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.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| morgan | morgan | < 1.12.0 | 1.12.0 |
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | node-morgan | 1.12.0+~1.9.10-1 | — |
| Debian 13 | node-morgan | No fix yet | — |
| Debian 12 | node-morgan | No fix yet | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 26.10 | node-morgan | No fix yet | — |
| Ubuntu 26.04 LTS | node-morgan | No fix yet | — |
| Ubuntu 24.04 LTS | node-morgan | No fix yet | — |
| Ubuntu 22.04 LTS | node-morgan | No fix yet | — |
Affected packages
| Ecosystem | Package | Affected | Fixed | Record |
|---|---|---|---|---|
| npm | morgan | < 1.12.0 | 1.12.0 | GHSA-jxfw-x594-9x9m |