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Vulnerabilities

Vulnerability · CVE-2026-91765

cleanup_xml_node() in the SOAP XML parser recurses once per XML nesting level with no depth limit.

Published Sep 25, 2026 · catalog updated Oct 23, 2026 · cleanup_xml_node() in the SOAP

Open the advisory

Exploitation likelihood is not on this record for CVE-2026-91765. A missing EPSS score is not a low risk. Compare cleanup_xml_node() in the SOAP with the linked advisory before you change production.

Gaps on this record

  • The stored product name is a package slug. The name on this page is taken from the title (cleanup_xml_node() in the SOAP).
  • No vendor fix or required action is stored. Compare the linked advisory before you change production.
  • EPSS is missing. A missing score is not a low risk.
Severity
High7.5
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
Not in the current FIRST EPSS dataset
Remediation
Version ranges on file
Affected products
cpe php/php

cleanup_xml_node() in the SOAP XML parser recurses once per XML nesting level with no depth limit. An unauthenticated attacker can post a SOAP request containing tens of thousands of nested elements to any SoapServer endpoint, exhaust the stack and crash the process. The same unbounded recursion exists in the SOAP value decoder and in the WSDL node search helper.

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • cpe php/php< 8.2.34
  • cpe php/php< 8.3.35
  • cpe php/php< 8.4.26
  • cpe php/php< 8.5.11

How to fix CVE-2026-91765

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

Exploitation likelihood is not on this record for CVE-2026-91765. A missing EPSS score is not a low risk. Compare cleanup_xml_node() in the SOAP with the linked advisory before you change production.

Which versions are affected?

Compare what you have installed with < 8.2.34, < 8.3.35, < 8.4.26, < 8.5.11. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

CWE-674. EPSS is absent from the current FIRST dataset. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Code

The project this record applies to. Exploit listings stay in References.

Timeline

Detection, updates, and resolution for this record.

  1. Sep 25, 2026 · NIST NVD

    Detected

    cleanup_xml_node() in the SOAP XML parser recurses once per XML nesting level with no depth limit. An unauthenticated attacker can post a SOAP request containing tens of thousands of nested elements to any SoapServer endpoint, exhaust the stack and crash the process. The same unbounded recursion exists in the SOAP value decoder and in the WSDL node search helper.

  2. Oct 23, 2026 · NIST NVD

    Updated

    cleanup_xml_node() in the SOAP XML parser recurses once per XML nesting level with no depth limit. An unauthenticated attacker can post a SOAP request containing tens of thousands of nested elements to any SoapServer endpoint, exhaust the stack and crash the process. The same unbounded recursion exists in the SOAP value decoder and in the WSDL node search helper.

Sources

  • CVE.orgVulnerability recordCVE-2026-91765

    Official CVE identifier

    cve.org
  • NIST NVDVulnerability recordCVE-2026-91765

    cleanup_xml_node() in the SOAP XML parser recurses once per XML nesting level with no depth limit. An unauthenticated attacker can post a SOAP request containing tens of thousands of nested elements to any SoapServer endpoint, exhaust the stack and crash the process. The same unb

    nvd.nist.gov

References

Freshness

Last verified in this catalog Oct 23, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.