Libxml2: libxml2: denial of service via crafted xml catalogs

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

• ibm aix7.3.2 and later · before 7.3.3.3
• ibm aix7.2.5 and later · before 7.2.5.12
• ibm aix7.3.4
• ibm vios4.1.0 and later · before 4.1.1.30
• ibm vios4.1.2.0
• redhat enterprise linux10.0
• redhat enterprise linux6.0
• redhat enterprise linux7.0
• redhat enterprise linux8.0
• redhat enterprise linux9.0
• redhat hardened imagesall versions
• redhat jboss core servicesall versions
• redhat openshift container platform4.0
• xmlsoft libxml2before 2.15.2

Versions reported by the vendor

Affected version ranges reported by the assigning authority (redhat). Independent of NVD's CPE analysis and usually ahead of it.

• Red Hat Red Hat Enterprise Linux 10

  • all versionsaffected

• Red Hat Red Hat Enterprise Linux 6

  • all versionsaffected

• Red Hat Red Hat Enterprise Linux 7

  • all versionsaffected

• Red Hat Red Hat Enterprise Linux 8

  • all versionsaffected

• Red Hat Red Hat Enterprise Linux 9

  • all versionsaffected

• Red Hat Red Hat Hardened Images

  • 2.15.2-0.3.hum1 and laternot affected · rpm

• Red Hat Red Hat JBoss Core Services

  • all versionsaffected

• Red Hat Red Hat OpenShift Container Platform 4

  • all versionsaffected
  • all versionsaffected

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

Other highest-scoring records for the same primary product.

• CVE-2026-71226Libkcapi: memory corruption via uncanceled aio requests on error in libkcapi's one-shot aio path
  29Monitor
• CVE-2026-71225Libkcapi: iv reuse in libkcapi one-shot symmetric cipher chunking causes cipher state reset across chunk boundaries
  26Monitor
• CVE-2026-13757P11-kit: stack exhaustion via unbounded recursion in rpc attribute parsing
  24Monitor
• CVE-2026-0990Libxml2: libxml2: denial of service via uncontrolled recursion in xml catalog processing
  23Monitor
• CVE-2026-19617Libdm: lvm2: libdm: denial of service via uncontrolled recursion in config parser
  22Monitor
• CVE-2026-19548Binutils: binutils: multiple use-after-free in add_archive_element via lto plugin processing
  22Monitor

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Root cause

Code that parses nested structures sets no depth or size limit. A small input can turn into a disproportionate processing load.

A representative example of this vulnerability class. Not the vendor's source code; it shows the faulty pattern and its fix.

1function expand(node) {2  return node.children.map(expand);3}

1const MAX_DEPTH = 32;2function expand(node, depth = 0) {3  if (depth > MAX_DEPTH) throw new Error("too deep");4  return node.children.map((c) => expand(c, depth + 1));5}

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.