What is the CVSS score of CVE-2026-91996?

CVE-2026-91996 has a CVSS 4.0 base score of 8.7 (High). CVSS vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N. EPSS exploitation probability: 0.4%.

Is there a public PoC exploit available for CVE-2026-91996?

Yes, a public proof-of-concept exploit is available for CVE-2026-91996. Prioritise patching immediately. EPSS: 0.4%.

Lamp Cloud CVE-2026-91996

EUVD-2026-78436 HIGH

Missing Authentication for Critical Function (CWE-306)

2026-09-15 VulnCheck

GHSA-8h63-cr94-gg65

Authentication Bypass Lamp Cloud Dromara

8.7

CVSS 4.0 · Vendor: VulnCheck

View

Vulnerability Assessment

Weakness

CWE

CWE-306

OWASP Top 10:2025

A07:2025 - Authentication Failures

ASVS 5.0

V6 - Authentication Authentication required for critical functions

MITRE ATT&CK

1 technique across 1 tactic: Initial Access

The technique list with ATT&CK links and the kill-chain view is part of the Basic plan and up.

This Week Schedule remediation this week. Why: HIGH severity (CVSS 7.0-8.9).

1 PoC candidate (unverified) No patch listed yet 0.4% exploitation probability (EPSS)

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AnalysisAIv1 – Sep 15, 2026

Unauthenticated information disclosure in Dromara lamp-cloud through 5.10.0 stems from an overly broad anonymous-access whitelist pattern (/*/anno/**) that exposes the /defGenProject/anno/getProperties endpoint. Any remote attacker who can reach the service via HTTP can POST to that path and receive the server's complete JVM system property map, leaking classpath entries, filesystem paths, OS build details, and startup secrets injected as properties. Exploit code is publicly available (a writeup and proof-of-concept are linked from the CVE references and VulnCheck advisory), and the flaw has not been listed in CISA KEV, so it is a high-value reconnaissance and credential-harvesting primitive rather than a confirmed mass-exploitation event.

Affected VersionsENISA

lamp-cloud 0 ≤5.10.0

Affected Packages

euvd lamp_cloud no fix

Source: OSV (Open Source Vulnerabilities)

Affects your stack

Affects 1 package in euvd

Checking this CVE against your own stacks and servers is part of the Basic plan and up.

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Exploit and PoC references, threat intelligence from 22 sources

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Severity by source

Vendor (VulnCheck) PRIMARY 8.7 HIGH

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N

Primary rating from Vendor (VulnCheck) · only source for this CVE.

CVSS VectorVendor: VulnCheck

Attack Vector

Network

Attack Complexity

Low

Attack Requirements

None

Privileges Required

None

User Interaction

None

Vulnerable system: Confidentiality

High

Vulnerable system: Integrity

None

Vulnerable system: Availability

None

Subsequent system: Confidentiality

None

Subsequent system: Integrity

None

Subsequent system: Availability

None

DescriptionCVE.org

lamp-cloud through 5.10.0 whitelists the path pattern /*/anno/** for anonymous access, allowing unauthenticated attackers to read the server's full JVM system property map. Attackers can send POST requests to /defGenProject/anno/getProperties to retrieve sensitive information including JVM classpath, filesystem paths, operating system details, and startup secrets.

Technical POC Analysis

CWE-306 (Missing Authentication for Critical Function), realized as an allow-list bypass rather than a missing check per se.

Full technical POC analysis - root cause, step-by-step exploitation and patch breakdown - is part of the Pro and Business plans.

Latest POC

1 PoC candidate from github (unverified)

Threat Intelligence Overview

EPSS Score

0.4%

Top 70% exploitable

Data Quality

5 sources

Confidence: Medium

EUVD

NVD

CVE.org

EPSS

GitHub

How this decision was reached

The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.

SignalValue

Severity HIGH

CISA KEV No

Public POC Yes

EPSS 0.4%

Patch available No

Active threat No

Deciding rule

HIGH severity (CVSS 7.0-8.9)

What every action level means

Emergency Immediate action required. Criteria: CRITICAL + in CISA KEV (actively exploited) without patch, OR CRITICAL + EPSS > 30% without patch, OR CRITICAL + active threat signals without patch.

Act Now Prioritize within 24-48h. Criteria: in KEV with patch available, OR CRITICAL + public POC, OR HIGH + EPSS > 10%, OR CRITICAL + active threat, OR any CRITICAL severity.

This Week Schedule remediation this week. Criteria: HIGH severity (CVSS 7.0-8.9). Patch within normal change window.

This Month Plan within 30 days. Criteria: MEDIUM severity (CVSS 4.0-6.9), lower exploitation probability. Include in regular patch cycle.

Monitor Track and reassess. Criteria: LOW severity (CVSS 0.1-3.9), minimal exploitation risk. No immediate action needed.