CVE-2026-45186
In libexpat before 2.8.1, the computational complexity of attribute name collision checks allows a denial of service via moderately sized crafted XML input.
CVE-2026-45186 is fixed in 14 products on 1 platform, first by RHSA-2026:22715, released May 10, 2026. It is not reported as exploited. Patch Radar priority: High.
High
CVSS
8.2
Low
Exploitation
None reported
No vendor assessment
CISA KEV
Not listed
Not in the Known Exploited Vulnerabilities catalog
EPSS
0.0048
41st percentile
In libexpat before 2.8.1, the computational complexity of attribute name collision checks allows a denial of service via moderately sized crafted XML input.
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Linux | |||
| MozillaFirefox · opensuse-leap 16.0 | 153.5.0-160000.1.1 | OPENSUSE-SU-2026:22139-1 | Nov 7, 2026 |
| MozillaFirefox · sles 15.6 | 153.5.0-150400.157.16.1 | SUSE-SU-2026:4834-1 | Nov 7, 2026 |
| MozillaFirefox · sles 15.7 | 153.5.0-150400.157.16.1 | SUSE-SU-2026:4834-1 | Nov 7, 2026 |
| MozillaFirefox · sles 16.0 | 153.5.0-160000.1.1 | SUSE-SU-2026:24260-1 | Nov 7, 2026 |
| MozillaThunderbird · sles 15.7 | 153.5.0-150400.13.9.1 | SUSE-SU-2026:4736-1 | Nov 7, 2026 |
| expat · Debian 12.15 (bookworm) | 2.5.0-1+deb12u4 | DEBIAN-CVE-2026-45186 | May 27, 2026 |
| expat · Debian 13.5 (trixie) | 2.8.2-1~deb13u1 | DEBIAN-CVE-2026-45186 | May 27, 2026 |
| expat · Debian 14 | 2.8.0-2 | DEBIAN-CVE-2026-45186 | May 27, 2026 |
| expat · RHEL 10 | 2.7.3-1.el10_2.1 | RHSA-2026:22715 | May 10, 2026 |
| expat · RHEL 8 | 0:2.5.0-2.el8_10 | RHSA-2026:22721 | Jun 24, 2026 |
| expat · RHEL 9 | 0:2.5.0-6.el9_8.1 | RHSA-2026:23230 | Jun 24, 2026 |
| expat · Ubuntu 24.04.5 LTS (noble) | 2.6.1-2ubuntu0.5 | expat 2.6.1-2ubuntu0.5 | Jun 21, 2026 |
| expat · Ubuntu 26.04.1 LTS (resolute) | 2.7.4-1ubuntu0.1 | expat 2.7.4-1ubuntu0.1 | Jun 21, 2026 |
| expat · almalinux 10 | 2.7.3-1.el10_2.1 | ALSA-2026:22715 | Jun 3, 2026 |
| expat · almalinux 8 | 2.5.0-2.el8_10 | ALSA-2026:22721 | Jun 3, 2026 |
| expat · almalinux 9 | 2.5.0-6.el9_8.1 | ALSA-2026:23230 | Jun 4, 2026 |
| expat · ol 10 | 0:2.7.3-1.el10_2.1 | ELSA-2026-22715 | Jul 16, 2026 |
| expat · ol 8 | 0:2.5.0-2.el8_10 | ELSA-2026-22721 | Jun 3, 2026 |
| expat · ol 9 | 0:2.5.0-6.el9_8.1 | ELSA-2026-23230 | Jun 23, 2026 |
| expat · opensuse-leap 16.0 | 2.8.4-160000.1.1 | OPENSUSE-SU-2026:21945-1 | Sep 24, 2026 |
| expat · rocky 10 | 0:2.7.3-1.el10_2.1 | RLSA-2026:22715 | Jun 5, 2026 |
| expat · rocky 8 | 0:2.5.0-2.el8_10 | RLSA-2026:22721 | Jun 5, 2026 |
| expat · rocky 9 | 0:2.5.0-6.el9_8.1 | RLSA-2026:23230 | Jun 5, 2026 |
| expat · sles 15.6 | 2.8.5-150400.3.40.1 | SUSE-SU-2026:4623-1 | Nov 7, 2026 |
| expat · sles 15.7 | 2.8.5-150700.3.15.1 | SUSE-SU-2026:4619-1 | Nov 7, 2026 |
| expat · sles 16.0 | 2.8.4-160000.1.1 | SUSE-SU-2026:23912-1 | Sep 24, 2026 |
| expat-devel · RHEL 8 | 0:2.5.0-2.el8_10 | RHSA-2026:22721 | Jun 24, 2026 |
| expat-devel · RHEL 9 | 0:2.5.0-6.el9_8.1 | RHSA-2026:23230 | Jun 24, 2026 |
| expat-devel · almalinux 10 | 2.7.3-1.el10_2.1 | ALSA-2026:22715 | Jun 3, 2026 |
| expat-devel · almalinux 8 | 2.5.0-2.el8_10 | ALSA-2026:22721 | Jun 3, 2026 |
| expat-devel · almalinux 9 | 2.5.0-6.el9_8.1 | ALSA-2026:23230 | Jun 4, 2026 |
