GHSA-fjwv-jf2v-j499

Source

https://github.com/advisories/GHSA-fjwv-jf2v-j499

Import Source

https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/09/GHSA-fjwv-jf2v-j499/GHSA-fjwv-jf2v-j499.json

JSON Data

https://api.osv.dev/v1/vulns/GHSA-fjwv-jf2v-j499

Aliases

CVE-2026-61681

Published

2026-09-22T20:34:12Z

Modified

2026-09-22T21:00:06Z

Severity

4.1 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:L/I:N/A:N CVSS Calculator

Summary

Hatchet: SSRF via Unsigned UnsubscribeURL in SNS UnsubscribeConfirmation Handler

Details

Summary

The SNS UnsubscribeConfirmation handler in internal/integrations/ingestors/sns/sns.go makes an unvalidated http.Get() call to payload.UnsubscribeURL without any URL restriction. Because UnsubscribeURL is intentionally excluded from the BuildSignature() signed field list, an attacker can replace this field in a legitimately AWS-signed message with an arbitrary internal URL, bypassing the VerifyPayload() signature check entirely and triggering a Server-Side Request Forgery (SSRF) against internal infrastructure — including the EC2 Instance Metadata Service (IMDS) at 169.254.169.254.

Impact

This is a Server-Side Request Forgery (SSRF) vulnerability. An attacker with a Hatchet account and an AWS Free Tier account can:

Reach the EC2 IMDS endpoint and retrieve IAM temporary credentials if Hatchet is deployed on AWS
Port-scan and probe internal services not exposed to the internet
Access internal HTTP APIs (e.g., Kubernetes API server, internal dashboards) from the Hatchet server's network context

Database specific

{
    "cwe_ids":  [
        "CWE-918"
    ],
    "github_reviewed":  true,
    "github_reviewed_at":  "2026-09-22T20:34:12Z",
    "nvd_published_at":  "2026-09-21T16:17:09Z",
    "severity":  "MODERATE"
}

References

Affected packages

Go / hatchet-dev/hatchet

Package

Name: hatchet-dev/hatchet; View open source insights on deps.dev
Purl: pkg:golang/hatchet-dev/hatchet

Affected ranges

Type: SEMVER
Events: Introduced

0 Unknown introduced version / All previous versions are affected

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"