CVE-2026-6722Use-After-Free in SOAP using Apache map
Updated under an hour ago ()
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It affects PHP Group PHP and 2 other products. Add what you run to find out whether that includes you.
No exploitation reported and no EPSS estimate yet.
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Free account, 1 product
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.
- CVSS
- 9.5 CRITICAL (v4.0, CNA)CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/AU:Y/RE:M/U:Red
- Weakness (CWE)
- CWE-416, CWE-825
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- php
- NVD analysis
- Modified
- Record last updated
- Jul 23, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
PHP Group PHP php_group:php (from the name) | from 8.2.* before 8.2.31; from 8.3.* before 8.3.31; from 8.4.* before 8.4.21; from 8.5.* before 8.5.6 | CNA record |
Red Hat Red Hat Enterprise Linux 10 redhat:enterprise_linux | from 0:8.4.21-1.el10_2 not affected | CISA ADP |
php php php:php | from 8.2.0 before 8.2.31; from 8.3.0 before 8.3.31; from 8.4.0 before 8.4.21; from 8.5.0 before 8.5.6 | NVD |
References
- https://github.com/php/php-src/security/advisories/GHSA-85c2-q967-79q5vendor-advisory
- https://access.redhat.com/errata/RHSA-2026:22142
- https://access.redhat.com/errata/RHSA-2026:22143
- https://access.redhat.com/errata/RHSA-2026:22305
- https://access.redhat.com/errata/RHSA-2026:22649
- https://access.redhat.com/errata/RHSA-2026:23388
- https://access.redhat.com/errata/RHSA-2026:33449
- https://access.redhat.com/errata/RHSA-2026:34354
- https://access.redhat.com/security/cve/CVE-2026-6722
- https://bugzilla.redhat.com/show_bug.cgi?id=2468560
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-6722.json
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.