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CVE-2026-42615 | Mondoo Vulnerability Intelligence

Vulnerability IntelligenceCVE-2026-42615

CVE-2026-42615

HIGH7.2

GCHQ CyberChef before 11

Published Apr 29, 2026

Modified 2 days ago

Details

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

References

https://github.com/gchq/CyberChef/commit/9641ae07f92e9af50f10e978385465b2f4a36c4d

https://github.com/gchq/CyberChef/compare/v10.24.0...v11.0.0

https://github.com/gchq/CyberChef/issues/2344

https://github.com/gchq/CyberChef/pull/2346

https://www.cve.org/CVERecord?id=CVE-2026-42615

CVSS Analysis

CVSS v3.1

7.2

Exploitability

Attack Vector

NetworkAV:N

Attack Complexity

LowAC:L

Privileges Required

NonePR:N

User Interaction

NoneUI:N

Scope

Scope

ChangedS:C

Impact

Confidentiality

LowC:L

Integrity

LowI:L

Availability

NoneA:N

7.2/CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N

Weakness Type (CWE)

Injection

Cross-site Scripting (XSS)

Ecosystems

Timeline

PublishedApr 29, 2026

ModifiedApr 29, 2026