Which versions of PHP are affected by CVE-2026-4830?

Organizations using A vulnerability should be aware of moderate risk from CVE-2026-4830, a unrestricted file upload vulnerability rated CVSS 6.3. This could allow unauthorized file access.

Is there a public PoC exploit available for CVE-2026-4830?

Yes, a public proof-of-concept exploit is available for CVE-2026-4830. Prioritise patching immediately. EPSS: 0.0%.

PHP CVE-2026-4830

Q: What is the CVSS score of CVE-2026-4830?

CVE-2026-4830 has a CVSS 4.0 base score of 2.9 (Low). CVSS vector: CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P/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:X/R:X/V:X/RE:X/U:X. EPSS exploitation probability: 0.0%.

EUVD-2026-16072 LOW

Unrestricted Upload of File with Dangerous Type (CWE-434)

2026-03-26 VulDB

GHSA-264f-3frq-cpxq

PHP File Upload

2.9

CVSS 4.0

CVSS VectorNVD

CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P/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:X/R:X/V:X/RE:X/U:X

Attack Vector

Network

Attack Complexity

High

Privileges Required

None

User Interaction

None

Scope

Lifecycle Timeline

Severity Changed

Apr 29, 2026 - 01:11 NVD

MEDIUM LOW

CVSS changed

Apr 29, 2026 - 01:11 NVD

6.3 (MEDIUM) 2.9 (LOW)

PoC Detected

Mar 30, 2026 - 13:26 vuln.today

Public exploit code

EUVD ID Assigned

Mar 26, 2026 - 01:00 euvd

EUVD-2026-16072

Analysis Generated

Mar 26, 2026 - 01:00 vuln.today

CVE Published

Mar 26, 2026 - 00:18 nvd

MEDIUM 6.3

DescriptionNVD

A vulnerability was identified in kalcaddle kodbox 1.64. This issue affects the function Add of the file app/controller/explorer/userShare.class.php of the component Public Share Handler. Such manipulation leads to unrestricted upload. The attack can be executed remotely. This attack is characterized by high complexity. The exploitability is assessed as difficult. The exploit is publicly available and might be used. The vendor was contacted early about this disclosure but did not respond in any way.

AnalysisAI

An unrestricted file upload vulnerability exists in Kalcaddle Kodbox 1.64 within the Public Share Handler component's userShare.class.php file. This allows unauthenticated remote attackers to upload arbitrary files by manipulating the Add function, potentially leading to remote code execution and system compromise. …

RemediationAI

Within 30 days: Identify affected systems and apply vendor patches as part of regular patch cycle. Review file handling controls.

Analysis

Detailed AI-generated intelligence summary covering attack vector, impact assessment, affected versions, remediation steps, and indicators of compromise.

POChttps://••••••••••.com/exploit

PATCHhttps://••••••••••.com/patch

ADVISORYhttps://••••••••••.com/advisory

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CVE-2026-4830 vulnerability details – vuln.today

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