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CVE-2026-29186

7.7 · HIGH

Backstage is an open framework for building developer portals.

Published Mar 7, 2026CWE-74EPSS 0.95%

Overview

CVE-2026-29186 is a high-severity vulnerability. It was published on March 7, 2026 and has a CVSS 3.1 base score of 7.7 (HIGH).

This vulnerability has a CVSS 3.1 base score of 7.7, rated HIGH. It can be exploited remotely over the network. Some level of privileges is required for exploitation.

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.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

GitHubgithub.com/backstage/backstage/security/advisories/GHSA-928r-fm4v-mvrwRefaccess.redhat.com/errata/RHSA-2026:13826Refaccess.redhat.com/errata/RHSA-2026:9742Refaccess.redhat.com/security/cve/CVE-2026-29186Refbugzilla.redhat.com/show_bug.cgi?id=2445480Refsecurity.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-29186.json

How CyberStrike helps

Frequently asked questions

What is CVE-2026-29186?

CVE-2026-29186 is a high-severity vulnerability. It was published on March 7, 2026 and has a CVSS 3.1 base score of 7.7 (HIGH).

How severe is CVE-2026-29186?

This vulnerability has a CVSS 3.1 base score of 7.7, rated HIGH. It can be exploited remotely over the network. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2026-29186?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2026-29186?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-29186 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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