What’s Vulnerable › Vulnerabilities

CVE-2025-59375

• Severity: high (CVSS 7.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.4% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2025-09-15 · updated 2026-10-19
• Weakness: CWE-770

Description

libexpat in Expat before 2.7.2 allows attackers to trigger large dynamic memory allocations via a small document that is submitted for parsing.

Affected products

• libexpat project libexpat: before 2.7.2 — fixed in 2.7.2

How to fix

Upgrade to a fixed version: libexpat project libexpat 2.7.2. Check the vendor advisory for mitigations.

References

• https://github.com/libexpat/libexpat/blob/676a4c531ec768732fac215da9730b5f50fbd2bf/expat/Changes#L45-L74
• https://github.com/libexpat/libexpat/blob/R_2_7_2/expat/Changes
• https://github.com/libexpat/libexpat/issues/1018
• https://github.com/libexpat/libexpat/pull/1034
• https://issues.oss-fuzz.com/issues/439133977
• http://www.openwall.com/lists/oss-security/2025/09/16/2
• http://www.openwall.com/lists/oss-security/2026/05/01/5
• https://cert-portal.siemens.com/productcert/html/ssa-082556.html
• https://cert-portal.siemens.com/productcert/html/ssa-089022.html

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