{"id":"GHSA-g26x-m427-f48f","summary":"Hatchet: Cross-Tenant Durable Task Event Log Disclosure via Missing Authorization Check","details":"### Summary\n\nThe `GET /api/v1/stable/durable-tasks/{durable-task}` endpoint (`listDurableEventLog`) is missing tenant authorization validation, allowing any authenticated user to read durable task event logs from any tenant.\n\n\n### Impact\nThis CVE requires the attacker to successfully guess the target UUID.\nAny authenticated Hatchet user can read durable task event logs from any other tenant, exposing:\n- Task display names and workflow identifiers\n- User messages (may contain sensitive business data)\n- Wait conditions and branching logic\n- Timing information","aliases":["CVE-2026-63342","GO-2026-6567"],"modified":"2026-10-01T20:56:00.191196746Z","published":"2026-09-22T20:34:14Z","database_specific":{"severity":"MODERATE","github_reviewed":true,"github_reviewed_at":"2026-09-22T20:34:14Z","nvd_published_at":"2026-09-21T16:17:10Z","cwe_ids":["CWE-863"]},"references":[{"type":"WEB","url":"https://github.com/hatchet-dev/hatchet/security/advisories/GHSA-g26x-m427-f48f"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-63342"},{"type":"WEB","url":"https://github.com/hatchet-dev/hatchet/commit/06c1fe43543e853ea98ecc2e6a575e2b8310bbeb"},{"type":"PACKAGE","url":"https://github.com/hatchet-dev/hatchet"}],"affected":[{"package":{"name":"github.com/hatchet-dev/hatchet","ecosystem":"Go","purl":"pkg:golang/github.com/hatchet-dev/hatchet"},"ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"0.91.1"}]}],"database_specific":{"source":"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/09/GHSA-g26x-m427-f48f/GHSA-g26x-m427-f48f.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:N/A:N"}]}