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TI-2026-05890 Aliases CVE-2026-6722

Use-After-Free in SOAP using Apache map

Priority MEDIUM 45CWE-416Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
High
Attack requirements
Present
Impact type
Code execution
Confidentiality · integrity · availability
High · High · High
Fix status
Partial Red Hat: 4 fixed, 2 without a fix

Attack profile from CVSS 4.0 · CNA. Fix status from CNA and Red Hat. Impact type from CWE-416 and the CVSS impact.

Summary

In PHP versions 8.2.* before 8.2.31, 8.3.* before 8.3.31, 8.4.* before 8.4.21, and 8.5.* before 8.5.6, the SOAP extension's object deduplication mechanism stores pointers to PHP objects in a global map without incrementing their reference counts. When an apache:Map node contains duplicate keys, processing the second entry overwrites the first in the temporary result map, freeing the original PHP object while its stale pointer remains in the map. A subsequent href reference to the freed node can copy the dangling pointer into the result. As PHP string allocations can reclaim the freed memory region, an attacker with control over the SOAP request body can exploit this use-after-free to achieve remote code execution.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00894 59th percentileScored 2026-11-07
Fix Partial PHP (PHP Group): 8.2.31, 8.3.31, 8.4.21 +1Red Hat: 8 advisoriesRed Hat: 4 fixed, 2 without a fix

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Total

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 8.2.31; before 8.3.31; before 8.4.21; before 8.5.68.2.31, 8.3.31, 8.4.21, 8.5.6Patch availableCNA
  • PHP VendorPHP Group Affected before 8.2.31; before 8.3.31; before 8.4.21; before 8.5.6 Fixed in 8.2.31, 8.3.31, 8.4.21, 8.5.6 Patch available CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:php:php:*:*:*:*:*:*:*:*8.2.0 to before 8.2.31; 8.3.0 to before 8.3.31; 8.4.0 to before 8.4.21; 8.5.0 to before 8.5.6VulnerablePHP
  • cpe:2.3:a:php:php:*:*:*:*:*:*:*:* Versions 8.2.0 to before 8.2.31; 8.3.0 to before 8.3.31; 8.4.0 to before 8.4.21; 8.5.0 to before 8.5.6 Vulnerable ·PHP

Remediation

  • Fix · CNA PHP (PHP Group) Fixed in 8.2.31, 8.3.31, 8.4.21, 8.5.6

Red Hat 8 advisories

  • RHSA-2026:47200 Released 2026-07-28 · Red Hat rating Critical
    Red Hat Hardened Images RPMs bug fix and enhancement update
    • Red Hat Hardened Images php-8.5.9-1.hum1@aarch64, php-8.5.9-1.hum1@src, php-8.5.9-1.hum1@x86_64 +47
  • RHSA-2026:34354 Released 2026-07-01 · 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-2026:33449 Released 2026-06-30 · Red Hat rating Important
    php security update
    • Red Hat Enterprise Linux AppStream (v. 9) php-8.0.30-6.el9_8, php-bcmath-8.0.30-6.el9_8, php-cli-8.0.30-6.el9_8 +22
Show 5 more Red Hat advisories
  • RHSA-2026:23388 Released 2026-06-04 · Red Hat rating Important
    php security update
    • Red Hat Enterprise Linux AppStream (v. 10) php-8.3.31-1.el10_2, php-bcmath-8.3.31-1.el10_2, php-cli-8.3.31-1.el10_2 +22
  • RHSA-2026:22649 Released 2026-06-02 · Red Hat rating Important
    php8.4 security update
    • Red Hat Enterprise Linux AppStream (v. 10) php8.4-8.4.21-1.el10_2, php8.4-bcmath-8.4.21-1.el10_2, php8.4-cli-8.4.21-1.el10_2 +22
  • RHSA-2026:22305 Released 2026-06-01 · 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
  • RHSA-2026:22142 Released 2026-06-01 · Red Hat rating Important
    php:8.3 security update
    • Red Hat Enterprise Linux AppStream (v. 9) apcu-panel-5.1.23-1.module+el9.6.0+22647+1741ae35.noarch::php:8.3, php-8.3.31-2.module+el9.8.0+24329+a775fb4e.aarch64::php:8.3, php-8.3.31-2.module+el9.8.0+24329+a775fb4e.ppc64le::php:8.3 +47
  • RHSA-2026:22143 Released 2026-06-01 · 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-8.2.31-1.module+el9.8.0+24325+74f58d38.aarch64::php:8.2, php-8.2.31-1.module+el9.8.0+24325+74f58d38.ppc64le::php:8.2 +47

Fixed in the same release

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

  • Release ·

    PHP 8.2.31, 8.3.31 and 2 more versions

    8 records Highest priority Priority MEDIUM 1 MEDIUM, 7 LOW

    Other records, highest priority first

    • TI-2025-12957 SQL injection in pdo_firebird via NUL bytes in quoted stringsPriority LOW 35
    • TI-2026-06375 SoapServer session-persisted object use-after-free via SOAP header faultPriority LOW 34
    • TI-2026-05901 XSS within PHP-FPM status endpointPriority LOW 31
    Show all 8 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 planned: Out of support scope
Red Hat Enterprise Linux 7AffectedNo fix yet
Red Hat Enterprise Linux AppStream (v. 10)Fixed RHSA-2026:22649, RHSA-2026:23388
Red Hat Enterprise Linux AppStream (v. 8)Fixed RHSA-2026:22305, RHSA-2026:34354
Red Hat Enterprise Linux AppStream (v. 9)Fixed RHSA-2026:22142, RHSA-2026:22143, RHSA-2026:33449
Red Hat Hardened ImagesFixed RHSA-2026:47200

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-6722

References

Advisory 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