| expat-devel · ol 10 | 0:2.7.3-1.el10_2.1 | ELSA-2026-22715 | Jul 16, 2026 |
| expat-devel · ol 8 | 0:2.5.0-2.el8_10 | ELSA-2026-22721 | Jun 3, 2026 |
| expat-devel · ol 9 | 0:2.5.0-6.el9_8.1 | ELSA-2026-23230 | Jun 23, 2026 |
| firefox · RHEL 10 | 153.5.0-1.el10_2 | RHSA-2026:89758 | Oct 31, 2026 |
| firefox · RHEL 8 | 0:153.5.0-1.el8_10 | RHSA-2026:89756 | Oct 31, 2026 |
| firefox · RHEL 9 | 0:153.5.0-1.el9_8 | RHSA-2026:89757 | Oct 31, 2026 |
| firefox · almalinux 10 | 153.5.0-1.el10_2 | ALSA-2026:89758 | Nov 7, 2026 |
| firefox · almalinux 8 | 153.5.0-1.el8_10 | ALSA-2026:89756 | Nov 7, 2026 |
| firefox · almalinux 9 | 153.5.0-1.el9_8 | ALSA-2026:89757 | Nov 7, 2026 |
| firefox · amzn 2023 | 140.10.2-1.amzn2023.0.3 | ALAS2023-2026-1725 | May 25, 2026 |
| firefox · ol 10 | 0:153.5.0-1.0.1.el10_2 | ELSA-2026-89758 | Nov 7, 2026 |
| firefox · ol 8 | 0:153.5.0-1.0.1.el8_10 | ELSA-2026-89756 | Nov 7, 2026 |
| firefox · ol 9 | 0:153.5.0-1.0.1.el9_8 | ELSA-2026-89757 | Nov 7, 2026 |
| firefox · rocky 10 | 0:153.5.0-1.el10_2 | RLSA-2026:89758 | Nov 7, 2026 |
| firefox · rocky 8 | 0:153.5.0-1.el8_10 | RLSA-2026:89756 | Nov 7, 2026 |
| firefox · rocky 9 | 0:153.5.0-1.el9_8 | RLSA-2026:89757 | Nov 7, 2026 |
| firefox-debuginfo · amzn 2023 | 140.10.2-1.amzn2023.0.3 | ALAS2023-2026-1725 | May 25, 2026 |
| firefox-debugsource · amzn 2023 | 140.10.2-1.amzn2023.0.3 | ALAS2023-2026-1725 | May 25, 2026 |
| firefox-x11 · RHEL 9 | 0:153.5.0-1.el9_8 | RHSA-2026:89757 | Oct 31, 2026 |
| firefox-x11 · almalinux 9 | 153.5.0-1.el9_8 | ALSA-2026:89757 | Nov 7, 2026 |
| firefox-x11 · ol 9 | 0:153.5.0-1.0.1.el9_8 | ELSA-2026-89757 | Nov 7, 2026 |
| libexpat1 · Ubuntu 24.04.5 LTS (noble) | 2.6.1-2ubuntu0.5 | libexpat1 2.6.1-2ubuntu0.5 | Jun 21, 2026 |
| libexpat1 · Ubuntu 26.04.1 LTS (resolute) | 2.7.4-1ubuntu0.1 | libexpat1 2.7.4-1ubuntu0.1 | Jun 21, 2026 |
| python312 · sles 15.6 | 3.12.14-150600.3.68.1 | SUSE-SU-2026:4534-1 | Oct 6, 2026 |
| python312-core · sles 15.6 | 3.12.14-150600.3.68.1 | SUSE-SU-2026:4534-1 | Oct 6, 2026 |
| python313 · sles 15.7 | 3.13.14-150700.4.53.1 | SUSE-SU-2026:3649-1 | Aug 19, 2026 |
| python313-core · sles 15.7 | 3.13.14-150700.4.53.1 | SUSE-SU-2026:3649-1 | Aug 19, 2026 |
| thunderbird · RHEL 10 | 153.5.0-1.el10_2 | RHSA-2026:90895 | May 10, 2026 |
| thunderbird · RHEL 9 | 0:153.5.0-1.el9_8 | RHSA-2026:93443 | Nov 3, 2026 |
| thunderbird · almalinux 10 | 153.5.0-1.el10_2.alma.1 | ALSA-2026:90895 | Nov 7, 2026 |
| thunderbird · almalinux 9 | 153.5.0-1.el9_8.alma.1 | ALSA-2026:93443 | Nov 7, 2026 |
| thunderbird · ol 10 | 0:153.5.0-1.0.1.el10_2 | ELSA-2026-90895 | Nov 7, 2026 |
| thunderbird · ol 9 | 0:153.5.0-1.0.1.el9_8 | ELSA-2026-93443 | Nov 7, 2026 |
| thunderbird · rocky 10 | 0:153.5.0-1.el10_2 | RLSA-2026:90895 | Nov 7, 2026 |
| thunderbird · rocky 9 | 0:153.5.0-1.el9_8 | RLSA-2026:93443 | Nov 7, 2026 |
Patch Radar data is free to use with attribution. Terms and how to credit it.
Product names, logos and trademarks shown on Patch Radar belong to their respective owners. They are used only to identify the software each security fix applies to and to help readers find their platform. Their use does not imply any affiliation with, or endorsement by, those owners, and Patchblox is not affiliated with any of them.