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Weekly Signal
Live intelligence Updated 21 Aug 2026 · 22:12 UTC

PHP · PHP

CVE-2026-6722

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 me...

Recommended action

Handle this through the normal risk-based patching cycle while monitoring for change. Red Hat Security advisory RHSA-2026:22142

View response plan
CVSS9.5
EPSS0.9%
KEVNo
ExploitationNone
RemediationNot yet verified ↓

Assessment

Why it matters

EPSS is 0.9%; technical severity is CVSS 9.5.

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.

Who should care

  • Teams operating PHP
  • Vulnerability and exposure management teams
  • Security operations teams monitoring exploitation activity

Response plan

What I would do

  1. Confirm whether PHP is present in the environment.
  2. Identify affected versions and establish whether vulnerable services are exposed or reachable.
  3. Red Hat Security advisory RHSA-2026:22142
  4. Review relevant security telemetry for evidence of attempted or successful exploitation.
  5. Document the remediation decision and track it to verified completion.

Treatment intelligence

Remediation intelligence

Not yet verified

Vendor sources are listed before government and third-party guidance. Confirm product applicability and change prerequisites before deployment.

Verification noteAutomated link verification has not completed for this guidance yet.

Advisory

Technical details

CVSS vector
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
CWE
CWE-416
Affected versions
PHP PHP (Start Including 8.2.0, End Excluding 8.2.31 | Start Including 8.3.0, End Excluding 8.3.31 | Start Including 8.4.0, End Excluding 8.4.21 | Start Including 8.5.0, End Excluding 8.5.6)
Fixed versions
PHP PHP (Fixed from 8.2.31, 8.3.31, 8.4.21, 8.5.6)
Published
10 May 2026
Attack vector
Network
Privileges required
None
User interaction
None

Signal timeline

  1. CVE published
  2. Latest EPSS score: 0.9%
  3. Signal calculated at 14

External references

Live public intelligence This assessment combines public-source evidence. Validate the affected product, version and exposure against your own environment before making a risk decision.