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Fedora 43 Python-Cryptography Addresses Major DNS SAN Security Flaw

Update to v46.0.6 This includes a single fix for security issue: * **SECURITY ISSUE**: Fixed a bug where name constraints were not applied to peer names during verification when the leaf certificate contains a wildcard DNS SAN. Ordinary X.509 topologies are not affected by this bug,. -------------------------------------------------------------------------------- Fedora Update Notification FEDORA-2026-6c010af7be 2026-03-30 00:53:25.964755+00:00 -------------------------------------------------------------------------------- Name : python-cryptography Product : Fedora 43 Version : 46.0.6 Release : 1.fc43 URL : https://cryptography.io/en/latest/ Summary : PyCA's cryptography library Description : cryptography is a package designed to expose cryptographic primitives and recipes to Python developers. -------------------------------------------------------------------------------- Update Information: Update to v46.0.6 This includes a single fix for security issue: * **SECURITY ISSUE**: Fixed a bug where name constraints were not applied to peer names during verification when the leaf certificate contains a wildcard DNS SAN. Ordinary X.509 topologies are not affected by this bug, including those used by the Web PKI. Credit to **Oleh Konko (1seal)** for reporting the issue. **CVE-2026-34073** -------------------------------------------------------------------------------- ChangeLog: * Thu Mar 26 2026 Jeremy Cline - 46.0.6-1 - Update to v46.0.6 -------------------------------------------------------------------------------- References: [ 1 ] Bug #2451584 - python-cryptography-46.0.6 is available https://bugzilla.redhat.com/show_bug.cgi?id=2451584 -------------------------------------------------------------------------------- This update can be installed with the "dnf" update program. Use su -c 'dnf upgrade --advisory FEDORA-2026-6c010af7be' at the command line. For more information, refer to the dnf documentationavailable at http://dnf.readthedocs.io/en/latest/command_ref.html#upgrade-command-label All packages are signed with the Fedora Project GPG key. More details on the GPG keys used by the Fedora Project can be found at https://fedoraproject.org/keys -------------------------------------------------------------------------------- -- _______________________________________________ package-announce mailing list -- This email address is being protected from spambots. You need JavaScript enabled to view it. To unsubscribe send an email to This email address is being protected from spambots. You need JavaScript enabled to view it. Fedora Code of Conduct: https://docs.fedoraproject.org/en-US/project/code-of-conduct/ List Guidelines: https://fedoraproject.org/wiki/Mailing_list_guidelines List Archives: https://lists.fedoraproject.org/archives/list/This email address is being protected from spambots. You need JavaScript enabled to view it. Do not reply to spam, report it: https://forge.fedoraproject.org/infra/tickets/issues/new . Critical security advisory for Fedora 43 addressing a bug in python-cryptography related to DNS SAN. Update now!. Fedora 43 Update, python-cryptography Security, DNS SAN Issue, Certificate Verification, Critical Advisory. . Severity: Critical. LinuxSecurity.com Team

Mar 30, 2026 •Critical Fedora