CVE-2026-45186CWE-407

CVE-2026-45186

Low · published May 10, 2026

CVSS v3.1
2.9
EPSS
0%
Percentile
40.4
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
2.9 · LOW
Vector
CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L
CVSS v4.0
Not supplied
EPSS
0.00479 · 40.4th percentile
Weakness
CWE-407 · Inefficient Algorithmic Complexity
Published
2026-05-10T11:16Z
Affected products (1)
ProductVersionsFixed in
libexpat_project/libexpat< 2.8.12.8.1
References (13)
https://github.com/libexpat/libexpat/pull/1216 · [email protected]http://www.openwall.com/lists/oss-security/2026/05/11/16 · af854a3a-2127-422b-91ae-364da2661108https://access.redhat.com/errata/RHSA-2026:22715 · 0b0ca135-0b70-47e7-9f44-1890c2a1c46chttps://access.redhat.com/errata/RHSA-2026:22721 · 0b0ca135-0b70-47e7-9f44-1890c2a1c46chttps://access.redhat.com/errata/RHSA-2026:23230 · 0b0ca135-0b70-47e7-9f44-1890c2a1c46chttps://access.redhat.com/errata/RHSA-2026:26319 · 0b0ca135-0b70-47e7-9f44-1890c2a1c46chttps://access.redhat.com/errata/RHSA-2026:27201 · 0b0ca135-0b70-47e7-9f44-1890c2a1c46chttps://access.redhat.com/errata/RHSA-2026:29197 · 0b0ca135-0b70-47e7-9f44-1890c2a1c46chttps://access.redhat.com/errata/RHSA-2026:58981 · 0b0ca135-0b70-47e7-9f44-1890c2a1c46chttps://access.redhat.com/security/cve/CVE-2026-45186 · 0b0ca135-0b70-47e7-9f44-1890c2a1c46chttps://bugzilla.redhat.com/show_bug.cgi?id=2468575 · 0b0ca135-0b70-47e7-9f44-1890c2a1c46chttps://cert-portal.siemens.com/productcert/html/ssa-082556.html · 0b142b55-0307-4c5a-b3c9-f314f3fb7c5ehttps://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-45186.json · 0b0ca135-0b70-47e7-9f44-1890c2a1c46c
EPSS history
Timeline
  • 10 MAY 06:36Z
    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
    cvelistv5