Libxml2: double-free/uaf in libxml2 python bindings
Historical advisory recorded 29 Oct 2026 15:12:12 UTC. Read the latest advisory.
cve-program · CVE-2026-74860
PublishedA 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.
Read the publisher's advisoryAffected versions, risk and source history
Related advisories and sources
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CVE-2026-74860 · CVE overview and exploitation status
cve-program · CVE-2026-74860
- https://access.redhat.com/errata/RHSA-2026:64463
- https://access.redhat.com/errata/RHSA-2026:71585
- https://access.redhat.com/errata/RHSA-2026:71586
- https://access.redhat.com/errata/RHSA-2026:71641
- https://access.redhat.com/errata/RHSA-2026:72470
- https://access.redhat.com/errata/RHSA-2026:72475
- https://access.redhat.com/errata/RHSA-2026:72476
- https://access.redhat.com/errata/RHSA-2026:79357
- https://access.redhat.com/errata/RHSA-2026:82939
- https://access.redhat.com/errata/RHSA-2026:89750
- https://access.redhat.com/errata/RHSA-2026:89759
- https://access.redhat.com/errata/RHSA-2026:90309
- https://access.redhat.com/errata/RHSA-2026:92352
- https://access.redhat.com/security/cve/CVE-2026-74860
- https://bugzilla.redhat.com/show_bug.cgi?id=2529697
This historical advisory does not include today's related changes. Open the latest advisory to find current connections.