Use After Free in Ohler55 Oj

CVE-2026-54901

Oj (Optimized JSON) is a JSON parser and Object marshaller packaged as a Ruby gem. In versions prior to 3.17.2, Oj::Parser in usual mode does not mark array_class and hash_class references during garbage collection, leading to Use-After-Fr…

Vulnerability class: Use-After-Free

Affected products

Weakness classification (CWE)

References