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September 2026

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stunnel 5.82 released
by Michał Trojnara 17 Sep '26

17 Sep '26

Dear Users, I have released version 5.82 of stunnel. ### Version 5.82, 2026.09.17, urgency: MEDIUM * Bugfixes - Fixed premature connection closure on macOS when the peer half-closed the plaintext connection while data still needed to be forwarded. * Features - Build compatibility with LibreSSL 4.3.2 (thanks to Masahito Yamaga). Home page: https://www.stunnel.org/ Download: https://www.stunnel.org/downloads.html SHA-256 hashes: 8e7438ccd6b3a2ab05182d0846e112a56a7f557ecdee40de07bf67820008bef7 stunnel-5.82.tar.gz 722c1ad626919af2b0034666b4d19cc4795e925c32f60e8f3c59af4fb3ad2dfc stunnel-5.82-win64-installer.exe e5bdb7fefaac57afebd8276165b2c69b92b4e717d0a00302d2431541936cb60a stunnel-5.82-android.zip Best regards, Mike

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stunnel 5.81 released
by Michał Trojnara 16 Sep '26

16 Sep '26

Dear Users, I have released version 5.81 of stunnel. ### Version 5.81, 2026.09.16, urgency: HIGH * Security bugfixes - OpenSSL DLLs updated to version 3.5.8. - Fixed truncation and out-of-bounds reads when inheriting binary session ticket keys containing null bytes (thanks to Jose A. Diaz). - Prevented OCSP stapling response failures from terminating the daemon (thanks to Jose A. Diaz). * Bugfixes - Avoided spurious sysconf error messages after successful descriptor-limit queries on platforms where a successful call may change errno. - Fixed a potential crash when parsing empty ASCII PSK secrets (thanks to Jose A. Diaz). - Fixed a memory leak after DTLS listener poll errors and timeouts (thanks to Jose A. Diaz). - Fixed memory leaks during NTLM HTTP proxy negotiation (thanks to Jose A. Diaz). - Fixed early startup logging before thread lock initialization (thanks to Jose A. Diaz). - Rejected excessively nested configuration includes instead of consuming the process stack recursively. * Features - Improved TLS and DTLS shutdown diagnostics. Home page: https://www.stunnel.org/ Download: https://www.stunnel.org/downloads.html SHA-256 hashes: 1d1b48fa26a06a5a035ca5ddc7377c75d5d78ad6f3b4886352a84818c854f932 stunnel-5.81.tar.gz ec16df6313dced7c84f20dbb9c677847d0a5219bdd35ab40cde18c135abd0411 stunnel-5.81-win64-installer.exe 5eec038e3a9c44d135942c2486ffa5156c02cfcf31bb5b7a65c6134c459a49f9 stunnel-5.81-android.zip Best regards, Mike

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