CyberChef: Prototype pollution in Series Chart operation

On 5 June 2026 CyberChef received a security vulnerability report from @hyuunnn detailing a vulnerability in the Series Chart operation, where malicious input could result in prototype pollution of the data structures outputted from the operation. Other operations following Series Chart could hav...

GHSA-FX6F-382R-J72C CyberChef: Prototype pollution in Series Chart operation

On 5 June 2026 CyberChef received a security vulnerability report from @hyuunnn detailing a vulnerability in the Series Chart operation, where malicious input could result in prototype pollution of the data structures outputted from the operation. Other operations following Series Chart could hav...

PT-2026-56483

Name of the Vulnerable Software and Affected Versions CyberChef versions prior to 11.2.0 Description The Series Chart operation allows prototype pollution when parsing user-supplied CSV data because it accepts proto as a key. Prototype pollution is a technique where an attacker manipulates the...

CVE-2026-57439: Improper Neutralization of Input During Web Page Generation

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 in...

Out-of-bounds Write

Overview Affected versions of this package are vulnerable to Out-of-bounds Write in the ParseUDP function. An attacker can cause the application to crash or exhaust resources by sending a single crafted UDP packet with an invalid fragment sequence number. Remediation Upgrade...