CVE-2026-19592

Summary

OpenAI Codex CLI for Windows, macOS, and Linux and Codex Desktop for Windows and macOS automatically collected Git repository metadata without disabling the repository-local core.fsmonitor setting. If a user opens or uses an attacker-prepared repository whose preserved .git/config sets core.fsmonitor to an attacker-controlled filesystem-monitor helper, Git can execute that helper while Codex collects repository metadata. The helper runs outside Codex's command sandbox and without a user-approval prompt, allowing attacker-controlled code to run with the user's privileges. The code can read, change, or delete the user's files and access other resources available to the user's account. An ordinary Git clone does not preserve the source repository's local .git/config; exploitation requires a repository delivered or copied with that configuration intact.

Affected Software

VendorProductVersion RangeStatus
OpenAICodex CLI0.102.0 <= 0.130.0affected
OpenAICodex CLI0.131.0unaffected
OpenAICodex Desktop260202.0859 <= 26.513.31313affected
OpenAICodex Desktop26.519.22136unaffected
OpenAICodex Desktop26.304.38 <= 26.513.40821affected
OpenAICodex Desktop26.519.21041unaffected
OpenAICodex Desktop (Microsoft Store package)26.304.38.0 <= 26.513.4821.0affected
OpenAICodex Desktop (Microsoft Store package)26.519.2081.0unaffected

Weaknesses

  • CWE-15: CWE-15: External Control of System or Configuration Setting

Workarounds

Until updated, do not open or use repository archives or copied directories that preserve attacker-controlled .git/config.

ADP Enrichment

CISA ADP Vulnrichment

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

References