What is GHSA-h4hv-92pp-pcjg?

GHSA-h4hv-92pp-pcjg is a security advisory published by GitHub Security Advisories with High severity. CyberChef has a Cross-site Scripting issue

Which CVE IDs does GHSA-h4hv-92pp-pcjg cover?

GHSA-h4hv-92pp-pcjg covers the following CVE IDs: CVE-2026-42615. Each CVE has its own detail page on EchelonGraph Pulse with the synthesized EG score.

What is the CVSS v3 score of GHSA-h4hv-92pp-pcjg?

GHSA-h4hv-92pp-pcjg has a CVSS v3 base score of 7.2, published by GitHub Security Advisories.

Which products are affected by GHSA-h4hv-92pp-pcjg?

GHSA-h4hv-92pp-pcjg affects 1 product, including: npm/cyberchef:\u003c 11.0.0.

GHSA-h4hv-92pp-pcjgHighCVSS 7.2

CyberChef has a Cross-site Scripting issue

Vendor

GitHub Security Advisories

Published

April 29, 2026

Last Modified

May 6, 2026

🔗 CVE IDs covered (1)

CVE-2026-42615 →

📋 Description

GCHQ CyberChef before 11.0.0 allows XSS via Show Base64 offsets, as demonstrated by the /#recipe=Show_Base64_offsets('%3Cscript substring.

🎯 Affected products1

npm/cyberchef:< 11.0.0

🔗 References (6)

https://nvd.nist.gov/vuln/detail/CVE-2026-42615
https://github.com/gchq/CyberChef/issues/2344
https://github.com/gchq/CyberChef/pull/2346
https://github.com/gchq/CyberChef/commit/9641ae07f92e9af50f10e978385465b2f4a36c4d
https://github.com/gchq/CyberChef/compare/v10.24.0...v11.0.0
https://github.com/advisories/GHSA-h4hv-92pp-pcjg