High severity · published Sep 8, 2026
CVE-2026-74860
Libxml2: double-free/uaf in libxml2 python bindings
8.5
CVSS
0.7%
EPSS
No
On KEV
Description
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 vector
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H
Attack vector
Network
Complexity
High
Privileges
Low
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Changed
Exploitation
Is it being used?
Exploit prediction (EPSS)0.7% · higher than 51% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
CM
Cert Manager support for Red Hat OpenShift release 1.20 · Red Hat
All versions, or not specified · source: vendor
RH
Red Hat Cost Management On-Premise 1 · Red Hat
All versions, or not specified · source: vendor
RH
Red Hat Enterprise Linux 10 · Red Hat
All versions, or not specified · source: vendor
RH
Red Hat Enterprise Linux 10.0 Extended Update Support · Red Hat
All versions, or not specified · source: vendor
RH
Red Hat Enterprise Linux 6 · Red Hat
All versions, or not specified · source: vendor
RH
Red Hat Enterprise Linux 7 · Red Hat
All versions, or not specified · source: vendor
RH
Red Hat Enterprise Linux 8 · Red Hat
All versions, or not specified · source: vendor
RH
Red Hat Enterprise Linux 9 · Red Hat
All versions, or not specified · source: vendor
RH
Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions · Red Hat
All versions, or not specified · source: vendor
RH
Red Hat Enterprise Linux 9.6 Extended Update Support · Red Hat
All versions, or not specified · source: vendor
RH
Red Hat Hardened Images · Red Hat
All versions, or not specified · source: vendor
RH
Red Hat Update Infrastructure 5 · Red Hat
All versions, or not specified · source: vendor
Affected product
CM
Cert Manager support for Red Hat OpenShift release 1.20
Red Hat
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-74860
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-74860
vendor-advisory
https://access.redhat.com/errata/RHSA-2026:64463
vendor-advisory
https://access.redhat.com/errata/RHSA-2026:71585
vendor-advisory
https://access.redhat.com/errata/RHSA-2026:71586
vendor-advisory
https://access.redhat.com/errata/RHSA-2026:71641
vendor-advisory
https://access.redhat.com/errata/RHSA-2026:72470
vendor-advisory
https://access.redhat.com/errata/RHSA-2026:72475
More from Cert Manager support for Red Hat OpenShift release 1.20
9.8
CVE-2026-42010
Gnutls: gnutls: authentication bypass via nul character in username
9.8
CVE-2025-14087
Glib: glib: buffer underflow in gvariant parser leads to heap corruption
9.1
CVE-2026-58016
Glib: integer underflow in gio/gdbusintrospection.c via "g_dbus_node_info_new_for_xml"
9.1
CVE-2026-33845
Gnutls: gnutls: denial of service via dtls zero-length fragment
8.6
CVE-2026-58014
Glib: off-by-one error in glib/gkeyfile.c via "g_key_file_get_locale_string_list"