CVE-2026-45186
8Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 2.9epss 0.4%
exploitation probability
0.4%top 64% of all CVEs
observed exploitation
nono source reports it
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:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L
Affected products
libexpat project · libexpatReferences
https://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/security/cve/CVE-2026-45186https://bugzilla.redhat.com/show_bug.cgi?id=2468575https://cert-portal.siemens.com/productcert/html/ssa-082556.htmlhttps://github.com/libexpat/libexpat/pull/1216https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-45186.jsonhttp://www.openwall.com/lists/oss-security/2026/05/11/16