Vulnerability in @Backstage Plugin-Techdocs-Node
CVE-2026-106505
Backstage is an open framework for building developer portals. Prior to 1.14.6 and 1.15.4, the @backstage/plugin-techdocs-node package is affected by bypass of mkdocs configuration sanitizer in techdocs backend. Users with the ability to commit changes to a repository that uses TechDocs can circumvent the MkDocs configuration file sanitizer introduced in response to CVE-2026-25153 and execute arbitrary code on the TechDocs backend host during documentation generation. This issue is fixed in versions 1.14.6 and 1.15.4.
Published .
CVSS v3 metric
CVSS v3 base score 7.7 (High). Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:L/A:L.
EPSS exploit prediction
No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.
Affected products
- @Backstage Plugin-Techdocs-Node — versions < 1.14.6, >= 1.15.0, < 1.15.4
- Backstage — versions < 1.50.5, >= 1.51.0-next.0, < 1.54.6
Weakness classification (CWE)
References
- github.com/backstage/backstage/security/advisories/GHSA-p75x-jh7p-ppcx
- github.com/backstage/backstage/commit/a7d995f11a5d27f0efbdbe8bb6c21b06988c79c9
- github.com/backstage/backstage/commit/ef92d3d2b76046205c580e7152956514c15640db
- github.com/backstage/backstage/releases/tag/v1.50.5
- github.com/backstage/backstage/releases/tag/v1.54.6
Frequently asked questions
- What is CVE-2026-106505?
- CVE-2026-106505 is a high-severity vulnerability in @Backstage Plugin-Techdocs-Node, classified under Untrusted Search Path. CVSS score: 7.7/10. Published 2026-10-06.
- How severe is CVE-2026-106505?
- High severity. CVSS v3 base score is 7.7 out of 10.