CVE-2026-54897

EIP tracks 1 public exploit for CVE-2026-54897. PoCs published by HermesNA-1.

AI-analyzed exploit summary This repository contains an auto-generated stub module for CVE-2026-54897, a heap use-after-free vulnerability in Oj (Optimized JSON) Ruby gem (<3.17.2). The module includes placeholder code for probing target connectivity but lacks actual exploit implementation for the iterator-based use-after-free.

Oj (Optimized JSON) is a JSON parser and Object marshaller packaged as a Ruby gem. Prior to 3.17.2, Oj::Doc iterators (each_value, each_child, each_leaf) were vulnerable to a heap use-after-free. When a Ruby block yielded during iteration calls doc.close or d.close, the document's heap memory is freed while the C iterator is still running. When control returns from the block, the iterator reads from the freed region, producing a use-after-free accessible from pure Ruby. This issue has been fixed in version 3.17.2.