CVE-2026-74860

Libxml2: double-free/uaf in libxml2 python bindings

HIGH 8.5

En bref

Source: NVD
EPSS: EPSS 0.66 % · centile 51 (2026-10-28)
État: PUBLISHED
Publiée: 2026-09-08 11:27 UTC
Mise à jour: 2026-10-29 13:43 UTC
Attribuée par: redhat
Statut NVD: 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.

Faiblesses (CWE)

CWE-763 — Libération d'un pointeur ou d'une référence invalide

Références

Scores

Version	Score	Vecteur	Évalué par
CVSS 3.1	HIGH 8.5	CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H	redhat
CVSS 3.1	HIGH 8.5	CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H	NVD · secalert@redhat.com (Secondary)

Références européennes

ENISA EUVD · EUVD-2026-72691
GCVE · GCVE-0-2026-74860

Avis du CERT-FR

CERTFR-2026-AVI-1390 — Multiples vulnérabilités dans Tenable Network Monitor · cert.ssi.gouv.fr
CERTFR-2026-AVI-1385 — Multiples vulnérabilités dans les produits VMware · cert.ssi.gouv.fr

Produits affectés

Produit	Versions
Red Hat · Red Hat Enterprise Linux 10	unaffected 0:2.12.5-10.el10_2.4 < *
Red Hat · Red Hat Enterprise Linux 10.0 Extended Update Support	unaffected 0:2.12.5-9.el10_0.9 < *
Red Hat · Red Hat Enterprise Linux 8	unaffected 0:2.9.7-21.el8_10.9 < *
Red Hat · Red Hat Enterprise Linux 8	unaffected 0:2.9.7-21.el8_10.9 < *
Red Hat · Red Hat Enterprise Linux 9	unaffected 0:2.9.13-14.el9_8.5 < *
Red Hat · Red Hat Enterprise Linux 9	unaffected 0:2.9.13-14.el9_8.5 < *
Red Hat · Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions	unaffected 0:2.9.13-3.el9_2.20 < *
Red Hat · Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions	unaffected 0:2.9.13-13.el9_4.10 < *
Red Hat · Red Hat Enterprise Linux 9.6 Extended Update Support	unaffected 0:2.9.13-13.el9_6 < *
Red Hat · Cert Manager support for Red Hat OpenShift release 1.20	unaffected 1790589912 < *
Red Hat · Cert Manager support for Red Hat OpenShift release 1.20	unaffected 1790589914 < *
Red Hat · Cert Manager support for Red Hat OpenShift release 1.20	unaffected 1790589855 < *
Red Hat · Red Hat Cost Management On-Premise 1	unaffected 1791460851 < *
Red Hat · Red Hat Hardened Images	unaffected 2.15.4-0.1.hum1 < *
Red Hat · Red Hat Update Infrastructure 5	unaffected 1791978534 < *
Red Hat · Red Hat Update Infrastructure 5	unaffected 1791978528 < *
Red Hat · Red Hat Update Infrastructure 5	unaffected 1791978528 < *
Red Hat · Red Hat Update Infrastructure 5	unaffected 1791964013 < *
Red Hat · Red Hat Update Infrastructure 5	unaffected 1791978693 < *
Red Hat · Red Hat Enterprise Linux 10

Sources

Source	Licence
CVE List (CVEProject cvelistV5)	CVE Program Terms of Use
EPSS (FIRST.org)	FIRST — attribution requested
ENISA EUVD	ENISA — reproduction authorised, source acknowledged
CERT-FR (ANSSI)	Licence Ouverte / Etalab 2.0
NVD (NIST) via fkie-cad/nvd-json-data-feeds	Public domain — this product uses data from the NVD API but is not endorsed or certified by the NVD