CVE-2026-6722

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.

Affected Software

VendorProductVersion RangeStatus
PHP GroupPHP8.2.* < 8.2.31affected
PHP GroupPHP8.3.* < 8.3.31affected
PHP GroupPHP8.4.* < 8.4.21affected
PHP GroupPHP8.5.* < 8.5.6affected

Weaknesses

  • CWE-416: CWE-416 Use After Free

ADP Enrichment

CISA ADP Vulnrichment

  • SSVC:
  • Exploitation: none
    • Automatable: no
    • Technical Impact: total

php: php-soap: php-src: PHP SOAP extension: Remote Code Execution via use-after-free vulnerability

Additional References

References