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Blinko CVE-2026-23487

| EUVD-2026-14543 MEDIUM
Authorization Bypass Through User-Controlled Key (CWE-639)
2026-03-23 GitHub_M
Authentication Bypass Blinko
6.5
CVSS 3.1 · GitHub Advisory
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Severity by source

GitHub Advisory PRIMARY
6.5 MEDIUM
AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

Primary rating from GitHub Advisory · only source for this CVE.

CVSS VectorGitHub Advisory

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
None
Availability
None

Lifecycle Timeline

4
Patch available
Apr 16, 2026 - 05:29 EUVD
1.8.4
EUVD ID Assigned
Mar 23, 2026 - 21:00 euvd
EUVD-2026-14543
Analysis Generated
Mar 23, 2026 - 21:00 vuln.today
CVE Published
Mar 23, 2026 - 20:45 nvd
MEDIUM 6.5

DescriptionGitHub Advisory

Blinko is an AI-powered card note-taking project. Prior to version 1.8.4, there is an IDOR vulnerability where user.detail Endpoint Leaks the Superadmin Token. This issue has been patched in version 1.8.4.

AnalysisAI

An Insecure Direct Object Reference (IDOR) vulnerability in Blinko versions prior to 1.8.4 allows authenticated attackers to leak the superadmin token through the user.detail endpoint by manipulating user identifiers. This authentication bypass vulnerability has a CVSS score of 6.0 and affects the Blinko AI-powered note-taking application. …

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Vulnerability AssessmentAI

Risk Assessment While the CVSS score of 6.0 reflects medium severity, the real-world risk is elevated due to several compounding factors. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in.
Exploit Scenario An attacker with valid Blinko user credentials could systematically iterate through user identifiers in requests to the user.detail endpoint (e.g., /api/user.detail?id=1, /api/user.detail?id=2, etc.) and extract superadmin tokens from responses. Due to the High attack complexity, the attacker may need to identify the correct user ID format or discovery mechanism, but once successful, the leaked superadmin token provides complete administrative access to the entire Blinko instance, enabling data exfiltration, user account manipulation, and malicious configuration changes. …
Remediation Immediately upgrade Blinko to version 1.8.4 or later, which patches the IDOR vulnerability in the user.detail endpoint. … Detailed patch versions, workarounds, and compensating controls in full report.
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Within 30 days: Identify affected systems running Token. …

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CVE-2026-23487 vulnerability details – vuln.today
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