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CVE Vulnerability Details :
CVE-2026-42615
PUBLISHED
More InfoOfficial Page
Assigner-mitre
Assigner Org ID-8254265b-2729-46b6-b9e3-3dfca2d5bfca
View Known Exploited Vulnerability (KEV) details
Published At-29 Apr, 2026 | 02:55
Updated At-29 Apr, 2026 | 13:14
Rejected At-
▼CVE Numbering Authority (CNA)

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

Affected Products
Vendor
GCHQ
Product
CyberChef
Default Status
unaffected
Versions
Affected
  • From 0 before 11.0.0 (semver)
Problem Types
TypeCWE IDDescription
CWECWE-79CWE-79 Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting')
Type: CWE
CWE ID: CWE-79
Description: CWE-79 Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting')
Metrics
VersionBase scoreBase severityVector
3.17.2HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N
Version: 3.1
Base score: 7.2
Base severity: HIGH
Vector:
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N
Metrics Other Info
Impacts
CAPEC IDDescription
Solutions
Configurations
Workarounds
Exploits
Credits
Timeline
EventDate
Replaced By
Rejected Reason
References
HyperlinkResource
https://github.com/gchq/CyberChef/issues/2344
N/A
https://github.com/gchq/CyberChef/commit/9641ae07f92e9af50f10e978385465b2f4a36c4d
N/A
https://github.com/gchq/CyberChef/compare/v10.24.0...v11.0.0
N/A
https://github.com/gchq/CyberChef/pull/2346
N/A
Hyperlink: https://github.com/gchq/CyberChef/issues/2344
Resource: N/A
Hyperlink: https://github.com/gchq/CyberChef/commit/9641ae07f92e9af50f10e978385465b2f4a36c4d
Resource: N/A
Hyperlink: https://github.com/gchq/CyberChef/compare/v10.24.0...v11.0.0
Resource: N/A
Hyperlink: https://github.com/gchq/CyberChef/pull/2346
Resource: N/A
▼Authorized Data Publishers (ADP)
CISA ADP Vulnrichment
Affected Products
Metrics
VersionBase scoreBase severityVector
Metrics Other Info
Impacts
CAPEC IDDescription
Solutions
Configurations
Workarounds
Exploits
Credits
Timeline
EventDate
Replaced By
Rejected Reason
References
HyperlinkResource
Details not found