CVE-2026-0669
Description
A flaw was found in the MediaWiki CSS extension. This vulnerability, categorized as a Path Traversal, allows a remote attacker to access restricted directories. By manipulating file paths, an attacker can read arbitrary files on the server, potentially leading to the disclosure of sensitive information.
Statement
This vulnerability is rated Moderate for Red Hat as it affects MediaWiki, a web application that, if deployed, could allow an unauthenticated attacker to perform path traversal. This could lead to unauthorized access to sensitive files on the server where MediaWiki is hosted.
Mitigation
To reduce the attack surface, restrict network access to the MediaWiki instance to only trusted clients or internal networks using firewall rules. For example, using `firewalld`, you can limit access to the web server port (e.g., 80 or 443) from specific source IP addresses or zones. This may impact legitimate users if not configured carefully.
Understanding the Weakness (CWE)
Integrity,Confidentiality,Availability
Technical Impact: Execute Unauthorized Code or Commands
The attacker may be able to create or overwrite critical files that are used to execute code, such as programs or libraries.
Integrity
Technical Impact: Modify Files or Directories
The attacker may be able to overwrite or create critical files, such as programs, libraries, or important data. If the targeted file is used for a security mechanism, then the attacker may be able to bypass that mechanism. For example, appending a new account at the end of a password file may allow an attacker to bypass authentication.
Confidentiality
Technical Impact: Read Files or Directories
The attacker may be able read the contents of unexpected files and expose sensitive data. If the targeted file is used for a security mechanism, then the attacker may be able to bypass that mechanism. For example, by reading a password file, the attacker could conduct brute force password guessing attacks in order to break into an account on the system.
Availability
Technical Impact: DoS: Crash, Exit, or Restart
The attacker may be able to overwrite, delete, or corrupt unexpected critical files such as programs, libraries, or important data. This may prevent the product from working at all and in the case of protection mechanisms such as authentication, it has the potential to lock out product users.
Frequently Asked Questions
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