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.
CVSS Details
- CVSS 3.1 Base Score: 7.5
- CVSS 3.1 Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H)
Covered by Rapid7
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Alma_linux | — | Upgrade expat-develUpgrade expat | Jun 3, 2026 | Jun 3, 2026 |
| Alpine Linux | — | Upgrade expat | Jun 18, 2026 | May 10, 2026 |
| Amazon Linux Ami 2 | — | Upgrade thunderbirdUpgrade firefox | Jun 8, 2026 | Jun 8, 2026 |
| Amazon_linux_2023 | — | Upgrade firefox-debugsourceUpgrade firefox-debuginfoUpgrade firefox | May 28, 2026 | May 10, 2026 |
| Debian | — | Upgrade expat | Aug 2, 2026 | Aug 2, 2026 |
| Freebsd | — | Upgrade expatUpgrade linux-c7-expatUpgrade linux-rl9-expat | May 13, 2026 | May 11, 2026 |
| Ibm Aix | — | Apply the fix or workaround for python_advisory20 | Jul 15, 2026 | Jul 14, 2026 |
| Ibm Http_server | — | Apply IBM HTTP Server version 9.0.5.29 or laterApply IBM HTTP Server version 8.5.5.30 or laterApply IBM HTTP Server Interim Fix PH71265 | May 28, 2026 | May 26, 2026 |
| Oracle_linux | — | Upgrade expatUpgrade expat-devel | Jun 4, 2026 | May 10, 2026 |
| Redhat_linux | — | Upgrade expat-debuginfoUpgrade expat-develUpgrade expat-debugsourceUpgrade expatNo solution exists | Jun 5, 2026 | May 10, 2026 |
| Rocky_linux | — | Upgrade expatUpgrade expat-develUpgrade expat-debugsourceUpgrade expat-debuginfo | Jun 8, 2026 | Jun 5, 2026 |
| Ubuntu | — | Upgrade libexpat1-devUpgrade libexpat1Upgrade libexpat1-dev (Ubuntu Pro)Upgrade libexpat1 (Ubuntu Pro)Upgrade expatUpgrade expat (Ubuntu Pro)Upgrade lib64expat1 (Ubuntu Pro)Upgrade lib64expat1-dev (Ubuntu Pro) | Sep 22, 2026 | Sep 21, 2026 |
| Vmware Photon_os | — | Use 'tdnf update' to upgrade all packages to the latest version. | May 27, 2026 | May 10, 2026 |
Prioritise with Active Threat Intelligence
With curated Threat Intelligence, you can see which vulnerabilities truly put you at risk, prioritize what matters most, and act before attackers do.
Explore Intelligence Hub