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TI-2026-05898 Aliases CVE-2026-6732GHSA-6rf6-xrp6-223m

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

Priority LOW 34CWE-843Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
Denial of service
Confidentiality · integrity · availability
None · None · High
Fix status
Partial Red Hat: 1 fixed, 1 without a fix

Attack profile from CVSS 3.1 · NVD. Fix status from CNA and Red Hat. Impact type from CWE-843 and the CVSS impact.

Summary

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00632 50th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix Partial Red Hat: 1 advisoryRed Hat: 1 fixed, 1 without a fix

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
Red HatRed Hat Hardened Images—2.15.3-0.1.hum1Patch availableCNA
Red HatRed Hat Enterprise Linux 10——Not affectedCNA
Red HatRed Hat Enterprise Linux 6——Not affectedCNA
Red HatRed Hat Enterprise Linux 7——Not affectedCNA
Red HatRed Hat Enterprise Linux 8——Not affectedCNA
Red HatRed Hat Enterprise Linux 9——Not affectedCNA
Red HatRed Hat JBoss Core Services——No fix listedCNA
Red HatRed Hat OpenShift Container Platform 4——Not affectedCNA
Red HatRed Hat OpenShift Container Platform 4——Not affectedCNA
  • Red Hat Hardened Images VendorRed Hat Affected — Fixed in 2.15.3-0.1.hum1 Patch available CNA
  • Red Hat Enterprise Linux 10 VendorRed Hat Affected — Fixed in — Not affected CNA
  • Red Hat Enterprise Linux 6 VendorRed Hat Affected — Fixed in — Not affected CNA
  • Red Hat Enterprise Linux 7 VendorRed Hat Affected — Fixed in — Not affected CNA
  • Red Hat Enterprise Linux 8 VendorRed Hat Affected — Fixed in — Not affected CNA
  • Red Hat Enterprise Linux 9 VendorRed Hat Affected — Fixed in — Not affected CNA
  • Red Hat JBoss Core Services VendorRed Hat Affected — Fixed in — No fix listed CNA
  • Red Hat OpenShift Container Platform 4 VendorRed Hat Affected — Fixed in — Not affected CNA
  • Red Hat OpenShift Container Platform 4 VendorRed Hat Affected — Fixed in — Not affected CNA

