CVE-2026-12888

HTML injection in the Canarytoken Google Chat notification

Published Jun 22, 2026 CVSS 4.0 · 2 Low EPSS < 1% KEV · Not listed
Description
An HTML injection vulnerability exists in the Google Chat webhook notification  sent by Thinkst Applied Research Canarytokens, enabling Interface Manipulation in Google Chat. An attacker can insert limited HTML content including links.


This issue affects Canarytokens: from Docker tag sha-4aef1db90 before sha-8ab4dccd, from Git commit 4aef1db90 before 8ab4dccd.

Remediation

Vendor Solution

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

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values Added
First Time appeared Thinkst Applied Research
Thinkst Applied Research canarytokens
Vendors & Products Thinkst Applied Research
Thinkst Applied Research canarytokens
Type Values Removed Values Added
Description An HTML injection vulnerability exists in the Google Chat webhook notification  sent by Thinkst Applied Research Canarytokens, enabling Interface Manipulation in Google Chat. An attacker can insert limited HTML content including links. This issue affects Canarytokens: from Docker tag sha-4aef1db90 before sha-8ab4dccd, from Git commit 4aef1db90 before 8ab4dccd.
Title HTML injection in the Canarytoken Google Chat notification
Weaknesses CWE-74
References
Metrics cvssV4_0

{'score': 2, 'vector': '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/AU:N/RE:L/U:Green'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
ThinkstAppliedResearch
Published
Updated
Jun 22, 2026, 3:42 PM
Reserved
Jun 22, 2026, 10:56 AM
Status
Awaiting Analysis
Published
Jun 22, 2026, 2:16 PM
Modified
Oct 25, 2026, 11:10 PM