CVE-2026-106557 Backstage @backstage/plugin-techdocs-node - Broken Access Control

Backstage @backstage/plugin-techdocs-node < 1.14.6 and < 1.15.4 contains an information disclosure caused by insufficient validation of TechDocs Markdown extension configuration, letting authenticated users access resources outside intended documentation boundaries, exploit requires authenticated user with documentation source modification privileges.

CVSS base score 7.7 /10
High
CISA KEV
Not listed
Public exploit
None known
Authentication
Required
EPSS
0.30% chance of exploitation in 30 days
View the NVD record ↗

Details

Type
Broken Access Control
Impact
Information Disclosure
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N
Published
7 October 2026
Updated
15 October 2026
Weakness
CWE-22

Vendor fix

Update to versions 1.14.6 or 1.15.4 with pymdown-extensions 10.21.3 or later, normally via mkdocs-techdocs-core 1.7.0 or later.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

References

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