EUVD-2026-14535Vulnerability Assessment
| Weakness |
CWE
OWASP Top 10:2025
A01:2025 - Broken Access Control
ASVS 5.0
V5 - File Handling Path canonicalization, traversal prevention
MITRE ATT&CK
2 techniques across 2 tactics: Discovery, Collection The technique list with ATT&CK links and the kill-chain view is part of the Basic plan and up. |
| Impact | While a formal CVSS score and EPSS probability are not provided, this vulnerability carries significant real-world risk. The attack vector is network-based (accessible via HTTP requests to the plugin endpoint), requires no authentication, and has low complexity—an attacker needs only to craft a URI with traversal sequences. The technical impact is severe: arbitrary file read access can expose sensitive configuration files, private keys, source code, and user data. The absence of a public patch at the time of disclosure is a critical risk signal, meaning all deployed instances remain vulnerable indefinitely without vendor action. The fact that no CVSS/EPSS was assigned does not diminish the threat; rather, it suggests the vulnerability may have been reserved or delayed in publication. KEV status is unknown from the provided data, but the simplicity of exploitation (no special tools required) and the high impact (information disclosure) classify this as a high-priority vulnerability regardless of CVSS metrics. |
| Exploit ScenarioDerived | An attacker on the network sends an HTTP GET request to the Blinko plugin endpoint with a crafted path such as '/plugins/../../../../../../etc/passwd' or uses URL-encoded traversal sequences to bypass simple string matching. The vulnerable endpoint joins this attacker-controlled path with the base plugins directory using join() without validation, resolving to an absolute path outside the plugins directory. The server then reads and returns the requested file (e.g., /etc/passwd, application configuration files, or private keys) directly in the HTTP response. No authentication is required, and the attack can be automated to enumerate the filesystem and exfiltrate sensitive data. |
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Alert meAnalysisAIv1 – Mar 23, 2026
Blinko versions 1.8.3 and earlier contain a path traversal vulnerability in the plugin file server endpoint that fails to validate whether requested file paths remain within the plugins directory, enabling unauthenticated remote attackers to read arbitrary files. The vulnerability has a CVSS score of 5.3 and currently lacks a publicly available patch.
Earlier versions of this analysis (1)
A path traversal vulnerability exists in Blinko versions 1.8.3 and prior affecting the plugin file server endpoint, where the join() function concatenates paths without validating that the final path remains within the plugins directory. This allows attackers to read arbitrary files from the system by crafting malicious requests with directory traversal sequences. No public patches are currently available, and the vulnerability is classified as CWE-22 (Improper Limitation of a Pathname to a Restricted Directory).
RemediationAI
At the time of publication, no official patch is available from the vendor. The primary remediation is to monitor the GitHub Security Advisory (https://github.com/blinkospace/blinko/security/advisories/GHSA-54c7-9gxh-fg9v) for patch availability and upgrade immediately upon release. In the interim, implement network-level mitigations by restricting access to the Blinko instance using firewall rules or network segmentation to limit exposure to trusted internal networks only. Additionally, disable or restrict the plugin file server endpoint if it is not essential to operations, and consider running Blinko in an isolated environment with minimal filesystem permissions. Monitor filesystem access logs for suspicious activity patterns consistent with path traversal attempts (repeated '../' sequences in HTTP request logs).
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
Blinko is an AI-powered card note-taking application (CPE: cpe:2.3:a:blinkospace:blinko:*:*:*:*:*:*:*:*) that includes a plugin file server endpoint. The vulnerability stems from improper path canonicalization in the path concatenation logic, which is a classic instance of CWE-22. The endpoint uses the join() function to combine user-supplied input with the base plugins directory path, but fails to perform post-join validation or canonicalization checks (such as realpath() or Path normalization) to ensure the resolved path remains within the intended plugins directory. This allows attackers to inject path traversal sequences like '../' to escape the plugins directory and access arbitrary files on the filesystem. The root cause reflects a common security antipattern where input validation occurs before normalization, allowing encoded or unusual traversal sequences to bypass 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
DescriptionGitHub Advisory
Blinko is an AI-powered card note-taking project. In versions from 1.8.3 and prior, the plugin file server endpoint uses join() to concatenate paths but does not verify if the final path is within the plugins directory, leading to path traversal. At time of publication, there are no publicly available patches.
Executive ViewAI
Organizations using Blinko should be aware of moderate risk from CVE-2026-23483, a path traversal vulnerability rated CVSS 5.3. This could allow unauthorized file access. Organizations should apply vendor updates when available and monitor for exploitation.
Apply vendor patch. If patching is delayed: restrict file access via WAF, implement allowlists.
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
Path traversal exploits occur when applications use user-controlled input to construct file system paths without proper validation.
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