SSRF in @Backstage Plugin-Techdocs-Node
CVE-2026-106455
Backstage is an open framework for building developer portals. From 0.11.12 until 1.14.7 and 1.15.5, the @backstage/plugin-techdocs-node package is affected by improper validation of mkdocs plugin configuration in techdocs. An authenticated attacker with control over a TechDocs source repository could cause a documentation build to retrieve and publish data from network locations reachable by the build environment. Exposure depends on deployment topology, build mode, and target endpoint protections. Modern cloud metadata services that require tokens or special headers are not directly accessible through the affected behavior. This issue is fixed in @backstage/plugin-techdocs-node versions 1.14.7 and 1.15.5.
Vulnerability class: SSRF (Server-Side Request Forgery)
Published .
CVSS v3 metric
CVSS v3 base score 7.7 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N.
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 >= 0.11.12, < 1.14.7, >= 1.15.0, < 1.15.5
- Backstage — versions >= 0.71.1, < 1.50.6, >= 1.51.0-next.0, < 1.54.8
Weakness classification (CWE)
References
- github.com/backstage/backstage/security/advisories/GHSA-q38j-6vcm-2f5m
- github.com/backstage/backstage/commit/28aa82ae2815988721dd7bbf43cd69c431dcd71b
- github.com/backstage/backstage/commit/9f76ea445088961f68c364764cc4b7734f368fc0
- github.com/backstage/backstage/releases/tag/v1.50.6
- github.com/backstage/backstage/releases/tag/v1.54.8
- github.com/backstage/backstage/releases/tag/v1.55.0
Frequently asked questions
- What is CVE-2026-106455?
- CVE-2026-106455 is a high-severity vulnerability in @Backstage Plugin-Techdocs-Node, classified under Server-Side Request Forgery (SSRF). CVSS score: 7.7/10. Published 2026-10-06.
- How severe is CVE-2026-106455?
- High severity. CVSS v3 base score is 7.7 out of 10.