CVE-2026-44433: quicly before 2026-05-29 (exclusive), < 8b178e6

CVE-2026-44433. CVSS 3.1 base score 7.5 (HIGH, NVD). EPSS 0.00488 (percentile 0.41129), scored 24-Oct-2026.

Affected technology

quicly · before 2026-05-29 (exclusive)
h2o

quicly · < 8b178e6
h2o

Component: Not specified by the source

Attack conditions (Vendor/CNA, CVSS 3.1): Network (remote) · No privileges required · No user interaction required

Attack conditions (NVD, CVSS 3.1): Network (remote) · No privileges required · No user interaction required

What an attacker can do

The source reports that an attacker could disrupt service under the conditions described by the source. Vendor/CNA’s CVSS 3.1 assessment (base score 5.3/10) rates confidentiality and integrity impact as none; availability impact as low. NVD’s CVSS 3.1 assessment (base score 7.5/10) rates confidentiality and integrity impact as none; availability impact as high.

Published 25-Oct-2026 01:30 UTC

CWE: CWE-400, CWE-770
CCR priority: 30.1 /100 (P4)
CVSS 3.1: 7.5 /10 · CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H · NVD
EPSS: 0.00488 · percentile 0.41129 · 2026-10-24
KEV: no

Provenance

NVD CVE API 2.0 · Source record · observed 2026-10-25 01:28:19.133527+00:00 UTC

Stable permalink: https://cybercodered.org/item/cve-cve-2026-44433.html