CVE-2026-5078

Katalog CVE

CVSS 5.3 · Medium EPSS 0,42%

Kerentanan Improper Output Neutralization for Logs pada morgan project morgan. Skor CVSS 3.1 5.3 (Medium) menurut CNA.

Deskripsi (NVD)

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.

Rincian

Terbit di NVD

3 Juni 2026

Terakhir diubah

22 Juli 2026

Status NVD

Analyzed

CVSS 3.1

5.3 (Medium), sumber CNA
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N · uraikan di kalkulator

Jenis kelemahan (CWE)

CWE-117: Improper Output Neutralization for Logs

EPSS (30 hari)

0,42% peluang dieksploitasi; lebih tinggi dari 33,9% CVE lain

Produk dan versi terdampak

> Data dari konfigurasi CPE di NVD.

Referensi dan perbaikan

• https://github.com/expressjs/morgan/security/advisories/GHSA-4vj7-5mj6-jm8m mitigasi · advisory vendor
• https://cna.openjsf.org/security-advisories.html advisory pihak ketiga