TechDocs Mkdocs Configuration Key Enables Arbitrary Code Execution

Not analysed yet

We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.

Severity and exploitation

• CISA KEV Not listed.
• EPSS 0.0087, the 58th percentile, on 5 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

This record came from the full history of the GitHub Advisory Database, published 5 Mar 2026. New records show when each source confirmed them.

Sources

• GitHub Advisory Database: GHSA-928r-fm4v-mvrw
• OSV: GHSA-928r-fm4v-mvrw
• github.com/backstage/backstage/security/advisories/GHSA-928r-fm4v-mvrw
• nvd.nist.gov/vuln/detail/CVE-2026-29186
• backstage.io/docs/features/techdocs/architecture
• github.com/backstage/backstage
• www.mkdocs.org/about/release-notes/#version-14-2022-09-27
• www.mkdocs.org/user-guide/configuration/#hooks

Facts on this page come from the GitHub Advisory Database (CC-BY 4.0), OSV and the other sources listed, as published. We don’t reproduce full advisory descriptions, which can contain exploit code.