Which versions of PHP are affected by CVE-2026-0851?

Organizations using A vulnerability face moderate risk from CVE-2026-0851, a injection vulnerability rated CVSS 7.3.

Is there a public PoC exploit available for CVE-2026-0851?

Yes, a public proof-of-concept exploit is available for CVE-2026-0851. Prioritise patching immediately. EPSS: 0.0%.

How to fix or mitigate CVE-2026-0851?

Within 7 days: Identify all affected systems and apply vendor patches promptly. Monitor vendor channels for patch availability.

PHP CVE-2026-0851

Q: What is the CVSS score of CVE-2026-0851?

CVE-2026-0851 has a CVSS 4.0 base score of 5.5 (Medium). CVSS vector: CVSS:4.0/AV:N/AC:L/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%.

MEDIUM

Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection') (CWE-74)

2026-01-12 cna@vuldb.com

PHP SQLi

5.5

CVSS 4.0 · NVD

Severity by source

NVD PRIMARY

5.5 MEDIUM

CVSS:4.0/AV:N/AC:L/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

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

CVSS:4.0/AV:N/AC:L/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

Low

Privileges Required

None

User Interaction

None

Scope

Lifecycle Timeline

Severity Changed

Apr 29, 2026 - 01:11 NVD

HIGH MEDIUM

CVSS changed

Apr 29, 2026 - 01:11 NVD

7.3 (HIGH) 5.5 (MEDIUM)

Analysis Generated

Mar 12, 2026 - 21:54 vuln.today

PoC Detected

Jan 14, 2026 - 22:18 vuln.today

Public exploit code

CVE Published

Jan 12, 2026 - 00:15 nvd

HIGH 7.3

DescriptionCVE.org

A vulnerability was identified in code-projects Online Music Site 1.0. The affected element is an unknown function of the file /Administrator/PHP/AdminAddUser.php. The manipulation of the argument txtusername leads to sql injection. Remote exploitation of the attack is possible. The exploit is publicly available and might be used.

AnalysisAI

SQL injection in code-projects Online Music Site 1.0 via the txtusername parameter in AdminAddUser.php enables unauthenticated remote attackers to manipulate database queries and potentially access or modify sensitive data. Public exploit code exists for this vulnerability, increasing the risk of active exploitation. …

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Risk assessment & exploitation conditions
Attack chain visualization
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Threat intelligence from 22 sources
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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata

Access

Send HTTP request to /Administrator/PHP/AdminAddUser.php

Exploit

Inject SQL payload in txtusername parameter

Execution

Bypass authentication and extract database

Impact

Access user credentials and sensitive data

Access

Send HTTP request to /Administrator/PHP/AdminAddUser.php

Exploit

Inject SQL payload in txtusername parameter

Execution

Bypass authentication and extract database

Impact

Access user credentials and sensitive data

Vulnerability AssessmentAI

Exploitation	Remote unauthenticated access to /Administrator/PHP/AdminAddUser.php endpoint in code-projects Online Music Site 1.0 with no input validation on txtusername parameter. Additional conditions and limiting factors are described in the full assessment.
Risk Assessment	CVSS 7.3 (HIGH). … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in.
Exploit Scenario	A remote attacker (requires authentication) could exploit this flaw, sql injection.
Remediation	Monitor vendor advisories for a patch. … Detailed patch versions, workarounds, and compensating controls in full report.

Recommended ActionAI

Within 7 days: Identify all affected systems and apply vendor patches promptly. …

Threat intelligence, references, and detailed analysis are available after sign-in.

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CVE-2026-0851 vulnerability details – vuln.today

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PHP CVE-2026-0851

Severity by source

CVSS VectorNVD

Lifecycle Timeline

DescriptionCVE.org

AnalysisAI

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Attack ChainAIDerived

Vulnerability AssessmentAI

Recommended ActionAI

More from same product – last 7 days

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External POC / Exploit Code