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TI-2026-61976 Aliases CVE-2026-91765

SOAP: Unbounded Recursion in Server-Side cleanup_xml_node

Priority LOW 39CWE-674Published · 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: 4 fixed, 3 without a fix

Attack profile from CVSS 3.1 · CNA. Fix status from CNA and Red Hat. Impact type from CWE-674.

Summary

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00378 31st percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix Partial PHP (PHP Group): 8.2.34, 8.3.35, 8.4.26 +1Red Hat: 8 advisoriesRed Hat: 4 fixed, 3 without a fix

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
Yes
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
PHP GroupPHPbefore 8.2.34; before 8.3.35; before 8.4.26; before 8.5.118.2.34, 8.3.35, 8.4.26, 8.5.11Patch availableCNA
  • PHP VendorPHP Group Affected before 8.2.34; before 8.3.35; before 8.4.26; before 8.5.11 Fixed in 8.2.34, 8.3.35, 8.4.26, 8.5.11 Patch available CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:php:php:*:*:*:*:*:*:*:*8.2.0 to before 8.2.34; 8.3.0 to before 8.3.35; 8.4.0 to before 8.4.26; 8.5.0 to before 8.5.11VulnerablePHP
  • cpe:2.3:a:php:php:*:*:*:*:*:*:*:* Versions 8.2.0 to before 8.2.34; 8.3.0 to before 8.3.35; 8.4.0 to before 8.4.26; 8.5.0 to before 8.5.11 Vulnerable ·PHP

Remediation

  • Fix · CNA PHP (PHP Group) Fixed in 8.2.34, 8.3.35, 8.4.26, 8.5.11

Red Hat 8 advisories

  • RHSA-2026:87079 Released 2026-10-21 · Red Hat rating Important
    php:8.3 security update
    • Red Hat Enterprise Linux AppStream (v. 9) apcu-panel-5.1.23-1.module+el9.8.0+24343+756b4fcd.noarch::php:8.3, php-8.3.36-1.module+el9.8.0+25109+6886e21a.aarch64::php:8.3, php-8.3.36-1.module+el9.8.0+25109+6886e21a.ppc64le::php:8.3 +47
  • RHSA-2026:87072 Released 2026-10-21 · Red Hat rating Important
    php:8.2 security update
    • Red Hat Enterprise Linux AppStream (v. 9) apcu-panel-5.1.23-1.module+el9.7.0+24111+199d2cc4.noarch::php:8.2, php-8.2.35-1.module+el9.8.0+25111+a1450321.aarch64::php:8.2, php-8.2.35-1.module+el9.8.0+25111+a1450321.ppc64le::php:8.2 +47
  • RHSA-2026:87073 Released 2026-10-21 · Red Hat rating Important
    php:8.2 security update
    • Red Hat Enterprise Linux AppStream (v. 8) apcu-panel-5.1.23-1.module+el8.10.0+20770+a5eca186.noarch::php:8.2, libzip-1.7.3-1.module+el8.10.0+20770+a5eca186.aarch64::php:8.2, libzip-1.7.3-1.module+el8.10.0+20770+a5eca186.ppc64le::php:8.2 +47
Show 5 more Red Hat advisories
  • RHSA-2026:87070 Released 2026-10-21 · Red Hat rating Important
    php security update
    • Red Hat Enterprise Linux AppStream (v. 10) php-8.3.36-1.el10_2, php-bcmath-8.3.36-1.el10_2, php-cli-8.3.36-1.el10_2 +22
  • RHSA-2026:87071 Released 2026-10-21 · Red Hat rating Important
    php8.4 security update
    • Red Hat Enterprise Linux AppStream (v. 10) php8.4-8.4.27-1.el10_2, php8.4-bcmath-8.4.27-1.el10_2, php8.4-cli-8.4.27-1.el10_2 +22
  • RHSA-2026:87151 Released 2026-10-21 · Red Hat rating Important
    php security update
    • Red Hat Enterprise Linux AppStream (v. 9) php-8.0.30-8.el9_8.1, php-bcmath-8.0.30-8.el9_8.1, php-cli-8.0.30-8.el9_8.1 +22
  • RHSA-2026:87080 Released 2026-10-21 · Red Hat rating Important
    php:7.4 security update
    • Red Hat Enterprise Linux AppStream (v. 8) apcu-panel-5.1.18-1.module+el8.10.0+22485+a3539972.noarch::php:7.4, libzip-1.6.1-1.module+el8.10.0+22485+a3539972.aarch64::php:7.4, libzip-1.6.1-1.module+el8.10.0+22485+a3539972.ppc64le::php:7.4 +47
  • RHSA-2026:70720 Released 2026-09-23 · Red Hat rating Important
    Red Hat Hardened Images RPMs bug fix and enhancement update
    • Red Hat Hardened Images php-8.5.11-2.hum1@aarch64, php-8.5.11-2.hum1@src, php-8.5.11-2.hum1@x86_64 +47

