CVE-2026-61681 (GCVE-0-2026-61681)

Vulnerability from cvelistv5 – Published: 2026-09-21 15:42 – Updated: 2026-09-21 15:42
VLAI
Title
Hatchet: SSRF via Unsigned UnsubscribeURL in SNS UnsubscribeConfirmation Handler
Summary
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.
Severity
4.1 (Medium)
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:L/I:N/A:N
CWE
  • CWE-918 - Server-Side Request Forgery (SSRF)
Assigner
References
Impacted products
Vendor Product Version CPE status
hatchet-dev hatchet Affected: < 0.91.1
guessed Create a notification for this product.
Show details on NVD website
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            }
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        }
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            "confidentialityImpact": "LOW",
            "integrityImpact": "NONE",
            "privilegesRequired": "HIGH",
            "scope": "CHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:L/I:N/A:N",
            "version": "3.1"
          }
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      ],
      "problemTypes": [
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              "description": "CWE-918: Server-Side Request Forgery (SSRF)",
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              "type": "CWE"
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      "providerMetadata": {
        "dateUpdated": "2026-09-21T15:42:21.803Z",
        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "shortName": "GitHub_M"
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          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://github.com/hatchet-dev/hatchet/security/advisories/GHSA-fjwv-jf2v-j499"
        },
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        }
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      "source": {
        "advisory": "GHSA-fjwv-jf2v-j499",
        "discovery": "UNKNOWN"
      },
      "title": "Hatchet: SSRF via Unsigned UnsubscribeURL in SNS UnsubscribeConfirmation Handler"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
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    "cveId": "CVE-2026-61681",
    "datePublished": "2026-09-21T15:42:21.803Z",
    "dateReserved": "2026-07-10T18:36:58.848Z",
    "dateUpdated": "2026-09-21T15:42:21.803Z",
    "state": "PUBLISHED"
  },
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  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
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                "vendor": "hatchet-dev",
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          }
        ],
        "id": "CVE-2026-61681",
        "lastModified": "2026-09-21T16:17:09.823",
        "metrics": {
          "cvssMetricV31": [
            {
              "cvssData": {
                "attackComplexity": "LOW",
                "attackVector": "NETWORK",
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        "vulnStatus": "Received",
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                "value": "CWE-918"
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            "type": "Primary"
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        ]
      }
    }
  }
}



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