CVE-2026-63446

high

Description

The vulnerability exists due to inefficient processing complexity inside the QUIC and HTTP/3 header validation engine. Crafting specialized packet sequences with massive arrays of pseudo-headers causes the regex or tokenization loops to experience exponential compute slowdowns.

Details

Source: Mitre, NVD

Published: 2026-07-23

Risk Information

CVSS v2

Base Score: 5

Vector: CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:P

Severity: Medium

CVSS v3

Base Score: 7.5

Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Severity: High