Dashboard / CVE-2026-44435

CVE-2026-44435

HIGH
MEDIUM Priority: 0.04 BB Relevance: 75/100
Published: 2026-07-16 Modified: 2026-10-24 First seen: 2026-10-29 Status: active

Attack Surface

Network Low Complexity No Auth No Interaction

CVSS Vector Breakdown

AV: Network
AC: Low
PR: None
UI: None
S: Unchanged
C: None
I: None
A: High

Description

Quicly is an IETF QUIC protocol implementation intended primarily for use within the H2O HTTP server. Prior to commit 937d0e9, an assertion failure is raised when the total number of valid handshake messages received over a CRYPTO stream of a single packet number space exceeds 32KB, causing a Denial of Service. This issue has been fixed by commit 937d0e9.

Weakness Classification (2)

Affected Software (1)

VendorProductVersion
h2o quicly < 2026-05-29

References & Advisories (2)

Bug Bounty Relevance

75 / 100
✓ Network accessible
✓ No authentication
✓ Low complexity
✓ No user interaction

CVSS Score

7.5 / 10.0 v3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

EPSS — Exploitation Probability

0.49%
Raw Score 0.004880
Percentile 41.9%
Date 2026-10-29

EPSS Trend

2026-10-29
0.00488
2026-10-28
0.00488

Intelligence Sources

nvd ref →

External Links