CVE-2026-45186
Fixed in a distro release EPSS <1%CVSS 2.9
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.
Products: libexpat_project libexpat, Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 9, Red Hat JBoss Core Services 2.4.62.SP4, Red Hat Discovery 2, Red Hat Update Infrastructure 5, Red Hat Enterprise Linux 6, Red Hat Enterprise Linux 7, Siemens SIMATIC S7-1500 CPU 1518-4 PN/DP MFP, Siemens SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP, Siemens SIPLUS S7-1500 CPU 1518-4 PN/DP MFP
Distro releases
| Release | Package | Fixed in |
|---|---|---|
| AlmaLinux 10 | expat | 2.7.3-1.el10_2.1 |
| AlmaLinux 10 | expat-devel | 2.7.3-1.el10_2.1 |
| AlmaLinux 8 | expat | 2.5.0-2.el8_10 |
| AlmaLinux 8 | expat-devel | 2.5.0-2.el8_10 |
| AlmaLinux 9 | expat | 2.5.0-6.el9_8.1 |
| AlmaLinux 9 | expat-devel | 2.5.0-6.el9_8.1 |
| Alpine 3.20 | expat | 2.8.1-r0 |
| Alpine 3.21 | expat | 2.8.1-r0 |
| Alpine 3.22 | expat | 2.8.1-r0 |
| Alpine 3.23 | expat | 2.8.1-r0 |
| Alpine 3.24 | expat | 2.8.1-r0 |
| Amazon Linux 2 | thunderbird | 140.10.2-1.amzn2.0.2 |
| Amazon Linux 2023 | firefox | 140.10.2-1.amzn2023.0.3 |
| Chainguard | expat | 2.8.1-r0 |
| Debian 12 | expat | 2.5.0-1+deb12u4 |
| Debian 13 | expat | 2.8.2-1~deb13u1 |
| Debian 14 | expat | 2.8.0-2 |
| Red Hat Enterprise Linux 10.2 | expat | 0:2.7.3-1.el10_2.1 |
| Red Hat Enterprise Linux 10.2 | expat-debuginfo | 0:2.7.3-1.el10_2.1 |
| Red Hat Enterprise Linux 10.2 | expat-debugsource | 0:2.7.3-1.el10_2.1 |
| Red Hat Enterprise Linux 10.2 | expat-devel | 0:2.7.3-1.el10_2.1 |
| Red Hat Enterprise Linux 8 | expat | 0:2.5.0-2.el8_10 |
| Red Hat Enterprise Linux 8 | expat-debuginfo | 0:2.5.0-2.el8_10 |
| Red Hat Enterprise Linux 8 | expat-debugsource | 0:2.5.0-2.el8_10 |
| Red Hat Enterprise Linux 8 | expat-devel | 0:2.5.0-2.el8_10 |
| Red Hat Enterprise Linux 9 | expat | 0:2.5.0-6.el9_8.1 |
| Red Hat Enterprise Linux 9 | expat-debuginfo | 0:2.5.0-6.el9_8.1 |
| Red Hat Enterprise Linux 9 | expat-debugsource | 0:2.5.0-6.el9_8.1 |
| Red Hat Enterprise Linux 9 | expat-devel | 0:2.5.0-6.el9_8.1 |
| Red Hat hummingbird 1 | expat | 0:2.8.5-1.1.hum1 |
| Red Hat hummingbird 1 | expat-devel | 0:2.8.5-1.1.hum1 |
| Red Hat hummingbird 1 | expat-static | 0:2.8.5-1.1.hum1 |
| Rocky Linux 10 | expat | 0:2.7.3-1.el10_2.1 |
| Rocky Linux 8 | expat | 0:2.5.0-2.el8_10 |
| Rocky Linux 9 | expat | 0:2.5.0-6.el9_8.1 |
| SUSE Linux Enterprise High Performance Computing 15 SP4-ESPOS | MozillaFirefox | 153.5.0-150400.157.16.1 |
