Answer in brief
CVE-2026-106455 records a High severity (CVSS 7.7) vulnerability in Backstage: Improper validation of MkDocs plugin configuration in TechDocs. The current sources do not mark it as known exploited. The current feed maps backstage/backstage (generic), @backstage/plugin-techdocs-node (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 7.7. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps backstage/backstage (generic), @backstage/plugin-techdocs-node (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| backstage/backstagegeneric | >=0.71.1 <1.50.6 || >=1.51.0-next.0 <1.54.8 | 1.50.6, 1.54.8 |
| @backstage/plugin-techdocs-nodegeneric | >=0.11.12 <1.14.7 || >=1.15.0 <1.15.5 | 1.14.7, 1.15.5 |
Published upstream
Oct 6, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Oct 6, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Oct 6, 2026
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.
Quoted source text, attributed separately from HOL analysis.