CVE-2026-42615

HIGH

Gchq CyberChef < 11.0.0 - XSS

Title source: rule
STIX 2.1

Description

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

References (4)

Scores

CVSS v3 7.2
EPSS 0.0001
EPSS Percentile 1.1%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N

CISA SSVC

Vulnrichment
Exploitation none
Automatable no
Technical Impact partial

Details

CWE
CWE-79
Status published
Products (1)
GCHQ/CyberChef < 11.0.0
Published Apr 29, 2026
Tracked Since Apr 29, 2026