CVE-2026-15603

Katalog CVE

CVSS 5.3 · Medium EPSS 0,29%

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

Deskripsi (NVD)

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.

Rincian

Terbit di NVD

28 Agustus 2026

Terakhir diubah

31 Agustus 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)

0,29% peluang dieksploitasi; lebih tinggi dari 20,4% CVE lain

Produk dan versi terdampak

> Data dari konfigurasi CPE di NVD.

Referensi dan perbaikan

• https://github.com/expressjs/morgan/security/advisories/GHSA-jxfw-x594-9x9m advisory vendor
• https://cna.openjsf.org/security-advisories.html advisory pihak ketiga