---
id: CVE-2026-61681
title: >-
  Hatchet is a platform for orchestrating background tasks, AI agents, and
  durable workflows at scale
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.Unsub…
severity: medium
cvss: 4.1
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:L/I:N/A:N'
cwe:
  - CWE-918
vendor: hatchet-dev
product: hatchet
affected:
  - hatchet < 0.91.1
patched:
  - hatchet-dev/hatchet 0.91.1
published: '2026-09-21'
updated: '2026-09-24'
sourceUpdated: '2026-09-24T23:17:13.400'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-61681'
references:
  - url: >-
      https://github.com/hatchet-dev/hatchet/commit/2d211bce16e5022afaf95780de82dc30e0bcba98
    label: security-advisories@github.com
  - url: >-
      https://github.com/hatchet-dev/hatchet/security/advisories/GHSA-fjwv-jf2v-j499
    label: security-advisories@github.com
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-61681'
  - url: 'https://github.com/advisories/GHSA-fjwv-jf2v-j499'
  - url: 'https://github.com/hatchet-dev/hatchet'
tags:
  - nvd
  - cve.org
  - ghsa
  - go
  - osv
epss: 0.00311
epssPercentile: 0.21471
aliases:
  - GHSA-fjwv-jf2v-j499
ecosystem: go
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-09-24T22:16:56.469427Z'
ingestedAt: '2026-09-21T16:11:47.446Z'
---

## Overview

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.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.

## Package advisory (CVE-2026-61681)

Affected packages:

- `hatchet-dev/hatchet < 0.91.1`

Patched in:

- `hatchet-dev/hatchet 0.91.1`

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