CVE-2026-74860

CVE-2026-74860 · Libxml2: double-free/uaf in libxml2 python bindings

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This page shows selected source facts. See the linked advisories for the complete description and affected versions.

A flaw was found in libxml2 with Python bindings enabled. A remote attacker could exploit this vulnerability by providing a specially crafted XML document containing a Document Type Definition (DTD) with enumerated attribute values. This triggers a double-free error in the SAX attributeDecl callback handler, where a string is freed twice. This flaw can lead to a denial of service (DoS) due to a reproducible crash in Python applications using the libxml2 SAX bindings.

CVSS 8.5 · High · EPSS 0.7% · Fix available

Published

2026-09-08T11:27:45.158Z

Updated

2026-10-29T19:53:12.151Z

Stack: system

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