CVE-2026-6722
Description
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.
Predictions
Heuristic predictions, AS-IS, for prioritization only.
Mitigations
Vendor advisory: debian — https://security-tracker.debian.org/tracker/CVE-2026-6722
Vendor advisory: suse — https://www.suse.com/security/cve/CVE-2026-6722.html
Vendor advisory: security@php.net — https://github.com/php/php-src/security/advisories/GHSA-85c2-q967-79q5
OS impact
| OS | Version | Status | Fixed in |
|---|---|---|---|
| sles | affected | | |
| debian | bookworm | fixed | 8.2.31-1~deb12u1 |
| debian | forky | fixed | 8.4.21-1 |
| debian | sid | fixed | 8.4.21-1 |
| debian | trixie | fixed | 8.4.21-1~deb13u1 |
| debian | bullseye | fixed | 7.4.33-1+deb11u11 |
Application impact
| Vendor | Product | Versions | Fixed |
|---|---|---|---|
| php | php | {"startIncluding":"8.2.0","endExcluding":"8.2.31"} | 8.2.31 |
References
CWEs
CWE-416
Verify integrity in audit chain (admin only). AS-IS.