{"cve":"CVE-2026-61681","nvd":{"published":"2026-09-21T16:17:09.823","modified":"2026-09-24T23:17:13.400","status":"Deferred","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.","cvss_v4":null,"cvss_v3":{"version":"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},"cwes":["CWE-918"],"references":["https://github.com/hatchet-dev/hatchet/commit/2d211bce16e5022afaf95780de82dc30e0bcba98","https://github.com/hatchet-dev/hatchet/security/advisories/GHSA-fjwv-jf2v-j499"],"products":[],"source":"nvd","synced_at":"2026-10-19T22:55:23.253742848+00:00"},"epss":{"cve":"CVE-2026-61681","score":0.00311,"percentile":0.23985,"date":"2026-10-31"},"kev":null,"osv":[{"id":"GHSA-fjwv-jf2v-j499","url":"https://osv.dev/vulnerability/GHSA-fjwv-jf2v-j499","summary":"Hatchet: SSRF via Unsigned UnsubscribeURL in SNS UnsubscribeConfirmation Handler","modified":"2026-10-01T20:55:40.411037317Z","packages":[{"ecosystem":"Go","name":"hatchet-dev/hatchet","purl":"pkg:golang/hatchet-dev/hatchet","ranges":["<0.91.1"],"fixed":["0.91.1"]}]},{"id":"GO-2026-6565","url":"https://osv.dev/vulnerability/GO-2026-6565","summary":"SSRF via Unsigned UnsubscribeURL in SNS UnsubscribeConfirmation Handler in github.com/hatchet-dev/hatchet","modified":"2026-10-07T17:45:13.266364215Z","packages":[{"ecosystem":"Go","name":"github.com/hatchet-dev/hatchet","purl":"pkg:golang/github.com/hatchet-dev/hatchet","ranges":["<0.91.2"],"fixed":["0.91.2"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}