{"id":"EUVD-2026-83978","revision":"53d7db09f1e24f04b202d0dd5742fe83","records":[{"revision":"53d7db09f1e24f04b202d0dd5742fe83","observedAt":"2026-11-03T12:02:37.1+00:00","statement":{"source":"euvd","id":"EUVD-2026-83978","aliases":["CVE-2026-61687","GHSA-phg3-3g28-wq9v"],"title":"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 ac…","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.","state":0,"publishedAt":null,"modifiedAt":null,"affected":[],"metrics":[{"system":"EUVD CVSS 3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:H/A:N","score":7.1,"severity":null}],"references":["https://github.com/hatchet-dev/hatchet/security/advisories/GHSA-phg3-3g28-wq9v","https://github.com/hatchet-dev/hatchet/commit/f90464189ad642251e09412d0f99fde353036428"],"sourceUrl":"https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-83978","license":"ENISA EUVD · source terms and attribution apply","enrichment":{"sourceStatus":null,"weaknesses":[],"productCriteria":[],"sourceDates":{"datePublished":"Sep 21, 2026, 3:45:27 PM","dateUpdated":"Sep 21, 2026, 8:45:49 PM"},"relatedAdvisories":[],"note":"EUVD source date text has no stated timezone and is retained without inventing a UTC instant. Related bulletin membership is not an alias, common cause or applicability claim. A missing vector with a zero score is treated as unrated. Complete vendor/product and underlying source evidence remains in the original JSON."},"key":"euvd:EUVD-2026-83978","identifiers":["EUVD-2026-83978","CVE-2026-61687","GHSA-phg3-3g28-wq9v"]},"retained":false,"historicalAffected":[]}],"coverage":[]}