CyberRota Analysis
AI-GeneratedVersions of the morgan HTTP request logger middleware for Node.js prior to 1.12.0 are vulnerable to log forging due to improper handling of Unicode line separator characters, allowing an unauthenticated remote client to manipulate log entries. This can lead to the creation of misleading log records, complicating incident response and forensic analysis. Users of morgan, particularly those relying on accurate logging for security monitoring, should prioritize upgrading to version 1.12.0 to mitigate this vulnerability.
Public Exploit Signal
A public exploit, PoC, GitHub repository or Metasploit reference was detected for this CVE.
Note: these links are listed for security research and verification purposes only.
Original NVD Description
morgan is an HTTP request logger middleware for Node.js. In versions prior to 1.12.0, the internal helper that escapes log token values did not neutralize the Unicode line separator characters U+0085 (Next Line), U+2028 (Line Separator), and U+2029 (Paragraph Separator). An unauthenticated remote client can place these characters in an attacker-controlled log token, for example a Basic auth username surfaced through the remote-user token, so that Unicode-aware downstream log processing splits a single request log into multiple logical records. This is a log forging issue (CWE-117) and an incomplete-fix follow-up to CVE-2026-5078, which only addressed ASCII control characters. The issue is fixed in morgan 1.12.0, which extends the escaping set to cover these Unicode line separators. Upgrade to morgan 1.12.0 to remediate.
Related CVEs
Other vulnerabilities affecting the same vendor(s)