CyberChef is a web app for encryption, encoding, compression, and data analysis. Prior to 11.2.0, the Series Chart operation accepts proto as a key while parsing user-supplied CSV, allowing prototype pollution that can be chained with operations such as Parse UDP to inject malicious JavaScript into HTML output. This issue is fixed in version 11.2.0.
{
"cna_assigner": "GitHub_M",
"cwe_ids": [
"CWE-1321",
"CWE-79"
],
"osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/57xxx/CVE-2026-57439.json"
}{
"extracted_events": [
{
"range": [
{
"introduced": "0"
},
{
"fixed": "11.2.0"
}
],
"source": "AFFECTED_FIELD",
"strategy": "StringRangeExpression"
},
{
"range": [
{
"fixed": "85db3be5d0096859b810f0e8d3e151d5dc9b948f"
}
],
"source": "REFERENCES_COMMIT"
},
{
"original_tag": "v11.2.0",
"range": [
{
"fixed": "d358d82cbcb269d764a2deb598a37043bd054f45"
}
],
"source": "REFERENCES_TAG"
}
]
}