Backstage: Improper validation of MkDocs plugin configuration in TechDocs

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-106455
StatePUBLISHED
AssignerGitHub_M
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-10-06 21:17:15 UTC
Updated2026-10-06 21:17:15 UTC
DescriptionBackstage 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.

Risk And Classification

Primary CVSS: v3.1 7.7 HIGH from [email protected]

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N

Problem Types: CWE-918 | CWE-918 CWE-918: Server-Side Request Forgery (SSRF)

VersionSourceTypeScoreSeverityVector
3.1[email protected]Secondary7.7HIGHCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N
3.1CNADECLARED7.7HIGHCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Changed
Confidentiality
High
Integrity
None
Availability
None

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Backstage Backstage affected >= 0.71.1, < 1.50.6 Not specified
CNA Backstage Backstage affected >= 1.51.0-next.0, < 1.54.8 Not specified
CNA @backstage Plugin-techdocs-node affected >= 0.11.12, < 1.14.7 Not specified
CNA @backstage Plugin-techdocs-node affected >= 1.15.0, < 1.15.5 Not specified

References

ReferenceSourceLinkTags
github.com/backstage/backstage/security/advisories/GHSA-q38j-6vcm-2f5m [email protected] github.com
github.com/backstage/backstage/releases/tag/v1.55.0 [email protected] github.com
github.com/backstage/backstage/commit/9f76ea445088961f68c364764cc4b7734f... [email protected] github.com
github.com/backstage/backstage/releases/tag/v1.50.6 [email protected] github.com
github.com/backstage/backstage/commit/28aa82ae2815988721dd7bbf43cd69c431... [email protected] github.com
github.com/backstage/backstage/releases/tag/v1.54.8 [email protected] github.com
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

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