CVE-2026-61681Network attack vectorHinoki check available

Authenticated SSRF via unsigned SNS unsubscribe URL

Published Sep 21, 2026 · Updated Sep 21, 2026

SSRF in Hatchet before 0.91.2 allows remote authenticated users to access internal HTTP resources through a crafted SNS message. The SNS UnsubscribeConfirmation handler calls http.Get on payload.UnsubscribeURL after signature verification even though BuildSignature excludes that field and applies no destination restriction. Tenant access and a valid AWS-signed message are required; replacing the unsigned URL can expose instance metadata credentials or data and functions on internal services.

CVSS severity4.1
Medium
EPSS probability0.31%
Next 30 days · Oct 19, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Get started

Summary

What happened

SSRF in Hatchet before 0.91.2 allows remote authenticated users to access internal HTTP resources through a crafted SNS message. The SNS UnsubscribeConfirmation handler calls http.Get on payload.UnsubscribeURL after signature verification even though BuildSignature excludes that field and applies no destination restriction. Tenant access and a valid AWS-signed message are required; replacing the unsigned URL can expose instance metadata credentials or data and functions on internal services.

The record

CVE
CVE-2026-61681
Published
Sep 21, 2026
Updated
Sep 21, 2026
Vendor
Hatchet
Product
Hatchet
Classifications
CWE-918, T1555.005, T1190
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Sep 21, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 21, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=< 0.91.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Hatchet · Hatchetversion=< 0.91.1

Published CVSS scores

4.1GitHubCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:L/I:N/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Activity data is delayed. The latest report is Sep 28, 2026.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 22, 2026Sep 28, 2026
Latest reporting daySep 28, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-918Server-Side Request Forgery (SSRF)
T1555.005Credentials from Password Stores: Cloud Instance Metadata API
T1190Exploit Public-Facing Application

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

See the directory against your own environment.

Your stack

Check the software in your environment

Get started to see how Hinoki identifies affected software and validates exploitability in your environment.

Get started