Thinkst Applied Research Canarytokens prior sha-bfda4df Notification Email injection

Summaryinfo

A vulnerability categorized as critical has been discovered in Thinkst Applied Research Canarytokens. This impacts an unknown function of the component Notification Email Handler. The manipulation results in injection. This vulnerability is cataloged as CVE-2026-10729. The attack may be launched remotely. There is no exploit available. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability was found in Thinkst Applied Research Canarytokens. It has been classified as critical. Affected is an unknown functionality of the component Notification Email Handler. The manipulation with an unknown input leads to a injection vulnerability. CWE is classifying the issue as CWE-74. The product constructs all or part of a command, data structure, or record using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify how it is parsed or interpreted when it is sent to a downstream component. This is going to have an impact on confidentiality, integrity, and availability. CVE summarizes:

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.

The weakness was shared by Gaurav Popalghat as GHSA-hmjv-pj8j-8fg7. The advisory is shared for download at github.com. This vulnerability is traded as CVE-2026-10729 since 06/03/2026. The exploitability is told to be difficult. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. Successful exploitation requires user interaction by the victim. There are neither technical details nor an exploit publicly available. The MITRE ATT&CK project declares the attack technique as T1055.

Upgrading to version sha-bfda4df eliminates this vulnerability. Applying the patch bfda4df is able to eliminate this problem. The best possible mitigation is suggested to be upgrading to the latest version.

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• Thinkst Applied Research

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• Canarytokens

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