Is CVE-2026-11859 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2026-11859 being exploited in the wild.

How severe is CVE-2026-11859?

Informational severity, with a CVSS score of 5.1, published 10 June 2026.

Which products and versions are affected?

Thinkst Applied Research Canarytokens Docker tag sha-c0f3cf142 before sha-08c3f93d; Git commit c0f3cf142 before 08c3f93d.

Is there a fix for CVE-2026-11859?

A patch was published on 2026-06-10. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

How is CVE-2026-11859 attacked?

It is attacked over the network, in a network appliance.

Am I affected by CVE-2026-11859?

Check whether you run Thinkst Applied Research Canarytokens at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

CVE-2026-11859: Thinkst Canarytokens HTML injection in fetch links email

CVE-2026-11859 · Severity: info · CVSS 5.1 · Published 2026-06-10

Thinkst Canarytokens, a tool used to create "digital tripwires" for detecting unauthorized access, is vulnerable to an HTML injection flaw. An attacker can manipulate the "memo" field in a token to include malicious code or links in the automated "fetch links" emails sent to users. This could be used to perform phishing attacks, display misleading information, or potentially execute malicious scripts depending on the recipient's email client.

Technologies: Thinkst Applied Research Canarytokens. Vendors: Thinkst Applied Research.

Quick answers

Is CVE-2026-11859 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2026-11859 being exploited in the wild.
How severe is CVE-2026-11859?: Informational severity, with a CVSS score of 5.1, published 10 June 2026.
Which products and versions are affected?: Thinkst Applied Research Canarytokens Docker tag sha-c0f3cf142 before sha-08c3f93d; Git commit c0f3cf142 before 08c3f93d.
Is there a fix for CVE-2026-11859?: A patch was published on 2026-06-10. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
How is CVE-2026-11859 attacked?: It is attacked over the network, in a network appliance.
Am I affected by CVE-2026-11859?: Check whether you run Thinkst Applied Research Canarytokens at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

Technical details

An HTML injection vulnerability exists in Thinkst Applied Research Canarytokens due to improper neutralization of the 'memo' field. When the system generates a "fetch links" email, it includes the user-supplied 'memo' content without adequate escaping or sanitization. A remote attacker can exploit this by injecting arbitrary HTML or JavaScript into the memo field. If a recipient opens the resulting email in a client that renders HTML, the injected content will execute or display, potentially leading to Cross-Site Scripting (XSS), phishing, or interface manipulation. The vulnerability is patched in Docker image sha-08c3f93d and subsequent versions.

Affected products

Thinkst Applied Research Canarytokens Docker tag sha-c0f3cf142 before sha-08c3f93d; Git commit c0f3cf142 before 08c3f93d

Timeline

2026-06-10: disclosed
2026-06-10: advisory
2026-06-10: patched

References

https://github.com/thinkst/canarytokens/security/advisories/GHSA-55jf-cqr9-r7p4

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