Algorithmic Complexity The advisory has been revoked - it doesn't affect any version of package libexpat-2.dll (opens in a new tab)
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-RHEL9-LIBEXPAT2DLL-16775449
- published20 May 2026
- disclosed10 May 2026
Introduced: 10 May 2026
CVE-2026-45186 (opens in a new tab)Amendment
The Red Hat security team deemed this advisory irrelevant for RHEL:9.
NVD Description
Note: Versions mentioned in the description apply only to the upstream libexpat-2.dll package and not the libexpat-2.dll package as distributed by RHEL.
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.
References
- https://access.redhat.com/security/cve/CVE-2026-45186
- https://github.com/libexpat/libexpat/pull/1216
- http://www.openwall.com/lists/oss-security/2026/05/11/16
- https://access.redhat.com/errata/RHSA-2026:22715
- https://access.redhat.com/errata/RHSA-2026:22721
- https://access.redhat.com/errata/RHSA-2026:23230
- https://access.redhat.com/errata/RHSA-2026:26319
- https://access.redhat.com/errata/RHSA-2026:27201
- https://access.redhat.com/errata/RHSA-2026:29197
- https://bugzilla.redhat.com/show_bug.cgi?id=2468575
- https://cert-portal.siemens.com/productcert/html/ssa-082556.html
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-45186.json
- https://access.redhat.com/errata/RHSA-2026:58981