| SUSE Linux Enterprise High Performance Computing 15 SP4-ESPOS | expat | 2.8.5-150400.3.40.1 |
| SUSE Linux Enterprise High Performance Computing 15 SP4-LTSS | MozillaFirefox | 153.5.0-150400.157.16.1 |
| SUSE Linux Enterprise High Performance Computing 15 SP4-LTSS | expat | 2.8.5-150400.3.40.1 |
| SUSE Linux Enterprise High Performance Computing 15 SP5-ESPOS | MozillaFirefox | 153.5.0-150400.157.16.1 |
| SUSE Linux Enterprise High Performance Computing 15 SP5-ESPOS | expat | 2.8.5-150400.3.40.1 |
| SUSE Linux Enterprise High Performance Computing 15 SP5-LTSS | MozillaFirefox | 153.5.0-150400.157.16.1 |
| SUSE Linux Enterprise High Performance Computing 15 SP5-LTSS | expat | 2.8.5-150400.3.40.1 |
| SUSE Linux Enterprise Micro 5.3 | expat | 2.8.5-150400.3.40.1 |
| SUSE Linux Enterprise Micro 5.4 | expat | 2.8.5-150400.3.40.1 |
| SUSE Linux Enterprise Micro 5.5 | expat | 2.8.5-150400.3.40.1 |
| SUSE Linux Enterprise Module for Basesystem 15 SP7 | expat | 2.8.5-150700.3.15.1 |
| SUSE Linux Enterprise Module for Desktop Applications 15 SP7 | MozillaFirefox | 153.5.0-150400.157.16.1 |
| SUSE Linux Enterprise Module for Package Hub 15 SP7 | MozillaThunderbird | 153.5.0-150400.13.9.1 |
| SUSE Linux Enterprise Module for Python 3 15 SP7 | python313 | 3.13.14-150700.4.53.1 |
| SUSE Linux Enterprise Module for Python 3 15 SP7 | python313-core | 3.13.14-150700.4.53.1 |
| SUSE Linux Enterprise Server 12 SP5-LTSS | MozillaFirefox | 153.5.0-118.16.2 |
| SUSE Linux Enterprise Server 12 SP5-LTSS | expat | 2.8.5-21.55.1 |
| SUSE Linux Enterprise Server 15 SP4-LTSS | MozillaFirefox | 153.5.0-150400.157.16.1 |
| SUSE Linux Enterprise Server 15 SP4-LTSS | expat | 2.8.5-150400.3.40.1 |
| SUSE Linux Enterprise Server 15 SP5-LTSS | MozillaFirefox | 153.5.0-150400.157.16.1 |
| SUSE Linux Enterprise Server 15 SP5-LTSS | expat | 2.8.5-150400.3.40.1 |
| SUSE Linux Enterprise Server 15 SP6-LTSS | MozillaFirefox | 153.5.0-150400.157.16.1 |
| SUSE Linux Enterprise Server 15 SP6-LTSS | expat | 2.8.5-150400.3.40.1 |
| SUSE Linux Enterprise Server 15 SP6-LTSS | python312 | 3.12.14-150600.3.68.1 |
| SUSE Linux Enterprise Server 15 SP6-LTSS | python312-core | 3.12.14-150600.3.68.1 |
| SUSE Linux Enterprise Server 16.0 | MozillaFirefox | 153.5.0-160000.1.1 |
| SUSE Linux Enterprise Server 16.0 | expat | 2.8.4-160000.1.1 |
| SUSE Linux Enterprise Server LTSS Extended Security 12 SP5 | MozillaFirefox | 153.5.0-118.16.2 |
| SUSE Linux Enterprise Server LTSS Extended Security 12 SP5 | expat | 2.8.5-21.55.1 |
