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WARP-Clash-API EUVDEUVD-2026-76977

| CVE-2026-90504 MEDIUM
Missing Authentication for Critical Function (CWE-306)
2026-09-13 VulDB GHSA-5436-f3r8-9r98
5.5
CVSS 4.0 · Vendor: VulDB
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Severity by source

Vendor (VulDB) 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
vuln.today AI
7.3 HIGH

Network-reachable with no prerequisites (PR:N, AC:L); impact capped at Low across all three pillars given API scope is proxy configuration only.

3.1 AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
4.0 AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N

Primary rating from Vendor (VulDB).

CVSS VectorVendor: VulDB

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
X

Lifecycle Timeline

3
Analysis Generated
Sep 13, 2026 - 10:40 vuln.today
CVSS changed
Sep 13, 2026 - 10:22 NVD
6.9 (MEDIUM) 5.5 (MEDIUM)
CVE Published
Sep 13, 2026 - 08:45 cve.org
MEDIUM 5.5

DescriptionCVE.org

A vulnerability has been found in vvbbnn00 WARP-Clash-API up to c7bf2360073959861219b422e51ae86411051b46. The impacted element is the function authorized. The manipulation of the argument SECRET_KEY leads to missing authentication. The attack can be initiated remotely. The exploit has been disclosed to the public and may be used. Continious delivery with rolling releases is used by this product. Therefore, no version details of affected nor updated releases are available. The vendor was contacted early about this disclosure but did not respond in any way. This vulnerability only affects products that are no longer supported by the maintainer.

AnalysisAI

Authentication bypass in vvbbnn00's WARP-Clash-API allows unauthenticated remote attackers to circumvent the authorized function by manipulating the SECRET_KEY argument, gaining unauthorized access to the API's proxy configuration management functions. All versions up to commit c7bf2360073959861219b422e51ae86411051b46 are affected, and no patch exists because the maintainer has abandoned the project and did not respond to disclosure. …

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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata

Access
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Delivery
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Vulnerability AssessmentAI

Exploitation The WARP-Clash-API service must be reachable over the network (typically HTTP on a configured port). … Additional conditions and limiting factors are described in the full assessment.
Risk Assessment The CVSS 4.0 base score is 5.5 (Medium), with the E:P supplemental modifier reflecting the confirmed public proof-of-concept, which modestly adjusts the effective score downward from a raw 6.9 due to the constrained impact envelope (C:L/I:L/A:L). … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in.
Exploit Scenario Full exploit scenario with step-by-step reproduction available after sign-in.
Remediation No vendor-released patch exists and none is anticipated, as the maintainer is unresponsive and the product is officially end-of-life. … Detailed patch versions, workarounds, and compensating controls in full report.

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EUVD-2026-76977 vulnerability details – vuln.today

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