How serious is CVE-2026-29186?

This vulnerability has a CVSS score of 9.8 out of 10, classified as CRITICAL severity. No public exploit code has been identified yet.

Which products are affected by CVE-2026-29186?

CVE-2026-29186 affects linuxfoundation backstage plugin-techdocs-node. Check the full CVE details for specific version information.

How do I fix CVE-2026-29186?

To remediate CVE-2026-29186, check for security patches from linuxfoundation. Apply all available updates and security patches. If no patch is available, implement recommended workarounds or security controls to mitigate the risk.

CVE-2026-29186

Critical

|9.8

No Exploit

Plain English Summary

AI-powered analysis for quick understanding

This vulnerability allows an attacker to run any Python code on a server using the Backstage platform, potentially taking full control of the system. It occurs when the attacker can create a specially crafted configuration file for documentation that bypasses security checks, and it has been fixed in the latest version.

Technical Description

Backstage is an open framework for building developer portals. Prior to version 1.14.3, this is a configuration bypass vulnerability that enables arbitrary code execution. The @backstage/plugin-techdocs-node package uses an allowlist to filter dangerous MkDocs configuration keys during the documentation build process. A gap in this allowlist allows attackers to craft an mkdocs.yml that causes arbitrary Python code execution, completely bypassing TechDocs' security controls. This issue has been patched in version 1.14.3.

CVSS Vector Analysis

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredNone

User InteractionNone

Confidentiality ImpactHigh

Integrity ImpactHigh

Availability ImpactHigh

ScopeUnchanged

Vector String

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Exploit Resources

Search for proof-of-concept code and exploit modules

GitHub Search Exploit-DB Nuclei Templates Metasploit Vulners

Official References

NIST NVD

Est. Bounty

$13,000($5K-$15K)

Vendor Response

Grade APatched in 4 days

Quick Information

Published

Mar 7, 2026

about 1 month ago

Last Modified

Mar 11, 2026

27 days ago

Vendor

linuxfoundation

Product

backstage plugin-techdocs-node

Related Vulnerabilities

CVE-2025-61611High

This vulnerability allows an attacker to remotely crash the modem, causing a denial of service without needing any special permissions. It occurs due to improper checks on the input data sent to the modem.

CVE-2026-20435Medium

This vulnerability allows an attacker with physical access to a device to read unique identifiers that could reveal sensitive information about the device. No special permissions or user actions are needed to exploit this flaw, making it a significant risk for devices that may be left unattended.