CVE-2026-7260: CWE-121 Stack-based buffer overflow in PHP Group PHP
CVE-2026-7260 is a stack-based buffer overflow vulnerability in PHP caused by circular symbolic links in phar archives. This flaw can trigger unbounded recursion, exhausting the C stack and crashing the PHP process. It affects PHP versions prior to 8.2.33, 8.3.33, 8.4.24, and 8.5.9. The vulnerability has a medium severity rating with a CVSS score of 5.4. No official patch or remediation level is currently confirmed in the provided data.
AI Analysis
Technical Summary
The vulnerability identified as CVE-2026-7260 involves a stack-based buffer overflow (CWE-121) in PHP. Specifically, circular symbolic links within phar archives can cause unbounded recursion, which exhausts the C stack and results in a crash of the PHP process. This affects multiple PHP version branches: all versions before 8.2.33, 8.3.33, 8.4.24, and 8.5.9 are vulnerable. The CVSS 4.0 vector indicates local attack vector with low complexity, no privileges required, user interaction needed, and high vulnerability attack impact. There is no vendor advisory or patch information provided to confirm remediation status.
Potential Impact
Successful exploitation leads to a denial of service by crashing the PHP process due to stack exhaustion from unbounded recursion. There is no indication of code execution or data disclosure in the provided data. The impact is limited to process crash and service disruption.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, avoid processing untrusted phar archives containing symbolic links that could be circular. Monitor PHP vendor communications for updates on patches addressing this issue.
CVE-2026-7260: CWE-121 Stack-based buffer overflow in PHP Group PHP
Description
CVE-2026-7260 is a stack-based buffer overflow vulnerability in PHP caused by circular symbolic links in phar archives. This flaw can trigger unbounded recursion, exhausting the C stack and crashing the PHP process. It affects PHP versions prior to 8.2.33, 8.3.33, 8.4.24, and 8.5.9. The vulnerability has a medium severity rating with a CVSS score of 5.4. No official patch or remediation level is currently confirmed in the provided data.
CVSS v4.0
Score 5.4medium
Affected software
PHP Group
PHP
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Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The vulnerability identified as CVE-2026-7260 involves a stack-based buffer overflow (CWE-121) in PHP. Specifically, circular symbolic links within phar archives can cause unbounded recursion, which exhausts the C stack and results in a crash of the PHP process. This affects multiple PHP version branches: all versions before 8.2.33, 8.3.33, 8.4.24, and 8.5.9 are vulnerable. The CVSS 4.0 vector indicates local attack vector with low complexity, no privileges required, user interaction needed, and high vulnerability attack impact. There is no vendor advisory or patch information provided to confirm remediation status.
Potential Impact
Successful exploitation leads to a denial of service by crashing the PHP process due to stack exhaustion from unbounded recursion. There is no indication of code execution or data disclosure in the provided data. The impact is limited to process crash and service disruption.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, avoid processing untrusted phar archives containing symbolic links that could be circular. Monitor PHP vendor communications for updates on patches addressing this issue.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- php
- Date Reserved
- 2026-04-28T05:07:45.654Z
- Cvss Version
- 4.0
- State
- PUBLISHED
Threat ID: 6a6b37829c2644c7f800167b
Added to database: 07/30/2026, 11:37:38 UTC
Last enriched: 08/06/2026, 18:02:56 UTC
Last updated: 09/10/2026, 19:57:45 UTC
Views: 104
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