What’s Vulnerable › Vulnerabilities

CVE-2026-41080

• Severity: low (CVSS 2.9 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.4% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-04-16 · updated 2026-07-14
• Weakness: CWE-331

Description

libexpat before 2.8.0 uses insufficient entropy, and thus hash flooding can occur via a crafted XML document.

Affected products

• libexpat project libexpat: before 2.8.0 — fixed in 2.8.0

How to fix

Upgrade to a fixed version: libexpat project libexpat 2.8.0. Check the vendor advisory for mitigations.

References

• https://blog.hartwork.org/posts/expat-2-8-0-released/
• https://github.com/libexpat/libexpat/issues/47
• https://github.com/libexpat/libexpat/pull/1183
• https://www.openwall.com/lists/oss-security/2026/04/26/1
• http://www.openwall.com/lists/oss-security/2026/04/26/1
• https://cert-portal.siemens.com/productcert/html/ssa-082556.html

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