CVE-2026-27480

Katalog CVE

CVSS 5.3 · Medium EPSS 0,43%

Kerentanan Observable Response Discrepancy pada static-web-server static web server. Skor CVSS 3.1 5.3 (Medium) menurut github.com.

Deskripsi (NVD)

Static Web Server (SWS) is a production-ready web server suitable for static web files or assets. In versions 2.1.0 through 2.40.1, a timing-based username enumeration vulnerability in Basic Authentication allows attackers to identify valid users by exploiting early responses for invalid usernames, enabling targeted brute-force or credential-stuffing attacks. SWS checks whether a username exists before verifying the password, causing valid usernames to follow a slower code path (e.g., bcrypt hashing) while invalid usernames receive an immediate 401 response. This timing discrepancy allows attackers to enumerate valid accounts by measuring response-time differences. This issue has been fixed in version 2.41.0.

Rincian

Terbit di NVD

21 Februari 2026

Terakhir diubah

17 Juni 2026

Status NVD

Analyzed

CVSS 3.1

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

Jenis kelemahan (CWE)

CWE-204: Observable Response Discrepancy

EPSS (30 hari)

0,43% peluang dieksploitasi; lebih tinggi dari 35,9% CVE lain

Produk dan versi terdampak

> Data dari konfigurasi CPE di NVD.

Referensi dan perbaikan

• https://github.com/static-web-server/static-web-server/security/advisories/GHSA-qhp6-635j-x7r2 exploit · advisory vendor
• https://github.com/static-web-server/static-web-server/commit/7bf0fd425eb10dac9bf9ef5febce12c4dd039ce1 patch