| SUSE Linux Enterprise Server for SAP Applications 15 SP4 | MozillaFirefox | 153.5.0-150400.157.16.1 |
| SUSE Linux Enterprise Server for SAP Applications 15 SP4 | expat | 2.8.5-150400.3.40.1 |
| SUSE Linux Enterprise Server for SAP Applications 15 SP5 | MozillaFirefox | 153.5.0-150400.157.16.1 |
| SUSE Linux Enterprise Server for SAP Applications 15 SP5 | expat | 2.8.5-150400.3.40.1 |
| SUSE Linux Enterprise Server for SAP Applications 15 SP6 | MozillaFirefox | 153.5.0-150400.157.16.1 |
| SUSE Linux Enterprise Server for SAP Applications 15 SP6 | expat | 2.8.5-150400.3.40.1 |
| SUSE Linux Enterprise Server for SAP Applications 15 SP6 | python312 | 3.12.14-150600.3.68.1 |
| SUSE Linux Enterprise Server for SAP Applications 15 SP6 | python312-core | 3.12.14-150600.3.68.1 |
| SUSE Linux Enterprise Server for SAP applications 16.0 | MozillaFirefox | 153.5.0-160000.1.1 |
| SUSE Linux Enterprise Server for SAP applications 16.0 | expat | 2.8.4-160000.1.1 |
| SUSE Linux Enterprise Workstation Extension 15 SP7 | MozillaThunderbird | 153.5.0-150400.13.9.1 |
| SUSE Linux Micro 6.1 | python311 | 3.11.16-slfo.1.1_1.1 |
| SUSE Linux Micro 6.1 | python311-core | 3.11.16-slfo.1.1_1.1 |
| SUSE Linux Micro 6.2 | expat | 2.8.4-160000.1.1 |
| Ubuntu 16.04 LTS | cadaver | no fix |
| Ubuntu 16.04 LTS | gdcm | no fix |
| Ubuntu 16.04 LTS | insighttoolkit4 | no fix |
| Ubuntu 16.04 LTS | matanza | no fix |
| Ubuntu 16.04 LTS | smart | no fix |
| Ubuntu 16.04 LTS | tdom | no fix |
| Ubuntu 16.04 LTS | wbxml2 | no fix |
| Ubuntu 18.04 LTS | cadaver | no fix |
| Ubuntu 18.04 LTS | gdcm | no fix |
| Ubuntu 18.04 LTS | insighttoolkit4 | no fix |
| Ubuntu 18.04 LTS | matanza | no fix |
| Ubuntu 18.04 LTS | smart | no fix |
| Ubuntu 18.04 LTS | tdom | no fix |
| Ubuntu 18.04 LTS | vnc4 | no fix |
| Ubuntu 18.04 LTS | wbxml2 | no fix |
| Ubuntu 20.04 LTS | cadaver | no fix |
| Ubuntu 20.04 LTS | insighttoolkit4 | no fix |
| Ubuntu 20.04 LTS | matanza | no fix |
| Ubuntu 20.04 LTS | tdom | no fix |
| Ubuntu 20.04 LTS | wbxml2 | no fix |
| Ubuntu 22.04 LTS | cadaver | no fix |
| Ubuntu 22.04 LTS | expat | 2.4.7-1ubuntu0.8 |
| Ubuntu 22.04 LTS | expat | no fix |
| Ubuntu 22.04 LTS | insighttoolkit4 | no fix |
| Ubuntu 22.04 LTS | libxmltok | no fix |
| Ubuntu 22.04 LTS | matanza | no fix |
| Ubuntu 22.04 LTS | tdom | no fix |
| Ubuntu 22.04 LTS | wbxml2 | no fix |
| Ubuntu 24.04 LTS | cadaver | no fix |
| Ubuntu 24.04 LTS | expat | 2.6.1-2ubuntu0.5 |
| Ubuntu 24.04 LTS | libxmltok | no fix |
| Ubuntu 24.04 LTS | matanza | no fix |
