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OpenSSL 4.0.3 Is Out as Another Security Patch Release, Update Now

Written By
MN
Marcus Nestor
Oct 9, 2026

Coming a month after OpenSSL 4.0.2, the OpenSSL 4.0.3 release is here to address several important security vulnerabilities, including a use-after-free in X.509 extension cache under concurrent use (CVE-2026-84783), and a potential CPU DoS via O(n^2) fragment reassembly in QUIC (CVE-2026-42772).
MN

Marcus Nestor

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