node-morgan: Impact: The morgan logging middleware's :remote-user token extracts the Basic auth username from the Authorization re...
CVE-2026-5078 is fixed in node-morgan on 1 platform by DEBIAN-CVE-2026-5078 (version 1.12.0+~1.9.10-1), released June 3, 2026. It is not reported as exploited. Patch Radar priority: Routine.
Impact: The morgan logging middleware's :remote-user token extracts the Basic auth username from the Authorization request header and writes it to the log stream without neutralizing control characters. An unauthenticated attacker can send a crafted Authorization Basic header containing CR or LF bytes to inject forged log lines, breaking the one-request-per-line structure of access logs and enabling log forgery against downstream log consumers. The built-in combined, common, default, and short formats are affected, as well as any custom format that references :remote-user. Affected versions: morgan 1.2.0 through 1.10.1. Patches: upgrade to morgan 1.11.0, which neutralizes control characters in the :remote-user token output. Workarounds: use a custom format string that does not include :remote-user.
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Linux | |||
| node-morgan · Debian 14 | 1.12.0+~1.9.10-1 | DEBIAN-CVE-2026-5078 | Jun 3, 2026 |
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