Detections
Analytics

SCA: security update for @backstage/plugin-techdocs-node (GHSA-6jr7-99pf-8vgf)

high Tenable Self-Hosted Container Security Plugin ID 437454

Description

There are packages installed that are affected by a vulnerability referenced in the following CVE:

 - Backstage is an open framework for building developer portals, and @backstage/plugin-techdocs-node
 provides common node.js functionalities for TechDocs. In versions of @backstage/plugin-techdocs-node prior
 to 1.13.11 and 1.14.1, when TechDocs is configured with `runIn: local`, a malicious actor who can submit
 or modify a repository's `mkdocs.yml` file can execute arbitrary Python code on the TechDocs build server
 via MkDocs hooks configuration. @backstage/plugin-techdocs-node versions 1.13.11 and 1.14.1 contain a fix.
 The fix introduces an allowlist of supported MkDocs configuration keys. Unsupported configuration keys
 (including `hooks`) are now removed from `mkdocs.yml` before running the generator, with a warning logged
 to indicate which keys were removed. Users of `@techdocs/cli` should also upgrade to the latest version,
 which includes the fixed `@backstage/plugin-techdocs-node` dependency. Some workarounds are available.
 Configure TechDocs with `runIn: docker` instead of `runIn: local` to provide container isolation, though
 it does not fully mitigate the risk. Limit who can modify `mkdocs.yml` files in repositories that TechDocs
 processes; only allow trusted contributors. Implement PR review requirements for changes to `mkdocs.yml`
 files to detect malicious `hooks` configurations before they are merged. Use MkDocs < 1.4.0 (e.g., 1.3.1)
 which does not support hooks. Note: This may limit access to newer MkDocs features. Building documentation
 in CI/CD pipelines using `@techdocs/cli` does not mitigate this vulnerability, as the CLI uses the same
 vulnerable `@backstage/plugin-techdocs-node` package. (CVE-2026-25153)

See Also

https://github.com/advisories/GHSA-6jr7-99pf-8vgf

Plugin Details

Severity: High

ID: 437454

Version: Revision 1.6

Type: Local

Family: SCA Checks

Published: 2/3/2026

Updated: 7/2/2026

Supported Sensors: Tenable Cloud Security, Tenable Self-Hosted Container Security

Risk Information

VPR

Risk Factor: Medium

Score: 4.9

Percentile: 58.03

Vendor

Vendor Severity: High

CVSS v2

Risk Factor: High

Base Score: 9

Temporal Score: 6.7

Vector: CVSS2#AV:N/AC:L/Au:S/C:C/I:C/A:C

CVSS Score Source: CVE-2026-25153

CVSS v3

Risk Factor: High

Base Score: 8.8

Temporal Score: 7.7

Vector: CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

Vulnerability Information

Exploit Ease: No known exploits are available

Patch Publication Date: 2/2/2026

Vulnerability Publication Date: 1/30/2026

Reference Information

CVE: CVE-2026-25153

cwe: CWE-94