Skip to content
Fencer Vulns
high 7.7

CVE-2026-6722 json

Use-After-Free in SOAP using Apache map

published 2026-05-07 6 mo ago modified 2026-09-08 2 mo ago also BIT-libphp-2026-6722 , BIT-php-2026-6722 , BIT-php-min-2026-6722 , EUVD-2026-28966 , GHSA-85c2-q967-79q5

cvss
7.7
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.9%
EPSS 0.9% chance of exploitation in 30 days, percentile 59%
public exploits
0
none known

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.

Patch / fix

  • bitnami libphp 8.2.31, 8.3.31, 8.4.21, 8.5.6
  • bitnami php 8.2.31, 8.3.31, 8.4.21, 8.5.6
  • bitnami php-min 8.2.31, 8.3.31, 8.4.21, 8.5.6
  • PHP Group PHP 8.2.31, 8.3.31, 8.4.21, 8.5.6
  • Red Hat Red Hat Enterprise Linux 10 0:8.3.31-1.el10_2, 0:8.4.21-1.el10_2
  • Red Hat Red Hat Enterprise Linux 8 8100020260521052503.f7998665, 8100020260604072603.f7998665
  • Red Hat Red Hat Enterprise Linux 9 0:8.0.30-6.el9_8, 9080020260521080715.9, 9080020260521113736.9
  • php8.2 Debian 12 8.2.31-1~deb12u1
  • php8.4 Debian 13 8.4.21-1~deb13u1
  • php8.4 Debian 14 8.4.21-1

debian advisories DEBIAN-CVE-2026-6722

  • php8.1 Ubuntu 22.04 LTS 8.1.2-1ubuntu2.24
  • php8.3 Ubuntu 24.04 LTS 8.3.6-0ubuntu0.24.04.9
  • php8.4 Ubuntu 25.10 8.4.11-1ubuntu1.2
  • php8.5 Ubuntu 26.04 LTS 8.5.4-0ubuntu1.1
  • php7.0 Ubuntu Pro 16.04 LTS 7.0.33-0ubuntu0.16.04.16+esm19

ubuntu advisories UBUNTU-CVE-2026-6722

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • php hummingbird 1 8.5.9-1.hum1
  • php-gd hummingbird 1 8.5.9-1.hum1
  • php-cli hummingbird 1 8.5.9-1.hum1
  • php-dba hummingbird 1 8.5.9-1.hum1
  • php-dbg hummingbird 1 8.5.9-1.hum1
  • php-ffi hummingbird 1 8.5.9-1.hum1
  • php-fpm hummingbird 1 8.5.9-1.hum1
  • php-gmp hummingbird 1 8.5.9-1.hum1

red hat advisories RHSA-2026:47200RHSA-2026:34354RHSA-2026:33449RHSA-2026:23388RHSA-2026:22649RHSA-2026:22305

  • php8 openSUSE Tumbleweed 8.5.6-1.1

opensuse advisories openSUSE-SU-2026:10747-1

  • php AlmaLinux 8 7.4.33-4.module_el8.10.0+4209+2ed16ff0
  • libzip AlmaLinux 8 1.6.1-1.module_el8.6.0+3239+bedf0508
  • libzip AlmaLinux 8 1.6.1-1.module_el8.6.0+2750+78feabcb
  • libzip AlmaLinux 8 1.6.1-1.module_el8.10.0+3935+28808425
  • php-gd AlmaLinux 8 7.4.33-4.module_el8.10.0+4209+2ed16ff0
  • php-cli AlmaLinux 8 7.4.33-4.module_el8.10.0+4209+2ed16ff0
  • php-dba AlmaLinux 8 7.4.33-4.module_el8.10.0+4209+2ed16ff0
  • php-dbg AlmaLinux 8 7.4.33-4.module_el8.10.0+4209+2ed16ff0

almalinux advisories ALSA-2026:34354ALSA-2026:33449ALSA-2026:23388ALSA-2026:22649ALSA-2026:22142ALSA-2026:22143

  • php Rocky Linux 9 8.0.30-6.el9_8
  • libzip Rocky Linux 8 1.6.1-1.module+el8.10.0+1604+6558efc7
  • libzip Rocky Linux 8 1.6.1-1.module+el8.10.0+1912+72767185
  • php-pear Rocky Linux 8 1:1.10.13-1.module+el8.10.0+1604+6558efc7
  • php-pear Rocky Linux 8 1:1.10.13-1.module+el8.10.0+1605+02e07af7
  • php-pear Rocky Linux 8 1:1.10.13-1.module+el8.10.0+1912+72767185
  • php-pecl-rrd Rocky Linux 8 2.0.1-1.module+el8.4.0+414+2e7afcdd
  • php-pecl-rrd Rocky Linux 8 2.0.1-1.module+el8.10.0+1912+72767185

