CVE-2026-74860
A flaw was found in libxml2 with Python bindings enabled.
Published Sep 8, 2026 · updated Oct 14, 2026
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.
Timeline
Detection, updates, and resolution for this record.
Sep 8, 2026 · NIST NVD
Detected
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 re
Oct 14, 2026 · NIST NVD
Updated
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 re
Sources
- CVE.orgCVE-2026-74860
Official CVE identifier
cve.org - FIRST EPSSCVE-2026-74860
30-day exploitation probability 0.4%
first.org - NIST NVDCVE-2026-74860
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 at
nvd.nist.gov