CVE-2026-54899

CVE-2026-54899

Oj (Optimized JSON) is a JSON parser and Object marshaller packaged as a Ruby gem. Prior to version 3.17.2, disabling symbol_keys on a reused Oj::Parser instance triggers a heap use-after-free. When symbol_keys is toggled from true to fals…

Vulnerability class: Use-After-Free

Weakness classification (CWE)

References