Infinite Loop Vulnerability in phpMyAdmin ShapeFile by phpMyAdmin
CVE-2026-121261

5.3MEDIUM

Key Information:

Vendor

PHPmyadmin
Status
Shapefile
Vendor
CVE Published:
3 November 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-121261?

A vulnerability exists in the ShapeFile component of phpMyAdmin, specifically in the ShapeRecord::loadFromFile function. This flaw allows remote attackers to manipulate the file handling process, potentially leading to an infinite loop condition. The issue has been made public, and there has been no response from the vendor after initial disclosure. Users are advised to stay informed and monitor updates regarding this critical issue to mitigate potential risks.

Affected Version(s)

ShapeFile 4.0.0

ShapeFile 4.0.1

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2026-121261 - Proof of Concept

References

https://vuldb.com/vuln/430227
vdb-entrytechnical-description
https://vuldb.com/vuln/430227/cti
signaturepermissions-required
https://vuldb.com/cve/CVE-2026-121261
third-party-advisory

CVSS V4

Score:
5.3
Severity:
MEDIUM
Confidentiality:
None
Integrity:
None
Availability:
Low
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
Unknown

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

Ishan Oshada
ishanoshada (VulDB User)
ishanoshada (VulDB User)
VulDB CNA Team
.