CVE-2009-3881
CWE-200Published: November 9, 2009· Updated: Jun 16, 2026
Official Description
Sun Java SE 5.0 before Update 22 and 6 before Update 17, and OpenJDK, does not prevent the existence of children of a resurrected ClassLoader, which allows remote attackers to gain privileges via unspecified vectors, related to an "information leak vulnerability," aka Bug Id 6636650.
Technical Analysis
CVE-2009-3881 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.
Exploitation requires some privileges, which limits the exposure to scenarios where an attacker has already gained initial access.
From a weakness classification perspective (CWE-200): Information exposure vulnerabilities leak sensitive data to unauthorized actors.
CVSS v3.1 Vector Breakdown
Affected Vendors & Products
Exploit & PoC Resources
Official Patches & Advisories
All References (16)
Quick Facts
Related CVEs (CWE-200)
Recommended Actions
- →Apply vendor patches immediately
- →Monitor CVE-2009-3881 in threat intel feeds
- →Review IDS/IPS signatures for exploitation attempts