{"id":"GHSA-fjwv-jf2v-j499","summary":"Hatchet: SSRF via Unsigned UnsubscribeURL in SNS UnsubscribeConfirmation Handler","details":"### Summary\n  The SNS `UnsubscribeConfirmation` handler in `internal/integrations/ingestors/sns/sns.go` makes an unvalidated\n  `http.Get()` call to `payload.UnsubscribeURL` without any URL restriction. Because `UnsubscribeURL` is intentionally\n  excluded from the `BuildSignature()` signed field list, an attacker can replace this field in a legitimately\n  AWS-signed message with an arbitrary internal URL, bypassing the `VerifyPayload()` signature check entirely and\n  triggering a Server-Side Request Forgery (SSRF) against internal infrastructure — including the EC2 Instance Metadata\n  Service (IMDS) at `169.254.169.254`.\n\n ### Impact\n\n  This is a Server-Side Request Forgery (SSRF) vulnerability. An attacker with a Hatchet account and an AWS Free Tier\n  account can:\n\n  - Reach the EC2 IMDS endpoint and retrieve IAM temporary credentials if Hatchet is deployed on AWS\n  - Port-scan and probe internal services not exposed to the internet\n  - Access internal HTTP APIs (e.g., Kubernetes API server, internal dashboards) from the Hatchet server's network\n  context","aliases":["CVE-2026-61681","GO-2026-6565"],"modified":"2026-10-01T20:55:40.411037317Z","published":"2026-09-22T20:34:12Z","database_specific":{"severity":"MODERATE","github_reviewed":true,"github_reviewed_at":"2026-09-22T20:34:12Z","nvd_published_at":"2026-09-21T16:17:09Z","cwe_ids":["CWE-918"]},"references":[{"type":"WEB","url":"https://github.com/hatchet-dev/hatchet/security/advisories/GHSA-fjwv-jf2v-j499"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-61681"},{"type":"WEB","url":"https://github.com/hatchet-dev/hatchet/commit/2d211bce16e5022afaf95780de82dc30e0bcba98"},{"type":"PACKAGE","url":"https://github.com/hatchet-dev/hatchet"}],"affected":[{"package":{"name":"hatchet-dev/hatchet","ecosystem":"Go","purl":"pkg:golang/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-fjwv-jf2v-j499/GHSA-fjwv-jf2v-j499.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:L/I:N/A:N"}]}