CVE-2026-45186

LOW

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 v3.1 Score

2.9
LOW
CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L
Attack Vector
LOCAL
Complexity
HIGH
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
LOW
Published: 5/10/2026Modified: 9/16/2026

Related Intelligence (2)

CRITICALAi

Patch Tuesday - May 2026

Microsoft is publishing 137 vulnerabilities on May 2026 Patch Tuesday . Microsoft is not aware of exploitation in the wild or public disclosure for any of these vulnerabilities. So far this month, Microsoft has provided patches to address 133 browser vulnerabilities, which are not included in the Patch Tuesday count above. Windows Netlogon: critical RCE Anyone responsible for securing a domain con

CVE-2026-41089CVE-2020-1472
Rapid7
HIGHVulnerability

NVD HIGH: CVE-2026-45186 — In libexpat before 2.8.1, the computational complexity of attribute name collisi...

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
NIST NVD

References (13)

https://github.com/libexpat/libexpat/pull/1216ExploitIssue Trackinghttp://www.openwall.com/lists/oss-security/2026/05/11/16Mailing ListThird Party Advisoryhttps://access.redhat.com/errata/RHSA-2026:22715https://access.redhat.com/errata/RHSA-2026:22721https://access.redhat.com/errata/RHSA-2026:23230https://access.redhat.com/errata/RHSA-2026:26319https://access.redhat.com/errata/RHSA-2026:27201https://access.redhat.com/errata/RHSA-2026:29197https://access.redhat.com/errata/RHSA-2026:58981https://access.redhat.com/security/cve/CVE-2026-45186https://bugzilla.redhat.com/show_bug.cgi?id=2468575https://cert-portal.siemens.com/productcert/html/ssa-082556.htmlhttps://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-45186.json