Is there a public PoC exploit available for CVE-2026-5556?

Yes, a public proof-of-concept exploit is available for CVE-2026-5556. Prioritise patching immediately. EPSS: 0.0%.

Pi Mono CVE-2026-5556

Q: What is the CVSS score of CVE-2026-5556?

CVE-2026-5556 has a CVSS 4.0 base score of 2.1 (Low). CVSS vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/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-2026-19061 LOW

Code Injection (CWE-94)

2026-04-05 VulDB

Code Injection RCE Pi Mono

2.1

CVSS 4.0 · NVD

Severity by source

NVD PRIMARY

2.1 LOW

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

Low

User Interaction

None

Scope

Lifecycle Timeline

Severity Changed

Apr 29, 2026 - 01:11 NVD

MEDIUM LOW

CVSS changed

Apr 29, 2026 - 01:11 NVD

5.3 (MEDIUM) 2.1 (LOW)

PoC Detected

Apr 07, 2026 - 13:20 vuln.today

Public exploit code

EUVD ID Assigned

Apr 05, 2026 - 09:45 euvd

EUVD-2026-19061

Analysis Generated

Apr 05, 2026 - 09:45 vuln.today

CVE Published

Apr 05, 2026 - 09:30 nvd

MEDIUM 5.3

DescriptionCVE.org

A security vulnerability has been detected in badlogic pi-mono up to 0.58.4. This vulnerability affects the function discoverAndLoadExtensions of the file packages/coding-agent/src/core/extensions/loader.ts. The manipulation leads to code injection. Remote exploitation of the attack is possible. The exploit has been disclosed publicly and may be used. The vendor was contacted early about this disclosure but did not respond in any way.

AnalysisAI

Code injection in badlogic pi-mono up to version 0.58.4 allows authenticated remote attackers to achieve remote code execution through the discoverAndLoadExtensions function in the extension loader module. Publicly available exploit code exists, and the vendor has not responded to early disclosure notifications despite contact attempts. …

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Vulnerability AssessmentAI

Risk Assessment	The CVSS vector (AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L) indicates remote network-based attack with low complexity requiring low privilege authentication and no user interaction, producing confidentiality, integrity, and availability impact. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in.
Exploit Scenario	An authenticated user with access to a pi-mono-based application could craft a malicious extension or extension configuration file and supply it through the extension discovery mechanism. When the discoverAndLoadExtensions function processes this input without proper validation, the injected code executes within the application's context, potentially allowing the attacker to read sensitive data, modify application behavior, or fully compromise system integrity. …
Remediation	No vendor-released patch has been independently confirmed at time of analysis due to vendor non-responsiveness to disclosure. … Detailed patch versions, workarounds, and compensating controls in full report.

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CVE-2026-5556 vulnerability details – vuln.today

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