CPE configurations NVD · 13

CPEVersionsRoleVendor
cpe:2.3:a:xmlsoft:libxml2:*:*:*:*:*:*:*:*2.13.0 to before 2.15.3Vulnerablexmlsoft
cpe:2.3:a:redhat:hardened_images:-:*:*:*:*:*:*:*not specified by NVDVulnerableRed Hat
cpe:2.3:a:redhat:jboss_core_services:-:*:*:*:*:*:*:*not specified by NVDVulnerableRed Hat
cpe:2.3:a:redhat:openshift_container_platform:4.0:*:*:*:*:*:*:*4.0VulnerableRed Hat
cpe:2.3:o:redhat:enterprise_linux:6.0:*:*:*:*:*:*:*6.0VulnerableRed Hat
cpe:2.3:o:redhat:enterprise_linux:7.0:*:*:*:*:*:*:*7.0VulnerableRed Hat
cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:*:*:*:*8.0VulnerableRed Hat
cpe:2.3:o:redhat:enterprise_linux:9.0:*:*:*:*:*:*:*9.0VulnerableRed Hat
cpe:2.3:o:redhat:enterprise_linux:10.0:*:*:*:*:*:*:*10.0VulnerableRed Hat
cpe:2.3:a:ibm:vios:*:*:*:*:*:*:*:*4.1.0 to before 4.1.1.30VulnerableIBM
  • cpe:2.3:a:xmlsoft:libxml2:*:*:*:*:*:*:*:* Versions 2.13.0 to before 2.15.3 Vulnerable ·xmlsoft
  • cpe:2.3:a:redhat:hardened_images:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·Red Hat
  • cpe:2.3:a:redhat:jboss_core_services:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·Red Hat
  • cpe:2.3:a:redhat:openshift_container_platform:4.0:*:*:*:*:*:*:* Versions 4.0 Vulnerable ·Red Hat
  • cpe:2.3:o:redhat:enterprise_linux:6.0:*:*:*:*:*:*:* Versions 6.0 Vulnerable ·Red Hat
  • cpe:2.3:o:redhat:enterprise_linux:7.0:*:*:*:*:*:*:* Versions 7.0 Vulnerable ·Red Hat
  • cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:*:*:*:* Versions 8.0 Vulnerable ·Red Hat
  • cpe:2.3:o:redhat:enterprise_linux:9.0:*:*:*:*:*:*:* Versions 9.0 Vulnerable ·Red Hat
  • cpe:2.3:o:redhat:enterprise_linux:10.0:*:*:*:*:*:*:* Versions 10.0 Vulnerable ·Red Hat
  • cpe:2.3:a:ibm:vios:*:*:*:*:*:*:*:* Versions 4.1.0 to before 4.1.1.30 Vulnerable ·IBM
Show 3 more CPE
CPEVersionsRoleVendor
cpe:2.3:a:ibm:vios:4.1.2.0:*:*:*:*:*:*:*4.1.2.0VulnerableIBM
cpe:2.3:o:ibm:aix:*:*:*:*:*:*:*:*7.2.5 to before 7.2.5.12; 7.3.2 to before 7.3.3.3VulnerableIBM
cpe:2.3:o:ibm:aix:7.3.4:*:*:*:*:*:*:*7.3.4VulnerableIBM
  • cpe:2.3:a:ibm:vios:4.1.2.0:*:*:*:*:*:*:* Versions 4.1.2.0 Vulnerable ·IBM
  • cpe:2.3:o:ibm:aix:*:*:*:*:*:*:*:* Versions 7.2.5 to before 7.2.5.12; 7.3.2 to before 7.3.3.3 Vulnerable ·IBM
  • cpe:2.3:o:ibm:aix:7.3.4:*:*:*:*:*:*:* Versions 7.3.4 Vulnerable ·IBM

Remediation

Red Hat 1 advisory

  • RHSA-2026:11503 Released 2026-04-29 · Red Hat rating Important
    Red Hat Hardened Images RPMs bug fix and enhancement update
    • Red Hat Hardened Images libxml2-16-2.15.3-0.1.hum1@aarch64, libxml2-16-2.15.3-0.1.hum1@x86_64, libxml2-2.15.3-0.1.hum1@aarch64 +8

Vendor assessments

Red Hat

Red Hat rating: Moderate. Red Hat's page for this CVE →

ProductStatusPlan or fix
Red Hat JBoss Core ServicesAffectedNo fix yet: Fix deferred
Red Hat Hardened ImagesFixed RHSA-2026:11503
Not affected: 6 products
  • Red Hat Enterprise Linux 10
  • Red Hat Enterprise Linux 6
  • Red Hat Enterprise Linux 7
  • Red Hat Enterprise Linux 8
  • Red Hat Enterprise Linux 9
  • Red Hat OpenShift Container Platform 4

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-6732
  2. 2026-10-03 Alias added: GHSA-6rf6-xrp6-223m
  3. 2026-10-21 EPSS moved to the below the 50th percentile
  4. 2026-10-26 EPSS moved to the 50th–90th percentile

References

Exploit 1

Advisory 4

  • TI-2019-08259 Underflow in PHP-FPM can lead to RCE KEVCVSS 3.1CRITICAL 9.8
  • TI-2018-10530 Code injection in [UNKNOWN] RichFaces KEVCVSS 3.1CRITICAL 9.8
  • TI-2014-05975 GNU Bash through 4.3 bash43-025 processes trailing strings after certain malformed… KEVCVSS 3.1CRITICAL 9.8
  • TI-2014-05157 GNU Bash through 4.3 processes trailing strings after function definitions in the values… KEVCVSS 3.1CRITICAL 9.8
  • TI-2025-23530 Sudo before 1.9.17p1 allows local users to obtain root access because /etc/nsswitch.conf… KEVCVSS 3.1CRITICAL 9.3
  • TI-2021-17490 mod_proxy SSRF KEVCVSS 3.1CRITICAL 9.0
See all 1955 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences