CVE-2026-54500: Out-of-bounds Read

Oj Optimized JSON is a JSON parser and Object marshaller packaged as a Ruby gem. In versions prior to 3.17.3, Oj.load in :object mode reads uninitialized stack memory and, for long keys, reads out of bounds when parsing a JSON object whose key is 254 bytes or longer. The interned bytes can surfac...

Use of Uninitialized Resource

Overview Affected versions of this package are vulnerable to Use of Uninitialized Resource in the formattr function when parsing a JSON object with a key of 254 bytes or longer using Oj.load in :object mode. An attacker can obtain sensitive stack memory contents by supplying a crafted JSON payloa...