OpenAPI3 version value escapes `emitterOutputDir` and overwrites YAML/JSON outside the output tree

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 No score.

Timeline

This record came from the full history of the GitHub Advisory Database, published 8 Sept 2026. New records show when each source confirmed them.

Sources

• GitHub Advisory Database: GHSA-2q42-4q24-7rgv
• OSV: GHSA-2q42-4q24-7rgv
• github.com/microsoft/typespec/security/advisories/GHSA-2q42-4q24-7rgv
• github.com/microsoft/typespec/pull/11777
• github.com/microsoft/typespec/commit/e0f67bdf3c5a0875dfa98b475648af37caac71a6
• github.com/microsoft/typespec

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.