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

  • Release ·

    PHP 8.2.34, 8.3.35 and 2 more versions

    11 records Highest priority Priority HIGH 1 HIGH, 3 MEDIUM, 7 LOW

    Other records, highest priority first

    • TI-2026-63096 Out-of-bounds read in the HTTP stream wrapper when following a redirect with an empty Location headerPriority HIGH 65
    • TI-2026-14392 PHP on Windows: Reserved Device Names Are Not Rejected Before File/Stream I/O which can cause DoSPriority MEDIUM 64
    • TI-2025-12959 Integer overflow to buffer overflow in soap HTTP parsingPriority MEDIUM 62
    Show all 11 records →

Vendor assessments

Red Hat

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

ProductStatusPlan or fix
Red Hat Enterprise Linux 6AffectedNo fix yet
Red Hat Enterprise Linux 7AffectedNo fix yet
Red Hat Enterprise Linux 9AffectedNo fix yet
Red Hat Enterprise Linux AppStream (v. 10)Fixed RHSA-2026:87070, RHSA-2026:87071
Red Hat Enterprise Linux AppStream (v. 8)Fixed RHSA-2026:87073, RHSA-2026:87080
Red Hat Enterprise Linux AppStream (v. 9)Fixed RHSA-2026:87072, RHSA-2026:87079, RHSA-2026:87151
Red Hat Hardened ImagesFixed RHSA-2026:70720
Not affected: 2 products
  • Red Hat OpenShift AI (RHOAI)
  • Red Hat OpenShift Dev Spaces

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-91765
  2. 2026-10-21 Fix available: RHSA-2026:87080 · Red Hat
  3. 2026-10-21 Fix available: Red Hat Enterprise Linux AppStream (v. 8) · Red Hat
  4. 2026-10-22 Fix available: RHSA-2026:87071 · Red Hat
  5. 2026-10-22 Fix available: RHSA-2026:87070 · Red Hat
  6. 2026-10-22 Fix available: RHSA-2026:87079 · Red Hat
  7. 2026-10-22 Fix available: RHSA-2026:87073 · Red Hat
  8. 2026-10-22 Fix available: RHSA-2026:87072 · Red Hat
  9. 2026-10-22 Fix available: RHSA-2026:87151 · Red Hat
  10. 2026-10-23 Fix available: Red Hat Enterprise Linux AppStream (v. 10), Red Hat Enterprise Linux AppStream (v. 9) · Red Hat
  11. 2026-10-24 Priority changed: LOW → MEDIUM
  12. 2026-10-25 Priority changed: MEDIUM → LOW

References

Exploit 1

  • TI-2024-04260 Argument Injection in PHP-CGI KEVCVSS 3.1CRITICAL 9.8
  • TI-2026-78794 PHP remote code execution via stale global state KEVCVSS 4.0CRITICAL 9.2
  • TI-2026-78793 Out-of-memory handling flaw in PHP allows remote code execution KEVCVSS 4.0CRITICAL 9.2
  • TI-2024-01743 Command injection via array-ish $command parameter of proc_open() CVSS 3.1CRITICAL 9.4
  • TI-2022-13555 PDO::quote() may return unquoted string CVSS 3.1CRITICAL 9.1
  • TI-2024-10408 Reference counting in php_request_shutdown causes Use-After-Free CVSS 4.0CRITICAL 9.2
See all 107 →

Sources

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