CVE-2026-6722
CriticalCVSS 9.8Exploitation Probability (EPSS)
Elevated risk56th percentile - higher than 56% of all known CVEs
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.
Risk Assessment
An attacker can remotely execute arbitrary code on the PHP server by sending a specially crafted SOAP request, potentially leading to full application compromise.
Recommendation
Immediately update PHP to versions 8.2.31, 8.3.31, 8.4.21, 8.5.6 or later, which contain the fix for this vulnerability.
Other vulnerabilities in PHP
See all- CVE-2026-13081Unknown
This CVE has been rejected. Reason: Red Hat is not the CNA for PHP. CVE was reserved in error; the appropriate CNA should assign CVE IDs for these vulnerabilities.
- CVE-2026-13047Unknown
This CVE has been rejected. Reason: Red Hat is not the CNA for PHP. CVE was reserved in error; the appropriate CNA should assign CVE IDs for these vulnerabilities.
- CVE-2017-12934High
PHP versions 7.0.x before 7.0.21 and 7.1.x before 7.1.7 are prone to a heap use after free while unserializing untrusted data. This issue is related to the zval_get_type function in Zend/zend_types.h.
- CVE-2017-11628High
In PHP versions before 5.6.31, 7.x before 7.0.21, and 7.1.x before 7.1.7, a stack-based buffer overflow in the zend_ini_do_op() function could lead to denial of service or potentially allow executing code. This issue is relevant for PHP applications that accept untrusted input for the parse_ini_string or parse_ini_file function.
- CVE-2017-11142High
In PHP versions before 5.6.31, 7.x before 7.0.17, and 7.1.x before 7.1.3, remote attackers could cause a denial of service attack by injecting long form variables, leading to excessive CPU consumption.
- CVE-2016-5399High
The bzread function in PHP before 5.5.38, 5.6.x before 5.6.24, and 7.x before 7.0.9 allows remote attackers to cause a denial of service (out-of-bounds write) or execute arbitrary code via a crafted bz2 archive.
- CVE-2017-6441High
The _zval_get_long_func_ex function in PHP 7.1.2 has a vulnerability that allows attackers to cause a denial of service through crafted use of 'declare(ticks=' in a PHP script, leading to a NULL pointer dereference and application crash.
- CVE-2017-7272High
PHP versions up to 7.1.11 enable potential SSRF attacks in applications that accept a hostname argument for fsockopen or pfsockopen, expecting the port number to be constrained. Due to the recognition of :port syntax, fsockopen will use the port number specified in the hostname argument instead of the port number in the second argument of the function.
- CVE-2016-10161High
The object_common1 function in PHP before 5.6.30, 7.0.x before 7.0.15, and 7.1.x before 7.1.1 allows remote attackers to cause a denial of service (buffer over-read and application crash) via crafted serialized data that is mishandled in a finish_nested_data call.
- CVE-2016-10158High
The exif_convert_any_to_int function in PHP before 5.6.30, 7.0.x before 7.0.15, and 7.1.x before 7.1.1 allows remote attackers to cause a denial of service (application crash) via crafted EXIF data that triggers an attempt to divide the minimum representable negative integer by -1.
Original NVD description (English source)
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.
Vulnerability data from NVD (NIST) · CISA KEV · EPSS