [email protected]https://github.com/backstage/backstage/security/advisories/GHSA-vmqh-7cj9-mvcj · [email protected]
EPSS history
Timeline
  • 08 OCT 03:27Z
    EPSS moved — → 0%
    epss
  • 06 OCT 21:46Z
    Backstage: TechDocs arbitrary file read via mkdocs snippets
    cvelistv5