CVE-2026-10729: HTML injection in the notification email for "Slow Redirect" and "Cloned Website" Canarytokens

Severity: low (CVSS 1.2 v4.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.2% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-06-03 · updated 2026-07-22
Weakness: CWE-74

Description

An HTML injection vulnerability in the notification email for "Slow Redirect" and "Cloned Website" Canarytokens exists in Thinkst Applied Research Canarytokens, enabling Interface Manipulation, Cross-Site Scripting (XSS) in emails clients that render HTML emails. This issue affects Canarytokens: from Docker tag sha-c42435e before sha-bfda4df, from Git commit c42435e before bfda4df.

Affected products

Thinkst Applied Research Canarytokens: from sha-c42435e before sha-bfda4df — fixed in sha-bfda4df

How to fix

Upgrade to a fixed version: Thinkst Applied Research Canarytokens sha-bfda4df. Check the vendor advisory for mitigations.

References

https://github.com/thinkst/canarytokens/security/advisories/GHSA-hmjv-pj8j-8fg7

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