CVE-2026-45186

HighCVSS 7.5/10Last modified Nov 10, 2026

Description

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.

Metrics

CVSS 3.1 7.5/10CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Weakness enumeration

CWE-407

Affected software

VendorProductVersions
libexpat projectlibexpat< 2.8.1
Red HatRed Hat Enterprise Linux 10—
Red HatRed Hat Enterprise Linux 8—
Red HatRed Hat Enterprise Linux 9—
Red HatRed Hat JBoss Core Services 2.4.62.SP4—
Red HatRed Hat Discovery 2—
Red HatRed Hat Discovery 2—
Red HatRed Hat Update Infrastructure 5—
Red HatRed Hat Update Infrastructure 5—
Red HatRed Hat Update Infrastructure 5—
Red HatRed Hat Update Infrastructure 5—
Red HatRed Hat Update Infrastructure 5—
Red HatRed Hat Update Infrastructure 5—
Red HatRed Hat Update Infrastructure 5—
Red HatRed Hat Enterprise Linux 10—
Red HatRed Hat Enterprise Linux 10—
Red HatRed Hat Enterprise Linux 6—
Red HatRed Hat Enterprise Linux 6—
Red HatRed Hat Enterprise Linux 7—
Red HatRed Hat Enterprise Linux 7—
Red HatRed Hat Enterprise Linux 8—
Red HatRed Hat Enterprise Linux 8—
Red HatRed Hat Enterprise Linux 8—
Red HatRed Hat Enterprise Linux 9—
Red HatRed Hat Enterprise Linux 9—
SiemensSIMATIC S7-1500 CPU 1518-4 PN/DP MFP>= V3.1.5, < V3.1.6
SiemensSIMATIC S7-1500 CPU 1518-4 PN/DP MFP>= V3.1.5, < V3.1.6
SiemensSIMATIC S7-1500 CPU 1518F-4 PN/DP MFP>= V3.1.5, < V3.1.6
SiemensSIMATIC S7-1500 CPU 1518F-4 PN/DP MFP>= V3.1.5, < V3.1.6
SiemensSIPLUS S7-1500 CPU 1518-4 PN/DP MFP>= V3.1.5, < V3.1.6

References

Timeline

Published
May 10, 2026
Last modified
Nov 10, 2026
NVD status
Modified

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CVE-2026-45186: High severity, CVSS 7.5 | Vulnix