GitHub Advisoryadvisory · npm
GHSA-h4hv-92pp-pcjg CyberChef has a Cross-site Scripting issue
HIGH
Official page ↗
- Aliases
- CVE-2026-42615
- Ecosystem
- npm
- Packages
- cyberchef
- Severity
- High
- CVSS vector
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N
- Weaknesses
- CWE-79
- Reviewed
- 2026-05-06
Affected packages
• npm cyberchef: < 11.0.0 → fixed in 11.0.0
Description
GCHQ CyberChef before 11.0.0 allows XSS via Show Base64 offsets, as demonstrated by the /#recipe=Show_Base64_offsets('%3Cscript substring.
Related
Alias · CVE (1)
- CVE-2026-42615 GCHQ CyberChef before 11.0.0 allows XSS via Show Base64 offsets, as demonstrated by the /#recipe=Show_Base64_offsets('%3Cscript substring. vulnerability
Weakness · CWE (1)
- CWE-79 Improper Neutralization of Input During Web Page Generation weakness
References
- https://nvd.nist.gov/vuln/detail/CVE-2026-42615 advisory
- https://github.com/gchq/CyberChef/issues/2344 web
- https://github.com/gchq/CyberChef/pull/2346 web
- https://github.com/gchq/CyberChef/commit/9641ae07f92e9af50f10e978385465b2f4a36c4d web
- https://github.com/gchq/CyberChef package
- https://github.com/gchq/CyberChef/compare/v10.24.0...v11.0.0 web