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CVE Record

CVE-2026-74860: Libxml2: double-free/uaf in libxml2 python bindings

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.

HighCVSS 8.5Not KEV-listedUpdated
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Potential ATT&CK relevance

Conservative CVE-to-ATT&CK context

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ATT&CK lookup starting points

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CWE-763: Exact CWE lookup

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Container behavior lookup

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CVE-2026-74860 mapping review

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Vulnerability profileCVE Program record
Severity
High
CVSS
8.5 (3.1)
Known Exploited
No
Published

Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H

Official CVE source material

CNA and ADP enrichment extracted from CVE v5

These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.

1CVSS vectors
5Timeline events
1ADP providers
11Source links

SSVC decision data

CISA-ADPCISA Coordinator
Timestamp
Version
2.0.3
Exploitation: noneAutomatable: noTechnical Impact: total

CVSS vector scores

1 official score

We collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.

ScoreVersionSeverityVectorExploitImpactSource
8.5CVSS 3.1HighCVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H1.86redhat

Vulnerability scoring details

Base CVSS 3.1 score

8.5High
CVSS 3.1 vector shape for CVE-2026-74860Attack VectorAttack ComplexityPrivileges RequiredUser InteractionScopeConfidentiality ImpactIntegrity ImpactAvailability Impact

Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H

Attack Vector
NetworkAdjacentLocalPhysical
Attack Complexity
LowHigh
Privileges Required
NoneLowHigh
User Interaction
NoneRequired
Scope
ChangedUnchanged
Confidentiality Impact
HighLowNone
Integrity Impact
HighLowNone
Availability Impact
HighLowNone

Vulnerability timeline

Timeline events are normalized from CVE metadata, CNA source timelines, ADP timelines, and KEV metadata when present.

  1. Source timelineredhat

    Made public.

  2. CVE reservedCVE Program

    The CVE ID was reserved by the assigning CNA.

  3. Source timelineredhat

    Reported to Red Hat.

  4. CVE publishedCVE Program

    The CVE record was published.

  5. CVE updatedCVE Program

    The CVE record metadata indicates this as the latest update time.

ADP provider summaries

CISA-ADPCISA ADP Vulnrichment
other:ssvc

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
Red HatRed Hat Enterprise Linux 10libxml2, 0:2.12.5-10.el10_2.4affected
Red HatRed Hat Enterprise Linux 8libxml2, 0:2.9.7-21.el8_10.9affected
Red HatRed Hat Enterprise Linux 8libxml2, 0:2.9.7-21.el8_10.9affected
Red HatRed Hat Enterprise Linux 9libxml2, 0:2.9.13-14.el9_8.5affected
Red HatRed Hat Enterprise Linux 9libxml2, 0:2.9.13-14.el9_8.5affected
Red HatCert Manager support for Red Hat OpenShift release 1.20cert-manager/jetstack-cert-manager-rhel9, 1790589912affected
Red HatCert Manager support for Red Hat OpenShift release 1.20cert-manager/cert-manager-istio-csr-rhel9, 1790589914affected
Red HatCert Manager support for Red Hat OpenShift release 1.20cert-manager/cert-manager-operator-rhel9, 1790589855affected
Red HatRed Hat Cost Management On-Premise 1costmanagement/costmanagement-ui-rhel10, 1791460851affected
Red HatRed Hat Hardened Imageslibxml2-main, 2.15.4-0.1.hum1affected
Red HatRed Hat Enterprise Linux 10podmanunaffected
Red HatRed Hat Enterprise Linux 6libxml2unknown
Red HatRed Hat Enterprise Linux 7libxml2affected
Red HatRed Hat Enterprise Linux 8container-tools:rhel8/podmanunaffected
Red HatRed Hat Enterprise Linux 9podmanunaffected
Red HatRed Hat Hardened Imagesswift-langunaffected
Red HatRed Hat OpenShift Container Platform 4openshift/ose-rhel-coreos-8unaffected
Red HatRed Hat OpenShift Container Platform 4openshift/ose-rhel-coreos-9unaffected
Red HatRed Hat OpenShift Container Platform 4podmanunaffected
Weakness

CWE details

CWE-763

CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.

CWE-763 · source CWE mapping

Release of Invalid Pointer or Reference

Release of Invalid Pointer or Reference represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.

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