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Fedora 43 python-idna Important Denial of Service Fix 2026-6215e65f6c

fedora
Calendar Grey July 25, 2026
Scroller Fedora
Stay updated with Fedora 43's python-idna release addressing CVE-2026-45409 and CVE-2024-3651, crucial for robustness.
A new version of python-idna (3.18) has been released in Fedora 43, fixing vulnerabilities CVE-2026-45409 and CVE-2024-3651, while supporting updated IDNA protocols.

Summary

A library to support the Internationalised Domain Names in Applications (IDNA)

protocol as specified in RFC 5891 . This

version of the protocol is often referred to as "IDNA2008" and can produce

different results from the earlier standard from 2003.

The library is also intended to act as a suitable drop-in replacement for the

"encodings.idna" module that comes with the Python standard library but

currently only supports the older 2003 specification.

Update Information:

Update to the latest version to bring fixes for CVE-2026-45409 and CVE-2024-3651 into the stable releases.

Topics%20covered

Topics Covered

security advisory denial of service fedora bug fix important python-idna

Change Log

* Tue Jun 9 2026 Lumir Balhar - 3.18-1 - Update to 3.18 (rhbz#2483976) * Wed Jun 3 2026 Python Maint - 3.17-2 - Rebuilt for Python 3.15 * Sun May 31 2026 Lumir Balhar - 3.17-1 - Update to 3.17 (rhbz#2480667) * Wed May 13 2026 Lumir Balhar - 3.15-1 - Update to 3.15 (rhbz#2476912) * Mon May 11 2026 Lumir Balhar - 3.14-1 - Update to 3.14 (rhbz#2468686) * Thu Apr 23 2026 Lumir Balhar - 3.13-1 - Update to 3.13 (rhbz#2460821) * Sat Jan 17 2026 Fedora Release Engineering - 3.11-2 - Rebuilt for https://fedoraproject.org/wiki/Fedora_44_Mass_Rebuild * Sun Oct 12 2025 Lumir Balhar - 3.11-1 - Update to 3.11 (rhbz#2403375)

References


[ 1 ] Bug #2498560 - CVE-2026-45409 python-idna: idna: Denial of Service via specially crafted long inputs [fedora-all] https://bugzilla.redhat.com/show_bug.cgi?id=2498560

Update Instructions

This update can be installed with the "dnf" update program. Use su -c 'dnf upgrade --advisory FEDORA-2026-6215e65f6c' at the command line. For more information, refer to the dnf documentation available at http://dnf.readthedocs.io/en/latest/command_ref.html#upgrade-command-label

Severity
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Name: python-idna
Product: Fedora 43
Version: 3.18
Release: 1.fc43
URL: https://github.com/kjd/idna
Summary: Internationalized Domain Names in Applications (IDNA)

Topics%20covered

Topics Covered

security advisory denial of service fedora bug fix important python-idna

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