CVE-2026-33129

Updated on 20 Mar 2026

Severity

5.9 Medium severity

Details

CVSS score
5.9
CVSS vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N

Overview

About vulnerability

H3 is a minimal H(TTP) framework. Versions 2.0.1-beta.0 through 2.0.0-rc.8 contain a Timing Side-Channel vulnerability in the requireBasicAuth function due to the use of unsafe string comparison (!==). This allows an attacker to deduce the valid password character-by-character by measuring the server’s response time, effectively bypassing password complexity protections. This issue is fixed in version 2.0.1-rc.9.

Details

Affected packages:
@vitejs/devtools @ 0.1.13 (+82 more)
H3 is a minimal H(TTP) framework. Versions 2.0.1-beta.0 through 2.0.0-rc.8 contain a Timing Side-Channel vulnerability in the requireBasicAuth function due to the use of unsafe string comparison (!==). This allows an attacker to deduce the valid password character-by-character by measuring the server’s response time, effectively bypassing password complexity protections. This issue is fixed in version 2.0.1-rc.9.