CVE-2026-74860Libxml2: double-free/uaf in libxml2 python bindings
Updated under an hour ago ()
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It affects Red Hat Enterprise Linux 10 and 5 other products. Add what you run to find out whether that includes you.
No exploitation reported and no EPSS estimate yet.
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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 (v3.1, CNA)CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H
- Weakness (CWE)
- CWE-763
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- redhat
- NVD analysis
- Awaiting Analysis
- Record last updated
- Oct 14, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Red Hat Red Hat Enterprise Linux 10 redhat:enterprise_linux | from 0:2.12.5-10.el10_2.4 not affected | CNA record |
Red Hat Cert Manager support for Red Hat OpenShift release 1.20 redhat:cert_manager | from 1790589912 not affected | CNA record |
Red Hat Red Hat Cost Management On-Premise 1 redhat:cost_management_on_premise | from 1791460851 not affected | CNA record |
Red Hat Red Hat Hardened Images redhat:hummingbird | from 2.15.4-0.1.hum1 not affected | CNA record |
Red Hat Red Hat Update Infrastructure 5 redhat:rhui | from 1791978534 not affected | CNA record |
Red Hat Red Hat OpenShift Container Platform 4 redhat:openshift | 4 | CNA record |
References
- https://access.redhat.com/errata/RHSA-2026:64463vendor-advisory, x-refsource-redhat
- https://access.redhat.com/errata/RHSA-2026:71585vendor-advisory, x-refsource-redhat
- https://access.redhat.com/errata/RHSA-2026:71586vendor-advisory, x-refsource-redhat
- https://access.redhat.com/errata/RHSA-2026:71641vendor-advisory, x-refsource-redhat
- https://access.redhat.com/errata/RHSA-2026:72470vendor-advisory, x-refsource-redhat
- https://access.redhat.com/errata/RHSA-2026:72475vendor-advisory, x-refsource-redhat
- https://access.redhat.com/errata/RHSA-2026:72476vendor-advisory, x-refsource-redhat
- https://access.redhat.com/errata/RHSA-2026:79357vendor-advisory, x-refsource-redhat
- https://access.redhat.com/errata/RHSA-2026:82939vendor-advisory, x-refsource-redhat
- https://access.redhat.com/security/cve/CVE-2026-74860vdb-entry, x-refsource-redhat
- https://bugzilla.redhat.com/show_bug.cgi?id=2529697issue-tracking, x-refsource-redhat
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.