rocky linux advisories RLSA-2026:33449RLSA-2026:34354

  • php81 Alpine 3.19 8.1.34-r0
  • php82 Alpine 3.22 8.2.31-r0
  • php83 Alpine 3.22 8.3.36-r0
  • php83 Alpine 3.24, Alpine 3.23 8.3.31-r0
  • php84 Alpine 3.22 8.4.27-r0
  • php84 Alpine 3.24, Alpine 3.23 8.4.21-r0
  • php85 Alpine 3.24, Alpine 3.23 8.5.6-r0

alpine advisories ALPINE-CVE-2026-6722

Alpine secdb © Alpine Linux, from https://secdb.alpinelinux.org via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • php Azure Linux 3.0 8.3.31-1

azure linux advisories AZL-86349

Azure Linux vulnerability data, Copyright (c) Microsoft Corporation, from https://github.com/microsoft/AzureLinuxVulnerabilityData via OSV, under the MIT licence; changed: normalised to fixed package versions per release. MIT

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2026-6722 updated cvss 7.7

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

  • Red Hat Enterprise Linux 6 php, php-gd, php-cli, php-dba, php-fpm, php-pdo, +20 more
    affected: workaround, no fix planned “Out of support scope”
  • Red Hat Enterprise Linux 7 php, php-gd, php-cli, php-dba, php-fpm, php-pdo, +18 more
    affected: workaround, no fix available
  • Red Hat Enterprise Linux AppStream (v. 8) php 7.4.33-4.module+el8.10.0+24352+91532d3e, php 8.2.31-1.module+el8.10.0+24323+abc2b0db, libzip 1.6.1-1.module+el8.10.0+22485+a3539972, libzip 1.7.3-1.module+el8.10.0+20770+a5eca186, php-gd 7.4.33-4.module+el8.10.0+24352+91532d3e, php-gd 8.2.31-1.module+el8.10.0+24323+abc2b0db, +60 more
    fixed: vendor fix RHSA-2026:34354
  • Red Hat Enterprise Linux AppStream (v. 9) php 8.0.30-6.el9_8, php-gd 8.0.30-6.el9_8, php-cli 8.0.30-6.el9_8, php-dba 8.0.30-6.el9_8, php-dbg 8.0.30-6.el9_8, php-ffi 8.0.30-6.el9_8, +77 more
    fixed: vendor fix RHSA-2026:22142
  • Red Hat Enterprise Linux AppStream (v. 10) php 8.3.31-1.el10_2, php-gd 8.3.31-1.el10_2, php8.4 8.4.21-1.el10_2, php-cli 8.3.31-1.el10_2, php-dba 8.3.31-1.el10_2, php-dbg 8.3.31-1.el10_2, +42 more
    fixed: vendor fix RHSA-2026:23388
  • Red Hat Hardened Images php 8.5.9-1.hum1, php-gd 8.5.9-1.hum1, php-cli 8.5.9-1.hum1, php-dba 8.5.9-1.hum1, php-dbg 8.5.9-1.hum1, php-ffi 8.5.9-1.hum1, +21 more
    fixed: vendor fix RHSA-2026:47200

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
total
Assessed
5 mo ago

Exploit prediction

0.89% chance of exploitation in the next 30 days, higher than 59% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 4.0 9.5 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
CISA ADP 3.1 7.7 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:L
CNA 4.0 9.5 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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:Y/R:X/V:X/RE:M/U:Red
NVD 3.1 9.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CNA 3.1 7.7 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:L

Affected packages

ecosystem package affected fixed in
bitnami libphp
>=8.2.0, <8.2.31
>=8.3.0, <8.3.31
>=8.4.0, <8.4.21
>=8.5.0, <8.5.6
8.2.31
8.3.31
8.4.21
8.5.6
bitnami php
>=8.2.0, <8.2.31
>=8.3.0, <8.3.31
>=8.4.0, <8.4.21
>=8.5.0, <8.5.6
8.2.31
8.3.31
8.4.21
8.5.6
bitnami php-min
>=8.2.0, <8.2.31
>=8.3.0, <8.3.31
>=8.4.0, <8.4.21
>=8.5.0, <8.5.6
8.2.31
8.3.31
8.4.21
8.5.6

Affected products

  • PHP Group PHP
  • Red Hat Red Hat Enterprise Linux 10
  • Red Hat Red Hat Enterprise Linux 8
  • Red Hat Red Hat Enterprise Linux 9
  • Red Hat Red Hat Enterprise Linux 6
  • Red Hat Red Hat Enterprise Linux 7

Classification

Weakness
Technology feeds

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

The maintainers of php/php-src published their own advisory on GitHub. Reviewed sources take precedence over it.

CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.