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Cors Misconfiguration CVE-2026-6662

| EUVD-2026-23923 MEDIUM
Permissive Cross-domain Security Policy with Untrusted Domains (CWE-942)
2026-04-20 VulDB GHSA-6j2q-j3c7-4w55
Information Disclosure Cors Misconfiguration
5.5
CVSS 4.0
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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
X

Lifecycle Timeline

8
CVSS changed
Apr 29, 2026 - 01:12 NVD
6.9 (MEDIUM) 5.5 (MEDIUM)
PoC Detected
Apr 29, 2026 - 01:00 vuln.today
Public exploit code
Analysis Generated
Apr 20, 2026 - 17:53 vuln.today
Severity Changed
Apr 20, 2026 - 17:52 NVD
HIGH MEDIUM
CVSS changed
Apr 20, 2026 - 17:52 NVD
7.3 (HIGH) 6.9 (MEDIUM)
EUVD ID Assigned
Apr 20, 2026 - 17:15 euvd
EUVD-2026-23923
Analysis Generated
Apr 20, 2026 - 17:15 vuln.today
CVE Published
Apr 20, 2026 - 17:00 nvd
MEDIUM 5.5

DescriptionNVD

A vulnerability was found in ericc-ch copilot-api up to 0.7.0. The impacted element is the function cors of the file src/server.ts of the component Token Endpoint. Performing a manipulation results in permissive cross-domain policy with untrusted domains. It is possible to initiate the attack remotely. The exploit has been made public and could be used.

AnalysisAI

Permissive CORS policy in ericc-ch copilot-api up to version 0.7.0 allows remote attackers to access the Token Endpoint without authentication, enabling cross-domain requests from untrusted origins. The vulnerability exists in the cors function of src/server.ts and permits information disclosure with low confidentiality, integrity, and availability impact. …

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CVE-2026-6662 vulnerability details – vuln.today
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