CVE-2026-106455

What it is

Backstage is an open framework for building developer portals. From 0.11.12 until 1.14.7 and 1.15.5, the @backstage/plugin-techdocs-node package is affected by improper validation of mkdocs plugin configuration in techdocs. An authenticated attacker with control over a TechDocs source repository could cause a documentation build to retrieve and publish data from network locations reachable by the build environment. Exposure depends on deployment topology, build mode, and target endpoint protections. Modern cloud metadata services that require tokens or special headers are not directly accessible through the affected behavior. This issue is fixed in @backstage/plugin-techdocs-node versions 1.14.7 and 1.15.5.

At a glance

Exploitability

Can be exploited over the network with a low-privilege account. High risk of data exposure.

Exploit odds

0.4% chance of exploitation in the next 30 days (EPSS).

Fix

A patch, advisory or fixed version is referenced. Upgrade or apply it.

Timeline

1. 2026-10-06 16:49 UTC ReservedThe CVE id was reserved by its CNA
2. 2026-10-06 21:17 UTC PublishedDisclosed publicly on CVE.org and NVD
3. 2026-10-13 15:27 UTC Last updatedMost recent change to the record

Why it ranks here

• Exploited in the wild: no, CISA does not list it.
• Exploit odds: 0.4% in the next 30 days (EPSS).
• Severity: 7.7 HIGH (CVSS).
• Fix: a patch or advisory is linked.

Details

Published

2026-10-06 21:17 UTC

Last modified

2026-10-13 15:27 UTC

Exploit probability

0.4% · EPSS, next 30 days

Weakness

CWE-918 · Server-side request forgery

Record status

Analyzed

Affected

• Linuxfoundation Backstage plugin-techdocs-node < 1.14.7
• Linuxfoundation Backstage plugin-techdocs-node < 1.15.5
• Linuxfoundation Backstage < 1.50.6
• Linuxfoundation Backstage < 1.54.8
• Linuxfoundation Backstage 1.51.0

Attack profile CVSS 3.1 · 7.7

Attack vector

Network

Complexity

Low

Privileges needed

Low

User interaction

None

Scope

Changed

Confidentiality

High

Integrity

None

Availability

None

Is it in your code?

Hand this to your coding agent. It searches your project for the affected products and checks versions. Nothing leaves your machine.

Read https://cve-list.com/agent/cve/CVE-2026-106455.md and follow it. Check whether this project is affected by CVE-2026-106455. Read only. Don't change anything and don't upload my code. Tell me yes, no or not sure, with the file as proof.

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