CVE-2026-117183 in astro-notion-blog
Summary
by MITRE • 10/30/2026
A path traversal vulnerability in the FeaturedImage component of astro-notion-blog 0.13.0 allows attackers to escape the intended directory, as well as read and overwrite files on the server via a crafted URL.
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Analysis
by VulDB Data Team • 10/30/2026
The identified security flaw resides within the FeaturedImage component of the astro-notion-blog software version 0.13.0, representing a critical path traversal vulnerability that compromises the integrity and confidentiality of the underlying file system. This type of vulnerability typically arises when an application processes user-supplied input without adequately sanitizing or validating directory separators such as dot-dot-slash sequences. In this specific context, the component fails to properly restrict access to files located outside its designated root directory, allowing malicious actors to manipulate the requested resource path through crafted URLs. By injecting relative navigation characters into the request parameters, an attacker can bypass intended security boundaries and traverse up the directory tree from the expected location of image assets to arbitrary locations on the server's file system.
The operational impact of this vulnerability is severe due to its dual nature involving both unauthorized data access and potential code execution or configuration tampering through file overwriting. Attackers who exploit this flaw can read sensitive files that may contain database credentials, API keys, environment variables, or other confidential information stored in directories above the web root. Furthermore, if the application permits write operations based on user input without sufficient validation, an attacker could overwrite critical system files, configuration scripts, or even inject malicious content into existing assets. This capability can lead to full server compromise, defacement of the website, or further lateral movement within a networked environment depending on the privileges under which the web service operates.
From a classification perspective, this vulnerability aligns with CWE-22: Improper Limitation of a Pathname to a Restricted Directory, which describes flaws where software does not properly neutralize special elements that can cause paths to traverse outside of intended directories. Additionally, the exploitation technique maps directly to MITRE ATT&CK tactic TA0006: Credential Access and potentially TA0005: Defense Evasion if used for persistence or obfuscation, specifically under techniques related to File and Directory Discovery. The ability to overwrite files also touches upon integrity violations that can facilitate further attacks such as remote code execution if executable scripts are targeted.
Mitigation strategies must focus on rigorous input validation and strict path canonicalization within the FeaturedImage component developers should ensure that all file paths requested by users are resolved to their absolute physical paths before any access is granted. The application logic must verify that the resulting canonical path remains strictly within the allowed base directory, rejecting any request where traversal attempts result in a path outside this boundary. Implementing allowlists for permitted file extensions and avoiding dynamic construction of file paths from unsanitized user input are essential preventive measures. Additionally, deploying web application firewalls with rulesets designed to detect common path traversal patterns can provide an additional layer of defense while the underlying code is patched. Regular security audits and static analysis tools configured to flag improper path handling should be integrated into the development lifecycle to prevent similar vulnerabilities in future releases.