CVE-2026-106455
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.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (0.33%). 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. 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.
- CVSS 3.1
- 7.7 HIGHCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N
- EPSS
- 0.33% probability · 26th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Weakness
- CWE-918
- Affected
- linuxfoundation/backstage plugin-techdocs-node · linuxfoundation/backstage
- Source
- security-advisories@github.com
EPSS moved from 0.3% on 7 October 2026 to 0.3% on 26 October 2026.
References
- https://github.com/backstage/backstage/commit/28aa82ae2815988721dd7bbf43cd69c431dcd71bPatch
- https://github.com/backstage/backstage/commit/9f76ea445088961f68c364764cc4b7734f368fc0Patch
- https://github.com/backstage/backstage/releases/tag/v1.50.6Patch, Release Notes
- https://github.com/backstage/backstage/releases/tag/v1.54.8Patch, Release Notes
- https://github.com/backstage/backstage/releases/tag/v1.55.0Release Notes, Vendor Advisory
- https://github.com/backstage/backstage/security/advisories/GHSA-q38j-6vcm-2f5mMitigation, Vendor Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.