python3-idna: Python is an interpreted, interactive, object-oriented programming language, which includes modules, classes, excepti...
CVE-2026-45409 is fixed in 15 products on 1 platform, first by python3-idna 3.3-1ubuntu0.2, released June 5, 2026. It is not reported as exploited. Patch Radar priority: Routine.
Python is an interpreted, interactive, object-oriented programming language, which includes modules, classes, exceptions, very high level dynamic data types and dynamic typing. Python supports interfaces to many system calls and libraries, as well as to various windowing systems. Security Fix(es): * python-idna: idna: Denial of Service via specially crafted long inputs (CVE-2026-45409) For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Linux | |||
| mingw-python-idna · Fedora 43 | 3.18-1.fc43 | FEDORA-2026-9DBF4D0CA8 | Jul 12, 2026 |
| mingw32-python3-idna · Fedora 43 | 3.18-1.fc43 | FEDORA-2026-9DBF4D0CA8 | Jul 12, 2026 |
| mingw64-python3-idna · Fedora 43 | 3.18-1.fc43 | FEDORA-2026-9DBF4D0CA8 | Jul 12, 2026 |
| python-idna · Debian 13.5 (trixie) | 3.10-1+deb13u1 | DEBIAN-CVE-2026-45409 | Jun 27, 2026 |
| python-idna · Debian 14 | 3.11-1.1 | DEBIAN-CVE-2026-45409 | Jun 27, 2026 |
| python-idna · Fedora 43 | 3.18-1.fc43 | FEDORA-2026-6215E65F6C | Jul 10, 2026 |
| python-idna · RHEL 10 | 3.7-6.el10_2 | RHSA-2026:54481 | Jun 5, 2026 |
| python-idna · opensuse-leap 16.0 | 3.10-160000.3.1 | OPENSUSE-SU-2026:21048-1 | Jun 24, 2026 |
| python-idna · rocky 10 | 0:3.7-6.el10_2 | RLSA-2026:54481 | Aug 13, 2026 |
| python-idna · rocky 8 | 0:2.5-8.el8_10 | RLSA-2026:54290 | Aug 13, 2026 |
| python-idna · rocky 9 | 0:2.10-8.el9_8 | RLSA-2026:54484 | Aug 13, 2026 |
| python-idna · sles 15.7 | 2.6-150000.3.9.1 | SUSE-SU-2026:3100-1 | Jul 17, 2026 |
| python-idna · sles 16.0 | 3.10-160000.3.1 | SUSE-SU-2026:22356-1 | Jun 24, 2026 |
| python3-idna · Fedora 43 | 3.18-1.fc43 | FEDORA-2026-6215E65F6C | Jul 10, 2026 |
| python3-idna · RHEL 8 | 0:2.5-8.el8_10 | RHSA-2026:54290 | Aug 13, 2026 |
| python3-idna · RHEL 9 | 0:2.10-8.el9_8 | RHSA-2026:54484 | Aug 14, 2026 |
| python3-idna · Ubuntu 22.04.1 LTS (jammy) | 3.3-1ubuntu0.2 | python3-idna 3.3-1ubuntu0.2 | Jun 5, 2026 |
| python3-idna · Ubuntu 24.04.5 LTS (noble) | 3.6-2ubuntu0.2 | python3-idna 3.6-2ubuntu0.2 | Jun 5, 2026 |
| python3-idna · Ubuntu 26.04.1 LTS (resolute) | 3.11-1ubuntu0.1 | python3-idna 3.11-1ubuntu0.1 | Jun 5, 2026 |
| python3-idna · almalinux 10 | 3.7-6.el10_2 | ALSA-2026:54481 | Aug 13, 2026 |
| python3-idna · almalinux 8 | 2.5-8.el8_10 | ALSA-2026:54290 | Aug 12, 2026 |
| python3-idna · almalinux 9 | 2.10-8.el9_8 | ALSA-2026:54484 | Aug 13, 2026 |
| python3-idna · amzn 2023 | 2.10-3.amzn2023.0.4 | ALAS2023-2026-2052 | Aug 17, 2026 |
| python3-idna · ol 10 | 0:3.7-6.el10_2 | ELSA-2026-54481 | Aug 13, 2026 |
| python3-idna · ol 8 | 0:2.5-8.el8_10 | ELSA-2026-54290 | Aug 12, 2026 |
| python3-idna · ol 9 | 0:2.10-8.el9_8 | ELSA-2026-54484 | Aug 13, 2026 |
| python3-pip · amzn 2023 | 21.3.1-2.amzn2023.0.21 | ALAS2023-2026-2092 | Aug 31, 2026 |
| python3-pip-wheel · amzn 2023 | 21.3.1-2.amzn2023.0.21 | ALAS2023-2026-2092 | Aug 31, 2026 |
| python3.11-pip · amzn 2023 | 22.3.1-2.amzn2023.0.14 | ALAS2023-2026-2090 | Aug 31, 2026 |
| python3.11-pip-wheel · amzn 2023 | 22.3.1-2.amzn2023.0.14 | ALAS2023-2026-2090 | Aug 31, 2026 |
| python3.12-pip · amzn 2023 | 23.2.1-4.amzn2023.0.11 | ALAS2023-2026-2091 | Aug 31, 2026 |
| python3.12-pip-wheel · amzn 2023 | 23.2.1-4.amzn2023.0.11 | ALAS2023-2026-2091 | Aug 31, 2026 |
| python3.13-pip · amzn 2023 | 24.2-259.amzn2023.0.8 | ALAS2023-2026-2089 | Aug 31, 2026 |
| python3.13-pip-wheel · amzn 2023 | 24.2-259.amzn2023.0.8 | ALAS2023-2026-2089 | Aug 31, 2026 |
| python3.14-pip · amzn 2023 | 26.1.1-1.amzn2023.0.3 | ALAS2023-2026-2093 | Aug 31, 2026 |
| python3.14-pip-wheel · amzn 2023 | 26.1.1-1.amzn2023.0.3 | ALAS2023-2026-2093 | Aug 31, 2026 |
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