Search Results (1 CVEs found)

CVE Vendors Products Updated CVSS v3.1
CVE-2026-54911 2 Ultrajson, Ultrajson Project 2 Ultrajson, Ultrajson 2026-06-23 6.5 Medium
UltraJSON is a fast JSON encoder and decoder written in pure C with bindings for Python 3.7+. Prior to 5.13.0, ujson.dumps() (or ujson.dump() or ujson.encode()) have a reject_bytes=False option. When set, they may accept malformed or truncated UTF-8 byte sequences, silently rewriting them into different Unicode characters instead of rejecting them. This leads to input validation bypass and data integrity issues. This vulnerability is fixed in 5.13.0.