---
title: "CVE-2026-106557: Backstage @backstage/plugin-techdocs-node - Broken Access Control"
description: "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."
url: https://panop.io/threat-heartbeat/CVE-2026-106557/
---

# 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 ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-106557)

## 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](https://cwe.mitre.org/data/definitions/22.html)

## 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

- [https://nvd.nist.gov/vuln/detail/CVE-2026-106557](https://nvd.nist.gov/vuln/detail/CVE-2026-106557)
- [https://github.com/backstage/backstage/releases/tag/v1.50.5](https://github.com/backstage/backstage/releases/tag/v1.50.5)
- [https://github.com/backstage/backstage/releases/tag/v1.54.6](https://github.com/backstage/backstage/releases/tag/v1.54.6)
- [https://github.com/backstage/backstage/security/advisories/GHSA-f7v3-xhm6-w245](https://github.com/backstage/backstage/security/advisories/GHSA-f7v3-xhm6-w245)
- [https://github.com/backstage/backstage/commit/017ace52d9b327ededc6704cf17799c875ae0f29](https://github.com/backstage/backstage/commit/017ace52d9b327ededc6704cf17799c875ae0f29)
- [https://github.com/backstage/backstage/commit/2d9de4ca117a529de4b6ed7dfb7aa507ca7b3f91](https://github.com/backstage/backstage/commit/2d9de4ca117a529de4b6ed7dfb7aa507ca7b3f91)

[← All CVEs](https://panop.io/threat-heartbeat/)

## What this record can't tell you

- Whether you run the affected software, and where
- Whether an attacker can actually reach and exploit it
- The misconfigurations that never get a CVE number
- What it would cost the business, ranked into what to fix first

Panop answers these inside your environment, for this CVE and every other finding.

[Book a demo](https://panop.io/demo)