| Ubuntu 24.04 LTS | tdom | no fix |
| Ubuntu 24.04 LTS | wbxml2 | no fix |
| Ubuntu 25.10 | cadaver | no fix |
| Ubuntu 25.10 | expat | no fix |
| Ubuntu 25.10 | matanza | no fix |
| Ubuntu 25.10 | swish-e | no fix |
| Ubuntu 25.10 | tdom | no fix |
| Ubuntu 25.10 | wbxml2 | no fix |
| Ubuntu 25.10 | xmlrpc-c | no fix |
| Ubuntu 26.04 LTS | cadaver | no fix |
| Ubuntu 26.04 LTS | expat | 2.7.4-1ubuntu0.1 |
| Ubuntu 26.04 LTS | matanza | no fix |
| Ubuntu 26.04 LTS | tdom | no fix |
| Ubuntu 26.04 LTS | wbxml2 | no fix |
| Ubuntu 26.04 LTS | xmlrpc-c | no fix |
| Ubuntu 26.10 | cadaver | no fix |
| Ubuntu 26.10 | matanza | no fix |
| Ubuntu 26.10 | swish-e | no fix |
| Ubuntu 26.10 | tdom | no fix |
| Ubuntu 26.10 | wbxml2 | no fix |
| Ubuntu 26.10 | xmlrpc-c | no fix |
| Ubuntu Pro 14.04 LTS | coin3 | no fix |
| Ubuntu Pro 14.04 LTS | expat | 2.1.0-4ubuntu1.4+esm12 |
| Ubuntu Pro 14.04 LTS | expat | no fix |
| Ubuntu Pro 14.04 LTS | vnc4 | no fix |
| Ubuntu Pro 14.04 LTS | vtk | no fix |
| Ubuntu Pro 14.04 LTS | xmlrpc-c | no fix |
| Ubuntu Pro 16.04 LTS | ayttm | no fix |
| Ubuntu Pro 16.04 LTS | cableswig | no fix |
| Ubuntu Pro 16.04 LTS | coin3 | no fix |
| Ubuntu Pro 16.04 LTS | expat | no fix |
| Ubuntu Pro 16.04 LTS | expat | 2.1.0-7ubuntu0.16.04.5+esm13 |
| Ubuntu Pro 16.04 LTS | libxmltok | no fix |
| Ubuntu Pro 16.04 LTS | swish-e | no fix |
| Ubuntu Pro 16.04 LTS | vnc4 | no fix |
| Ubuntu Pro 16.04 LTS | vtk | no fix |
| Ubuntu Pro 16.04 LTS | xmlrpc-c | no fix |
| Ubuntu Pro 18.04 LTS | coin3 | no fix |
| Ubuntu Pro 18.04 LTS | expat | no fix |
| Ubuntu Pro 18.04 LTS | expat | 2.2.5-3ubuntu0.9+esm4 |
| Ubuntu Pro 18.04 LTS | libxmltok | no fix |
| Ubuntu Pro 18.04 LTS | swish-e | no fix |
| Ubuntu Pro 18.04 LTS | xmlrpc-c | no fix |
| Ubuntu Pro 20.04 LTS | expat | 2.2.9-1ubuntu0.8+esm2 |
| Ubuntu Pro 20.04 LTS | expat | no fix |
| Ubuntu Pro 20.04 LTS | libxmltok | no fix |
| Ubuntu Pro 20.04 LTS | swish-e | no fix |
| Ubuntu Pro 20.04 LTS | xmlrpc-c | no fix |
| Ubuntu Pro 22.04 LTS | swish-e | no fix |
| Ubuntu Pro 22.04 LTS | xmlrpc-c | no fix |
| Ubuntu Pro 24.04 LTS | swish-e | no fix |
| Ubuntu Pro 24.04 LTS | xmlrpc-c | no fix |
| Ubuntu Pro 26.04 LTS | swish-e | no fix |
| Wolfi | expat | 2.8.1-r0 |
| openSUSE Leap 16.0 | MozillaFirefox | 153.5.0-160000.1.1 |
| openSUSE Leap 16.0 | expat | 2.8.4-160000.1.1 |
| openSUSE Tumbleweed | expat | 2.8.1-1.1 |
| openSUSE Tumbleweed | python310 | 3.10.21-1.1 |
| openSUSE Tumbleweed | python311 | 3.11.16-1.1 |