8.8

CVE-2026-106558

Backstage: Improper validation of TechDocs MkDocs configuration

Backstage is an open framework for building developer portals. Prior to 1.14.8, 1.15.6, and 2.0.1, the @backstage/plugin-techdocs-node package improperly validated mapping-style markdown_extensions configuration. An authenticated attacker who can register or influence an SCM-backed documentation source may bypass TechDocs sanitization and cause Python objects to be imported and instantiated in the generator runtime, leading to arbitrary code execution. Earlier fixes in versions 1.14.6 and 1.15.4 did not fully address the supported mapping representation of markdown_extensions. Impact is greatest when documentation generation runs with backend credentials, filesystem access, or internal network access. This issue is fixed in versions 1.14.8, 1.15.6, and 2.0.1.
Daten sind bereitgestellt durch das CVE Programm von einer CVE Numbering Authority (CNA) (Unstrukturiert).
Herstellerbackstage
≫
Produkt backstage
Version < 1.50.7
Status affected
Version >= 1.51.0-next.0, < 1.54.9
Status affected
Version >= 1.55.0-next.0, < 1.55.2
Status affected
Hersteller@backstage
≫
Produkt plugin-techdocs-node
Version < 1.14.8
Status affected
Version >= 1.15.0, < 1.15.6
Status affected
Version >= 2.0.0, < 2.0.1
Status affected
VulnDex Vulnerability Enrichment
Diese Information steht angemeldeten Benutzern zur Verfügung. Login Login
Zu dieser CVE wurde keine Warnung gefunden.
CVSS Metriken
Quelle Base Score Exploit Score Impact Score Vector String
security-advisories@github.com 8.8 2.8 5.9
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CWE-502 Deserialization of Untrusted Data

The product deserializes untrusted data without sufficiently ensuring that the resulting data will be valid.

https://github.com/backstage/backstage/security/advisories/GHSA-qmw3-745m-w99g
https://github.com/backstage/backstage/commit/32723a0fe4e12ed80535fc65d5331765c55aa91b
https://github.com/backstage/backstage/commit/944edb51c8524d3664b18f2d57ba101b1c93b709
https://github.com/backstage/backstage/commit/f18e9abcc6051491862b15e4fc60e69f8d52310c
https://github.com/backstage/backstage/releases/tag/v1.50.7
https://github.com/backstage/backstage/releases/tag/v1.54.9
https://github.com/backstage/backstage/releases/tag/v1.55.2