Vulnerability Description
Hatchet is a platform for orchestrating background tasks, AI agents, and durable workflows at scale. Prior to 0.91.1, ValidateOAuthState clears the oauth_state_ session value to an empty string after a successful OAuth callback and later accepts an empty state parameter as equal, allowing an unauthenticated attacker to bind a victim's Hatchet session to an attacker-controlled OAuth identity. Exploitation requires the victim to have completed an OAuth flow in the current session and the deployment to enable auth.google.enabled, auth.github.enabled, or the Slack integration. This issue is fixed in version 0.91.1.
CVSS Score
HIGH
Related Weaknesses (CWE)
References
- https://github.com/hatchet-dev/hatchet/commit/f90464189ad642251e09412d0f99fde353
- https://github.com/hatchet-dev/hatchet/security/advisories/GHSA-phg3-3g28-wq9v
FAQ
What is CVE-2026-61687?
CVE-2026-61687 is a vulnerability with a CVSS score of 7.1 (HIGH). Hatchet is a platform for orchestrating background tasks, AI agents, and durable workflows at scale. Prior to 0.91.1, ValidateOAuthState clears the oauth_state_ session value to an empty string after ...
How severe is CVE-2026-61687?
CVE-2026-61687 has been rated HIGH with a CVSS base score of 7.1/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-61687?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.