CVE-2017-7813

CVE-2017-7813 is a data leakage vulnerability in the JavaScript parser of Mozilla Firefox versions prior to 56. A type casting error can cause the parser to read data beyond its intended buffer, potentially leaking limited memory information if it conforms to JavaScript identifier syntax, though it typically results in a non-exploitable crash. This vulnerability has a CVSS v3 score of 8.2 (High), indicating a network-based attack with low complexity that could lead to partial confidentiality loss and high availability impact. There is no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage.