---
id: CVE-2026-85220
title: >-
  A vulnerability in the Thinkst Canary honeypot Redis service allows an
  unauthenticated remote attacker to execute a Denial-of-Service attack against
  the honeypot.


  The vulnerability is accessible when the Redis service is enabled only.


  …
summary: >-
  A vulnerability in the Thinkst Canary honeypot Redis service allows an
  unauthenticated remote attacker to execute a Denial-of-Service attack against
  the honeypot.


  The vulnerability is accessible when the Redis service is enabled only.


  …
severity: low
cvss: 3.7
cvssVector: 'CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L'
cwe:
  - CWE-770
vendor: Thinkst Applied Research
product: Canary
affected:
  - Canary
published: '2026-09-21'
updated: '2026-09-21'
sourceUpdated: '2026-09-21T15:17:32.853'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-85220'
references:
  - url: 'https://canary.tools/security-advisories/tc-2026-01.txt'
    label: 0f2be0ad-3469-4e56-b38f-4eb96719b425
tags:
  - nvd
  - cve.org
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-09-21T14:36:45.444422Z'
ingestedAt: '2026-09-21T13:37:22.842Z'
---

## Overview

A vulnerability in the Thinkst Canary honeypot Redis service allows an unauthenticated remote attacker to execute a Denial-of-Service attack against the honeypot.

The vulnerability is accessible when the Redis service is enabled only.

The Canary is NOT affected if the Redis service is disabled.

Thinkst has addressed this issue on all supported platforms.

New update files to address this issue are available on all platforms except Docker. For Docker customers, a new Docker image has been published which includes the patch. Customers with automatic updates enabled already have updates in distribution. If automatic updates are disabled, customers are advised to update their Canaries.

Workarounds are available for customers unable to update at this time.

## Remediation

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