Detections
Analytics

SCA: security update for @backstage/plugin-techdocs-node (GHSA-qmw3-745m-w99g)

high Tenable Self-Hosted Container Security Plugin ID 473653

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. 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. (CVE-2026-106558)

Solution

Update the @backstage/plugin-techdocs-node library and its related packages to version 1.15.4 or later.

See Also

https://github.com/advisories/GHSA-qmw3-745m-w99g

Plugin Details

Severity: High

ID: 473653

Version: Revision 1.1

Type: Local

Family: SCA Checks

Published: 10/7/2026

Updated: 10/7/2026

Risk Information

VPR

Risk Factor: Medium

Score: 4.9

Percentile: 58.36

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-2026-106558

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: 10/7/2026

Vulnerability Publication Date: 10/7/2026

Reference Information

CVE: CVE-2026-106558

cwe: CWE-502