Is CVE-2026-42615 actively exploited?

CVE-2026-42615 has no public evidence of in-the-wild exploitation as of 2026-04-29.

What is the CVSS score for CVE-2026-42615?

CVE-2026-42615 has a CVSS score of 7.2 (HIGH severity). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N.

How do I patch CVE-2026-42615?

Vendor patch guidance is linked from the references on this page. CVEDatabase generates AI-assisted remediation guidance on demand for CVE-2026-42615.

Which products are affected by CVE-2026-42615?

Affected products for CVE-2026-42615 are listed on this page once vendor data becomes available.

Fix CVE-2026-42615 - HIGH Vulnerability

Description

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

CVSS Metrics

Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N
Attack Vector: network
Complexity: low
Privileges: none
User Action: none
Scope: changed
Confidentiality: low
Integrity: low
Availability: none
Weaknesses: CWE-79 · Cross-site Scripting (XSS)

Metadata

Primary Vendor: UNKNOWN
Published: 4/29/2026
Last Modified: 4/29/2026
Source: NIST NVD
Note: Verify all details with official vendor sources before applying patches.

CVE-2026-42615

Description

CVSS Metrics

Metadata

Affected Products

Remediation Guidance

Executive Summary