CVE-2026-50219
libexpat before 2.8.2 lacks handler call depth tracking for calls to XML_GetBuffer, XML_Parse, XML_ParseBuffer, XML_ParserFree, or XML_ParserReset from within handlers in cases of a policy violation. Thus, a use-after-free can occur,
CVE-2026-50219 is fixed in 11 products on 1 platform, first by RHSA-2026:64810, released June 19, 2026. It is not reported as exploited. Patch Radar priority: Routine.
Routine
CVSS
6.9
Low
Exploitation
None reported
No vendor assessment
CISA KEV
Not listed
Not in the Known Exploited Vulnerabilities catalog
EPSS
0.0018
7th percentile
libexpat before 2.8.2 lacks handler call depth tracking for calls to XML_GetBuffer, XML_Parse, XML_ParseBuffer, XML_ParserFree, or XML_ParserReset from within handlers in cases of a policy violation. Thus, a use-after-free can occur,
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+deb12u3 | DEBIAN-CVE-2026-50219 | Jun 28, 2026 |
| expat · Debian 13.5 (trixie) | 2.8.2-1~deb13u1 | DEBIAN-CVE-2026-50219 | Jun 28, 2026 |
| expat · Debian 14 | 2.8.2-1 | DEBIAN-CVE-2026-50219 | Jun 28, 2026 |
| expat · RHEL 10 | 2.7.3-1.el10_2.3 | RHSA-2026:64810 | Jun 19, 2026 |
| expat · RHEL 8 | 0:2.5.0-2.el8_10.2 | RHSA-2026:64809 | Sep 13, 2026 |
| expat · RHEL 9 | 0:2.5.0-6.el9_8.3 | RHSA-2026:64812 | Sep 13, 2026 |
| expat · Ubuntu 18.04.6 LTS (bionic) | 2.2.5-3ubuntu0.9+esm4 | expat 2.2.5-3ubuntu0.9+esm4 | Jun 21, 2026 |
| expat · Ubuntu 20.04 LTS (focal) | 2.2.9-1ubuntu0.8+esm2 | expat 2.2.9-1ubuntu0.8+esm2 | Jun 21, 2026 |
| expat · Ubuntu 22.04.1 LTS (jammy) | 2.4.7-1ubuntu0.8 | expat 2.4.7-1ubuntu0.8 | Jun 21, 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_2.3 | ALSA-2026:64810 | Sep 8, 2026 |
| expat · almalinux 8 | 2.5.0-2.el8_10.2 | ALSA-2026:64809 | Sep 8, 2026 |
| expat · almalinux 9 | 2.5.0-6.el9_8.3 | ALSA-2026:64812 | Sep 8, 2026 |
| expat · amzn 2023 | 2.8.3-1.amzn2023.0.1 | ALAS2023-2026-2157 | Sep 14, 2026 |
| expat · ol 10 | 0:2.7.3-1.el10_2.3 | ELSA-2026-64810-0 | Sep 8, 2026 |
| expat · ol 8 | 0:2.5.0-2.el8_10.2 | ELSA-2026-64809-0 | Sep 8, 2026 |
| expat · ol 9 | 0:2.5.0-6.el9_8.3 | ELSA-2026-64812-0 | Sep 8, 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_2.3 | RLSA-2026:64810 | Sep 9, 2026 |
| expat · rocky 8 | 0:2.5.0-2.el8_10.2 | RLSA-2026:64809 | Sep 9, 2026 |
| expat · rocky 9 | 0:2.5.0-6.el9_8.3 | RLSA-2026:64812 | Sep 9, 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-debuginfo · amzn 2023 | 2.8.3-1.amzn2023.0.1 | ALAS2023-2026-2157 | Sep 14, 2026 |
| expat-debugsource · amzn 2023 | 2.8.3-1.amzn2023.0.1 | ALAS2023-2026-2157 | Sep 14, 2026 |
| expat-devel · RHEL 8 | 0:2.5.0-2.el8_10.2 | RHSA-2026:64809 | Sep 13, 2026 |
| expat-devel · RHEL 9 | 0:2.5.0-6.el9_8.3 | RHSA-2026:64812 | Sep 13, 2026 |
| expat-devel · almalinux 10 | 2.7.3-1.el10_2.3 | ALSA-2026:64810 | Sep 8, 2026 |
| expat-devel · almalinux 8 | 2.5.0-2.el8_10.2 | ALSA-2026:64809 | Sep 8, 2026 |
| expat-devel · almalinux 9 | 2.5.0-6.el9_8.3 | ALSA-2026:64812 | Sep 8, 2026 |
| expat-devel · amzn 2023 | 2.8.3-1.amzn2023.0.1 | ALAS2023-2026-2157 | Sep 14, 2026 |
| expat-devel · ol 10 | 0:2.7.3-1.el10_2.3 | ELSA-2026-64810-0 | Sep 8, 2026 |
| expat-devel · ol 8 | 0:2.5.0-2.el8_10.2 | ELSA-2026-64809-0 | Sep 8, 2026 |
| expat-devel · ol 9 | 0:2.5.0-6.el9_8.3 | ELSA-2026-64812-0 | Sep 8, 2026 |
| expat-static · amzn 2023 | 2.8.3-1.amzn2023.0.1 | ALAS2023-2026-2157 | Sep 14, 2026 |
| firefox · amzn 2023 | 140.12.0-1.amzn2023.0.1 | ALAS2023-2026-1928 | Jul 6, 2026 |
| firefox-debuginfo · amzn 2023 | 140.12.0-1.amzn2023.0.1 | ALAS2023-2026-1928 | Jul 6, 2026 |
| firefox-debugsource · amzn 2023 | 140.12.0-1.amzn2023.0.1 | ALAS2023-2026-1928 | Jul 6, 2026 |
| libexpat1 · Ubuntu 18.04.6 LTS (bionic) | 2.2.5-3ubuntu0.9+esm4 | libexpat1 2.2.5-3ubuntu0.9+esm4 | Jun 21, 2026 |
| libexpat1 · Ubuntu 20.04 LTS (focal) | 2.2.9-1ubuntu0.8+esm2 | libexpat1 2.2.9-1ubuntu0.8+esm2 | Jun 21, 2026 |
| libexpat1 · Ubuntu 22.04.1 LTS (jammy) | 2.4.7-1ubuntu0.8 | libexpat1 2.4.7-1ubuntu0.8 | Jun 21, 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 |
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