Is CVE-2026-6722 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2026-6722 being exploited in the wild.

How severe is CVE-2026-6722?

Critical severity, with a CVSS score of 9.8, published 10 May 2026.

Which products and versions are affected?

PHP Group PHP 8.2.* before 8.2.31, 8.3.* before 8.3.31, 8.4.* before 8.4.21, 8.5.* before 8.5.6.

Is there a fix for CVE-2026-6722?

A patch was published on 2026-05-10: Fixes released in PHP 8.2.31, 8.3.31, 8.4.21, and 8.5.6 Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

How is CVE-2026-6722 attacked?

It is attacked over the network, in a software library.

Am I affected by CVE-2026-6722?

Check whether you run PHP Group PHP at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

CVE-2026-6722: PHP SOAP extension use-after-free remote code execution

CVE-2026-6722 · Severity: critical · CVSS 9.8 · Published 2026-05-10

A critical vulnerability has been identified in the PHP SOAP extension, which is commonly used by web applications to exchange structured information. An attacker can exploit this flaw by sending a specially crafted SOAP request to a vulnerable server, potentially allowing them to take full control of the system. This could lead to the theft of sensitive customer data, complete service disruption, or a total compromise of the underlying server infrastructure.

Technologies: PHP Group PHP. Vendors: PHP Group.

Quick answers

Is CVE-2026-6722 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2026-6722 being exploited in the wild.
How severe is CVE-2026-6722?: Critical severity, with a CVSS score of 9.8, published 10 May 2026.
Which products and versions are affected?: PHP Group PHP 8.2.* before 8.2.31, 8.3.* before 8.3.31, 8.4.* before 8.4.21, 8.5.* before 8.5.6.
Is there a fix for CVE-2026-6722?: A patch was published on 2026-05-10: Fixes released in PHP 8.2.31, 8.3.31, 8.4.21, and 8.5.6 Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
How is CVE-2026-6722 attacked?: It is attacked over the network, in a software library.
Am I affected by CVE-2026-6722?: Check whether you run PHP Group PHP at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

Technical details

A use-after-free (UAF) vulnerability exists in the PHP SOAP extension (ext-soap) due to improper reference counting in the object deduplication mechanism. When processing an 'apache:Map' node with duplicate keys, the extension overwrites entries in a temporary result map, freeing the original PHP object while maintaining a stale pointer in the global 'ref_map'. A subsequent 'href' reference to the freed node allows an attacker to copy this dangling pointer. By manipulating memory allocations (e.g., via PHP string allocations) to reclaim the freed region, a remote, unauthenticated attacker can achieve arbitrary code execution. The issue is resolved by ensuring reference counts are incremented before adding objects to the global map and using proper deallocators.

Affected products

PHP Group PHP 8.2.* before 8.2.31, 8.3.* before 8.3.31, 8.4.* before 8.4.21, 8.5.* before 8.5.6
Red Hat Red Hat Enterprise Linux 6
Red Hat Red Hat Enterprise Linux 7
Red Hat Red Hat Enterprise Linux 8
Red Hat Red Hat Enterprise Linux 9
Red Hat Red Hat Enterprise Linux 10

Timeline

2026-05-07: advisory: PHP Group published security advisory GHSA-85c2-q967-79q5
2026-05-10: disclosed: CVE-2026-6722 published to NVD
2026-05-10: patched: Fixes released in PHP 8.2.31, 8.3.31, 8.4.21, and 8.5.6

References

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