CVE-2026-106556
Prior to 1.14.6, the @backstage/plugin-techdocs-node package is affected by configuration bypass in techdocs mkdocs.yml sanitization.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (0.26%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
Backstage is an open framework for building developer portals. Prior to 1.14.6, the @backstage/plugin-techdocs-node package is affected by configuration bypass in techdocs mkdocs.yml sanitization. Insufficient validation of MkDocs configuration during TechDocs generation could allow an authenticated user who can register or modify documentation sources to execute arbitrary commands in the build environment. Impact is limited to resources accessible to the TechDocs backend or build container. This issue is fixed in versions 1.14.6 and 1.15.4.
- CVSS 3.1
- 7.7 HIGHCVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:L/A:L
- EPSS
- 0.26% probability · 17th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Weakness
- CWE-78, CWE-184
- Affected
- linuxfoundation/backstage · linuxfoundation/backstage plugin-techdocs-node
- Source
- security-advisories@github.com
EPSS moved from 0.3% on 8 October 2026 to 0.3% on 26 October 2026.
References
- https://github.com/backstage/backstage/commit/25125ee727a3de3418a8fa6a9e458cd5b73ecf26Patch
- https://github.com/backstage/backstage/commit/b6d1aea0bef99b8dfec3c8746032474867ba677aPatch
- https://github.com/backstage/backstage/releases/tag/v1.50.5Patch, Release Notes
- https://github.com/backstage/backstage/releases/tag/v1.54.6Patch, Release Notes
- https://github.com/backstage/backstage/security/advisories/GHSA-g2hj-v2j6-vfvgMitigation, Vendor Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.