CVE-2026-27938

Summary

WPGraphQL provides a GraphQL API for WordPress sites. Prior to version 2.9.1, the wp-graphql/wp-graphql repository contains a GitHub Actions workflow (release.yml) vulnerable to OS command injection through direct use of ${{ github.event.pull_request.body }} inside a run: shell block. When a pull request from develop to master is merged, the PR body is injected verbatim into a shell command, allowing arbitrary command execution on the Actions runner. Version 2.9.1 contains a fix for the vulnerability.

Affected Software

Weaknesses

• CWE-78: CWE-78: Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')

ADP Enrichment

CISA ADP Vulnrichment

• SSVC:
• Exploitation: poc
  • Automatable: no
  • Technical Impact: total

References

• https://github.com/wp-graphql/wp-graphql/security/advisories/GHSA-4q9f-mjxf-rx7x
• https://github.com/wp-graphql/wp-graphql/commit/de0c2d590593f1099546ad517106e454a498bc58

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