CVE-2026-106509
Backstage is an open framework for building developer portals. Prior to 1.14.6, the @backstage/plugin-techdoc…
Backstage is an open framework for building developer portals. Prior to 1.14.6, the @backstage/plugin-techdocs-node package is affected by improper validation of mkdocs theme configuration in techdocs. When TechDocs is configured to build documentation locally or in a container, a user with write access to a registered repository can include configuration values in mkdocs.yml that cause arbitrary code execution during the documentation build process. This issue is fixed in versions 1.14.6 and 1.15.4.
- Vendor
- linuxfoundation
- Product
- backstage plugin-techdocs-node
- CVSS 3.1
- 8.8 (high), scored by NVD (primary)CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- CVSS 3.1
- 7.7 (high), scored by security-advisories@github.comCVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:L/A:L
- Published
- 2026-10-06
- NVD modified
- 2026-10-09
- NVD status
- Analyzed
Not in the CISA KEV catalogue at the last update.
EPSS
0.37% chance of exploitation in the next 30 days (percentile 29th)
FIRST EPSS, updated 17 Oct 2026. About EPSS
CVSS is severity, EPSS is likelihood, KEV means already exploited. EPSS is a statistical probability, not a certainty: a low score does not make a bug safe, and a high one does not prove it is being exploited.
References
- github.com (Release Notes)
- github.com (Release Notes)
- github.com (Vendor Advisory, Mitigation)
Data last updated 18 Oct 2026. Sources: NVD API 2.0, FIRST EPSS. Links: NVD, CISA KEV. Metadata only. ThreatWire does not host exploit code.