CVE-2026-42615

CVE-2026-42615

CVSS 7.2 HIGHEPSS 0.3%CWE-79

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

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

Affected products

GCHQ · CyberChef

Want to know if your infrastructure is exposed to this?

Talk to TrueHacking →

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