CVE-2026-33129

[CVE catalog]

Severity

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

Published

Mar 20, 2026, 9:41:21 AM UTC

Source

[NVD] · [CVE record]

EPSS

0.32% · Oct 25, 2026

A flaw was found in H3, a minimal HTTP framework. A remote attacker can exploit a Timing Side-Channel vulnerability in the `requireBasicAuth` function. This vulnerability arises from the use of an unsafe string comparison, allowing the attacker to deduce valid passwords character-by-character by measuring the server's response time. This effectively bypasses password complexity protections, leading to unauthorized access. Red Hat Product Security has determined that this vulnerability does not affect any currently supported Red Hat product. This assessment may evolve based on further analysis and discovery. For more information about this vulnerability and the products it affects, please see the linked references. The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.