{"id":"EUVD-2026-83976","revision":"a6dde98f816844d686639600d7abbd40","records":[{"revision":"a6dde98f816844d686639600d7abbd40","observedAt":"2026-10-28T08:39:00.978+00:00","statement":{"source":"euvd","id":"EUVD-2026-83976","aliases":["CVE-2026-61681","GHSA-fjwv-jf2v-j499"],"title":"Hatchet is a platform for orchestrating background tasks, AI agents, and durable workflows at scale. Prior to 0.91.1, the SNS UnsubscribeConfirmation handler in internal/integrations/ingestors/sns/sns.go calls http.Get() on payload.Unsubscr…","description":"Hatchet is a platform for orchestrating background tasks, AI agents, and durable workflows at scale. Prior to 0.91.1, the SNS UnsubscribeConfirmation handler in internal/integrations/ingestors/sns/sns.go calls http.Get() on payload.UnsubscribeURL after VerifyPayload() even though BuildSignature() excludes UnsubscribeURL, allowing an authenticated Hatchet tenant to replace that field in an otherwise valid AWS-signed message with an internal URL. The server-side request can reach EC2 Instance Metadata Service, internal services, and internal HTTP APIs, potentially exposing IAM credentials or network-accessible data and functionality. 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:H/UI:N/S:C/C:L/I:N/A:N","score":4.1,"severity":null}],"references":["https://github.com/hatchet-dev/hatchet/security/advisories/GHSA-fjwv-jf2v-j499","https://github.com/hatchet-dev/hatchet/commit/2d211bce16e5022afaf95780de82dc30e0bcba98"],"sourceUrl":"https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-83976","license":"ENISA EUVD · source terms and attribution apply","enrichment":{"sourceStatus":null,"weaknesses":[],"productCriteria":[],"sourceDates":{"datePublished":"Sep 21, 2026, 3:42:21 PM","dateUpdated":"Sep 24, 2026, 10:17:06 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-2026-83976","identifiers":["EUVD-2026-83976","CVE-2026-61681","GHSA-fjwv-jf2v-j499"]},"retained":false,"historicalAffected":[]}],"coverage":[]}