HTML injection in the Canarytoken links email

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Summary

CVECVE-2026-11859
StatePUBLISHED
AssignerThinkstAppliedResearch
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-06-10 12:16:25 UTC
Updated2026-06-10 12:16:25 UTC
DescriptionAn HTML injection vulnerability in the "fetch links" email sent by 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-c0f3cf142 before sha-08c3f93d, from Git commit c0f3cf142 before 08c3f93d.

Risk And Classification

Primary CVSS: v4.0 2 LOW from 0f2be0ad-3469-4e56-b38f-4eb96719b425

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:N/SC:N/SI:L/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:N/R:X/V:X/RE:L/U:Green

Problem Types: CWE-74 | CWE-74 CWE-74: Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection')

VersionSourceTypeScoreSeverityVector
4.00f2be0ad-3469-4e56-b38f-4eb96719b425Secondary2LOWCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:N/SC:N/SI:L/SA:N/E:P/C...
4.0CNACVSS2LOWCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:N/SC:N/SI:L/SA:N/E:P/A...

CVSS v4.0 Breakdown

Attack Vector
Network
Attack Complexity
Low
Attack Requirements
None
Privileges Required
None
User Interaction
Active
Confidentiality
None
Integrity
None
Availability
None
Sub Conf.
None
Sub Integrity
Low
Sub Availability
None

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:N/SC:N/SI:L/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:N/R:X/V:X/RE:L/U:Green

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Thinkst Applied Research Canarytokens affected sha-c0f3cf142 sha-08c3f93d custom Not specified
CNA Thinkst Applied Research Canarytokens affected c0f3cf142 08c3f93d git Not specified

References

ReferenceSourceLinkTags
github.com/thinkst/canarytokens/security/advisories/GHSA-55jf-cqr9-r7p4 0f2be0ad-3469-4e56-b38f-4eb96719b425 github.com
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Vendor Comments And Credit

Discovery Credit

CNA: Arkadiusz Marta (en)

Additional Advisory Data

Solutions

CNA: Pull the latest Docker image: $ docker pull thinkst/canarytokens:latest

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