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CVE-2026-42615
HIGH7.2
Description
GCHQ CyberChef before 11.0.0 allows XSS via Show Base64 offsets, as demonstrated by the /#recipe=Show_Base64_offsets('%3Cscript substring.
CVE Details
CVSS v3.1 Score7.2
SeverityHIGH
CVSS VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N
Attack VectorNETWORK
ComplexityLOW
Privileges RequiredNONE
User InteractionNONE
Published4/29/2026
Last Modified4/30/2026
Sourcenvd
Honeypot Sightings0
Weaknesses (CWE)
CWE-79
References
https://github.com/gchq/CyberChef/compare/v10.24.0...v11.0.0(cve@mitre.org)
https://github.com/gchq/CyberChef/issues/2344(cve@mitre.org)
https://github.com/gchq/CyberChef/pull/2346(cve@mitre.org)
IOC Correlations
No correlations recorded
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