CVE-2010-4334: The IO::Socket::SSL module 1.35 for Perl, when verify_mode is not VERIFY_NONE, fails open to VERIFY_NONE in...

Security readout for executives and security teams

CVE-2010-4334 affects Perl software using IO::Socket::SSL 1.35. If certificate verification was intended but the configured CA file or path could not be verified, the module could silently disable verification. That can undermine trust in TLS connections and expose sensitive communications to certificate-bypass risk. Exposure is likely limited to Perl applications or packaged software using IO::Socket::SSL 1.35 with TLS peer verification configured and a missing, invalid, or unverifiable CA file/path. The source bundle does not identify specific downstream applications. Treat as a targeted dependency hygiene issue with meaningful confidentiality impact. Prioritize remediation on systems that rely on Perl TLS connections for sensitive data or service authentication. It is not evidenced as actively exploited in the supplied sources. Mitigation focus: Inventory systems using Perl IO::Socket::SSL, especially version 1.35.; Apply package or module updates from trusted vendor advisories.; Verify configured ca_file and ca_path values exist and are readable..

Prepared

Jun 27, 2026, 18:32 UTC (UTC+00:00)

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.