CVE-2026-7260: CWE-121 Stack-based buffer overflow in PHP Group PHP
A stack-based buffer overflow vulnerability exists in PHP due to circular symbolic links in phar archives causing unbounded recursion that exhausts the C stack and crashes the PHP process. This affects PHP versions prior to 8.2.33, 8.3.33, 8.4.24, and 8.5.9. The vulnerability has a medium severity score of 5.4 and does not currently have a confirmed patch or official remediation guidance.
AI Analysis
Technical Summary
CVE-2026-7260 is a stack-based buffer overflow vulnerability (CWE-121) in PHP related to handling circular symbolic links within phar archives. The circular links cause unbounded recursion, leading to exhaustion of the C stack and a crash of the PHP process. This affects multiple PHP branches: 8.2 versions before 8.2.33, 8.3 versions before 8.3.33, 8.4 versions before 8.4.24, and 8.5 versions before 8.5.9. The CVSS 4.0 base score is 5.4, indicating medium severity. No vendor advisory or patch information is currently available to confirm remediation status.
Potential Impact
Exploitation of this vulnerability results in a denial of service condition by crashing the PHP process due to stack exhaustion caused by unbounded recursion. There is no indication of privilege escalation, code execution, or data disclosure from the provided information.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, cautious handling of phar archives and avoiding processing untrusted phar files with symbolic links may reduce risk.
CVE-2026-7260: CWE-121 Stack-based buffer overflow in PHP Group PHP
Description
A stack-based buffer overflow vulnerability exists in PHP due to circular symbolic links in phar archives causing unbounded recursion that exhausts the C stack and crashes the PHP process. This affects PHP versions prior to 8.2.33, 8.3.33, 8.4.24, and 8.5.9. The vulnerability has a medium severity score of 5.4 and does not currently have a confirmed patch or official remediation guidance.
CVSS v4.0
Score 5.4medium
Affected software
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Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-7260 is a stack-based buffer overflow vulnerability (CWE-121) in PHP related to handling circular symbolic links within phar archives. The circular links cause unbounded recursion, leading to exhaustion of the C stack and a crash of the PHP process. This affects multiple PHP branches: 8.2 versions before 8.2.33, 8.3 versions before 8.3.33, 8.4 versions before 8.4.24, and 8.5 versions before 8.5.9. The CVSS 4.0 base score is 5.4, indicating medium severity. No vendor advisory or patch information is currently available to confirm remediation status.
Potential Impact
Exploitation of this vulnerability results in a denial of service condition by crashing the PHP process due to stack exhaustion caused by unbounded recursion. There is no indication of privilege escalation, code execution, or data disclosure from the provided information.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, cautious handling of phar archives and avoiding processing untrusted phar files with symbolic links may reduce risk.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- php
- Date Reserved
- 2026-04-28T05:07:45.654Z
- Cvss Version
- 4.0
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a6b37829c2644c7f800167b
Added to database: 07/30/2026, 11:37:38 UTC
Last enriched: 07/30/2026, 11:53:32 UTC
Last updated: 07/30/2026, 11:53:32 UTC
Views: 4
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