CVE WatchOct 8, 2026

CVE-2026-106557

Backstage is an open framework for building developer portals. Prior to 1.14.6 and 1.15.4, the @backstage/plugin-techdocs-node package did n

CVSS

7.7

High

EPSS

0.3%

p21

KEV

—

Exploit Today

0-100

Published: Oct 7, 2026 · Last modified: Oct 8, 2026 · CWE-22 · CWE-918

EPSS · 30d

0.3%EPSS · 30 days0.3%

2026-10-082026-10-23

Technical description

Backstage is an open framework for building developer portals. Prior to 1.14.6 and 1.15.4, the @backstage/plugin-techdocs-node package did not sufficiently validate TechDocs Markdown extension configuration. An authenticated user who can register or modify documentation sources may cause a TechDocs build to access resources outside the intended documentation boundary, potentially exposing backend-host data or internal network resources. This issue is fixed in versions 1.14.6 and 1.15.4 when pymdown-extensions 10.21.3 or later is also used, normally through mkdocs-techdocs-core 1.7.0 or later.

Official references

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