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CVE-2026-6732

Libxml2: libxml2: denial of service via crafted xsd-validated document

No known exploitation. EPSS puts it in the 51st percentile. Fixed versions are out.

CVSS 3.16.5MediumEPSS percentile51st0.6% chance in 30 daysCISA KEVNot listedNo confirmed exploitation
No public exploit knownFix4 products4 fixed builds listed below
Check it yourself

OpenVAS · 5 checks

e.g. OID 1.3.6.1.4.1.25623.1.0.158145

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Published Updated Sources: CVE.org, NVD, CSAF

NVD CVE.org

What to do

Find your product and version, then upgrade to the build on the right.

  • Red Hat Hardened ImagesFixed builds2.15.3-0.1.hum1Stated by: CVE record
  • Xmlsoft Libxml2Affected: ≥ 2.13.0, < 2.15.3Upgrade to: 2.15.3Stated by: NVD
  • Ibm ViosAffected: ≥ 4.1.0, < 4.1.1.30Upgrade to: 4.1.1.30Stated by: NVD
  • Ibm AixAffected: ≥ 7.2.5, < 7.2.5.12Upgrade to: 7.2.5.12Stated by: NVD

Versions as the sources state them. Full version matrix after sign-in

Check it yourselfA free OpenVAS check exists for this CVE. Run it against your hosts.Is your organisation exposed?Request an assessment to establish which checks fit your systems.

What it is

From the CVE record

A flaw was found in libxml2. This vulnerability occurs when the library processes a specially crafted XML Schema Definition (XSD) validated document that includes an internal entity reference. An attacker could exploit this by providing a malicious document, leading to a type confusion error that causes the application to crash. This results in a denial of service (DoS), making the affected system or application unavailable.

In plain language

No plain-language summary for this CVE yet.

Exploitation

Where each signal puts this CVE on the scale from published to confirmed exploited.

EPSS51st
CISA KEV

Not in the catalog. CISA has not confirmed exploitation.

Public exploits

No public exploit or proof of concept found in the sources we track.

EPSS

0.6% chance of exploitation activity in the next 30 days, which ranks it in the 51st percentile of scored CVEs.

Exploit Prediction Scoring System, FIRST.org. A probability, not a confirmation.

Lifecycle

13 events over 196 days, from the signal feeds we watch.

  1. Patch availablerecord updated
  2. Patch availablerecord updated
  3. Patch availablerecord updated
  4. Record updated
  5. Record updated
  6. Record updated

Affected products

And 5 more affected products. See all after sign-in

Technical detail

CVSS 3.1 vector

Open in the CVSS calculator

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

Scored 6.5 by NVD.

How it is reached

  • Attack Vector AdjacentRequires access to the local network (e.g. same Wi-Fi, Bluetooth)
  • Attack Complexity LowNo special conditions — the attack can be reliably reproduced
  • Privileges Required NoneNo authentication required — anyone can exploit this
  • User Interaction NoneNo user interaction needed — fully automated exploitation

Scope

  • Scope UnchangedImpact is limited to the vulnerable component itself

Impact if exploited

  • Confidentiality NoneNo confidentiality impact
  • Integrity NoneNo integrity impact
  • Availability HighTotal denial of service — the component is completely unavailable

Weaknesses

ATT&CK techniques

Mapped from the weaknesses above (CWE to ATT&CK), not observed in attacks.

Sources

References in the record

And 43 more references. See all after sign-in

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