EUVD-2026-26191
Cross-site Scripting (XSS) (CWE-79)
GHSA-h4hv-92pp-pcjg
7.2
CVSS 3.1 · NVD
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Severity by source
NVD
PRIMARY
7.2
HIGH
AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N
Primary rating from NVD · only source for this CVE.
CVSS VectorNVD
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Changed
Confidentiality
Low
Integrity
Low
Availability
None
Lifecycle Timeline
4
Patch released
Apr 30, 2026 - 15:48 nvd
Patch available
Patch available
Apr 29, 2026 - 06:16 EUVD
EUVD ID Assigned
Apr 29, 2026 - 03:45 euvd
EUVD-2026-26191
CVE Published
Apr 29, 2026 - 02:55 nvd
HIGH 7.2
DescriptionCVE.org
GCHQ CyberChef before 11.0.0 allows XSS via Show Base64 offsets, as demonstrated by the /#recipe=Show_Base64_offsets('%3Cscript substring.
Analysis
GCHQ CyberChef before 11.0.0 allows XSS via Show Base64 offsets, as demonstrated by the /#recipe=Show_Base64_offsets('%3Cscript substring.
CVE-2019-15532
MEDIUM
POC
6.1
Aug 26
CyberChef before 8.31.2 allows XSS in core/operations/TextEncodingBruteForce.mjs. Rated medium severity (CVSS 6.1), this
CVE-2026-57439
MEDIUM
5.0
Jul 08
Prototype pollution in CyberChef prior to 11.2.0 enables cross-site scripting via a chained operation attack. The Series
Same weakness CWE-79 – Cross-site Scripting (XSS)
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External POC / Exploit Code
Leaving vuln.today
Destination URL
POC code from unknown sources may be malicious, contain backdoors, or be fake.
Always review and test exploit code in a safe, isolated environment (VM/sandbox).
Verify the source reputation and cross-reference with known databases (Exploit-DB, GitHub Security).