Reference page — cumulative record through Monday, October 19, 2026 UTC. Reference pages update as the archive grows; only dated daily editions are immutable pages of record.

CVE-2026-74860

CVE-2026-74860HIGH

Red Hat Red Hat Enterprise Linux 10 — Libxml2: double-free/uaf in libxml2 python bindings

  AV  AC  PR  UI  S  C  I  A   CVSS    EPSS   %ile   KEV
   N   H   L   N  C  H  H  H    8.5   .0045   37.5     —

AFFECTED
  Product                                                  Versions     Fixed
  Red Hat Enterprise Linux 10                              unspecified  0:2.12.5-10.el10_2.4
  Red Hat Enterprise Linux 8                               unspecified  0:2.9.7-21.el8_10.9
  Red Hat Enterprise Linux 8                               unspecified  0:2.9.7-21.el8_10.9
  Red Hat Enterprise Linux 9                               unspecified  0:2.9.13-14.el9_8.5
  Red Hat Enterprise Linux 9                               unspecified  0:2.9.13-14.el9_8.5
  Cert Manager support for Red Hat OpenShift release 1.20  unspecified  1790589912
  Cert Manager support for Red Hat OpenShift release 1.20  unspecified  1790589914
  Cert Manager support for Red Hat OpenShift release 1.20  unspecified  1790589855
  Red Hat Cost Management On-Premise 1                     unspecified  1791460851
  Red Hat Hardened Images                                  unspecified  2.15.4-0.1.hum1
  + 14 more

TIMELINE
  Aug 17  Reserved by redhat
  Sep 8   Published (CNA: redhat)
  Sep 9   PATCH SHIPPED — CVE-2026-74860 (Red Hat Hardened Images). Fixed in Red Hat Hardened Images 2.15.4-0.1.hum1.

CWE-763 · CNA: redhat · CVSS v3.1 · 11 references · NVD status: Awaiting Analysis

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.

Lifecycle

Complete event history — 3 events, chronological
Date	Event	Detail
August 17, 2026	Reserved	Reserved by redhat
September 8, 2026	Published	Published (CNA: redhat)
September 9, 2026	PATCH SHIPPED	PATCH SHIPPED — CVE-2026-74860 (Red Hat Hardened Images). Fixed in Red Hat Hardened Images 2.15.4-0.1.hum1.

Affected

Affected products and packages — 24 rows
Vendor	Product / Package	Ecosystem	Version introduced	Fixed
Red Hat	Red Hat Enterprise Linux 10	—	—	0:2.12.5-10.el10_2.4
Red Hat	Red Hat Enterprise Linux 8	—	—	0:2.9.7-21.el8_10.9
Red Hat	Red Hat Enterprise Linux 8	—	—	0:2.9.7-21.el8_10.9
Red Hat	Red Hat Enterprise Linux 9	—	—	0:2.9.13-14.el9_8.5
Red Hat	Red Hat Enterprise Linux 9	—	—	0:2.9.13-14.el9_8.5
Red Hat	Cert Manager support for Red Hat OpenShift release 1.20	—	—	1790589912
Red Hat	Cert Manager support for Red Hat OpenShift release 1.20	—	—	1790589914
Red Hat	Cert Manager support for Red Hat OpenShift release 1.20	—	—	1790589855
Red Hat	Red Hat Cost Management On-Premise 1	—	—	1791460851
Red Hat	Red Hat Hardened Images	—	—	2.15.4-0.1.hum1
Red Hat	Red Hat Update Infrastructure 5	—	—	1791978534
Red Hat	Red Hat Update Infrastructure 5	—	—	1791978528
Red Hat	Red Hat Update Infrastructure 5	—	—	1791978528
Red Hat	Red Hat Update Infrastructure 5	—	—	1791964013
Red Hat	Red Hat Update Infrastructure 5	—	—	1791978693
Red Hat	Red Hat Enterprise Linux 10	—	—	—
Red Hat	Red Hat Enterprise Linux 6	—	—	—
Red Hat	Red Hat Enterprise Linux 7	—	—	—
Red Hat	Red Hat Enterprise Linux 8	—	—	—
Red Hat	Red Hat Enterprise Linux 9	—	—	—
Red Hat	Red Hat Hardened Images	—	—	—
Red Hat	Red Hat OpenShift Container Platform 4	—	—	—
Red Hat	Red Hat OpenShift Container Platform 4	—	—	—
Red Hat	Red Hat OpenShift Container Platform 4	—	—	—

Weaknesses

CWE-763

References (11)

Authoritative record: CVE-2026-74860 at cve.org

Vendors: red hat

Weaknesses: CWE-763

About this page

This is a reference page, not a dated page of record. It assembles the complete lifecycle of CVE-2026-74860 from the CVE Program record, NVD enrichment, the CISA KEV catalog, EPSS, and OSV advisories. The box score's numbers (CVSS, EPSS, KEV status) are current as of Monday, October 19, 2026 UTC and are re-derived as the archive grows; only dated daily editions are immutable pages of record. The authoritative source for this identifier is cve.org.