VULNERABILITY INTELLIGENCE

CVE-2021-45958

CVSS score5.5 MEDIUM

EPSS probability1.67%

CISA KEVNot currently listed

Published2022-01-01

Last modified2026-06-17

Description

UltraJSON (aka ujson) through 5.1.0 has a stack-based buffer overflow in Buffer_AppendIndentUnchecked (called from encode). Exploitation can, for example, use a large amount of indentation.