{"cve":"CVE-2009-2477","nvd":{"published":"2009-07-15T15:30:01.453","modified":"2026-06-16T23:09:32.107","status":"Modified","description":"js/src/jstracer.cpp in the Just-in-time (JIT) JavaScript compiler (aka TraceMonkey) in Mozilla Firefox 3.5 before 3.5.1 allows remote attackers to execute arbitrary code via certain use of the escape function that triggers access to uninitialized memory locations, as originally demonstrated by a document containing P and FONT elements.","cvss_v4":null,"cvss_v3":null,"cwes":["CWE-94"],"references":["http://blog.mozilla.com/security/2009/07/14/critical-javascript-vulnerability-in-firefox-35/","http://isc.sans.org/diary.html?storyid=6796","http://secunia.com/advisories/35798","http://sunsolve.sun.com/search/document.do?assetkey=1-66-266148-1","http://voices.washingtonpost.com/securityfix/2009/07/stopgap_fix_for_critical_firef.html"],"products":["mozilla:firefox"],"source":"nvd","synced_at":"2026-10-19T19:54:07.895733559+00:00"},"epss":{"cve":"CVE-2009-2477","score":0.4254,"percentile":0.98708,"date":"2026-10-31"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}