EUVD-2026-14544Vulnerability Assessment
| Weakness |
CWE
OWASP Top 10:2025
A01:2025 - Broken Access Control
ASVS 5.0
V8 - Authorization Object-level authorization, IDOR prevention
|
| Impact | This vulnerability presents a moderate to high real-world risk despite the medium-high CVSS score of 6.9. The CVSS vector (AV:N/AC:L/AT:N/PR:N/UI:N) confirms network accessibility, low attack complexity, and no privileges required, indicating trivial exploitability. The vulnerability is not listed in the CISA KEV catalog based on available intelligence, suggesting no active exploitation in the wild at the time of analysis. However, the straightforward nature of the attack (unauthenticated API calls with no complexity) and the sensitivity of the data at risk (private notes and comments) make this a practical attack vector. SSVC considerations: exploitation is straightforward (automatable), the technical impact is high (unauthorized access to confidential information stored in private notes), and the human-initiated technical impact is significant. Organizations using Blinko for sensitive note-taking should prioritize patching immediately. |
| Exploit ScenarioDerived | An attacker could enumerate note IDs within a target Blinko instance and, without authentication, send POST requests to /api/v1/comment/create with arbitrary comment content, successfully posting comments to private notes. The attacker could simultaneously query /api/v1/comment/list to view all existing comments across the entire note repository, exposing sensitive information such as private research notes, confidential project discussions, or personal information contained within comments. No special tools or complex exploitation techniques are required; basic HTTP requests are sufficient, making this vulnerability practical for opportunistic attacks or reconnaissance. |
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Alert meAnalysisAIv1 – Mar 23, 2026
Blinko, an AI-powered card note-taking application, contains an authentication bypass vulnerability in its comment management endpoints that allows unauthenticated attackers to create and view comments on any note, including private notes that have not been publicly shared. Versions prior to 1.8.4 are vulnerable, and a patch has been released and is available via the official GitHub repository. The vulnerability has a CVSS 4.0 score of 6.9 with a network attack vector requiring no privileges or user interaction, making it trivial to exploit.
RemediationAI
Upgrade Blinko immediately to version 1.8.4 or later, which contains the authorization bypass fixes. The patch commit (4623dd02bdeed768ffa6fea4cc2f8644cbb08c5e) is available in the repository and can be verified via https://github.com/blinkospace/blinko/commit/4623dd02bdeed768ffa6fea4cc2f8644cbb08c5e. If an immediate upgrade is not feasible, restrict network access to the Blinko API endpoints to trusted internal networks only and consider implementing a reverse proxy with request authentication enforcement. Additionally, audit logs for the /api/v1/comment/create and /api/v1/comment/list endpoints in affected versions to identify any unauthorized comment activity that may have occurred.
Affected VersionsENISA
Affected Packages
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.
Technical ContextAI · show details
The vulnerability exists in two API endpoints of the Blinko application (cpe:2.3:a:blinkospace:blinko:*:*:*:*:*:*:*:*): the /api/v1/comment/create and /api/v1/comment/list endpoints. These endpoints fail to properly enforce access control checks before processing requests, resulting in a CWE-639 (Authorization Bypass Through User-Controlled Key) vulnerability. The root cause is insufficient authorization validation; the application does not verify that the authenticated user (or lack thereof) has permission to interact with comments on a given note before returning data or creating new records. This is a classic broken access control issue where the API trusts client requests without server-side authorization checks.
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Severity by source
AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
Primary rating from GitHub Advisory · only source for this CVE.
CVSS VectorGitHub Advisory
Lifecycle Timeline
2DescriptionGitHub Advisory
Blinko is an AI-powered card note-taking project. Prior to version 1.8.4, the /api/v1/comment/create endpoint has an unauthorized access vulnerability, allowing attackers to post comments on any note (including private notes) without authorization, even if the note has not been publicly shared. The /api/v1/comment/list endpoint has the same issue, allowing unauthorized viewing of comments on all notes. This issue has been patched in version 1.8.4.
Executive ViewAI
Organizations using Blinko should be aware of moderate risk from CVE-2026-23488, a IDOR vulnerability rated CVSS 5.3. Exploitation could compromise the security of affected deployments. Organizations should apply vendor updates when available and monitor for exploitation.
Apply vendor patch. If patching is delayed: restrict network access and enable monitoring.
Threat Intelligence Overview
NVD
CVE.org
EPSS
Vulnrichment
GitHub
VulDB
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.
What every action level means
SSVC AssessmentENISA
Priority Score
Attack Technique
Authentication bypass attacks exploit flaws in the verification mechanisms that control access to systems and applications.
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