CVE-2026-50009

MEDIUM EPSS 10.4%
Published Jun 12, 20262w ago · Modified Jun 17, 20261w ago
4.8 CVSS 3.1
Medium
Find Similar
Published Jun 12, 2026 2w ago
Last Modified Jun 17, 2026 1w ago

Description

Netty is a network application framework for development of protocol servers and clients. Prior to version 4.2.15.Final, Netty QUIC exposes the stateless reset token on the network path when using the default HMAC-based connection-ID and stateless-reset-token generators. The reset token for the server's current source connection ID can be derived from bytes that appear as the connection ID in QUIC headers after a source-CID rotation. An on-path attacker observing the headers can use the token to perform a Denial of Service by sending a spoofed Stateless Reset packet. Version 4.2.15.Final patches the issue.

CVSS Details

Base Score
4.8
Exploitability
2.2
Impact
2.5
Vector string
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:L
Attack Vector Network
Attack Complexity High
Privileges Required None
User Interaction None
Scope Unchanged
Confidentiality Low
Integrity None
Availability Low

Threat Intelligence

EPSS Exploit Probability
10.4% percentile
Exploit & Patch Status
No Known Exploit
No Patch Available

Weaknesses 2

CWE-200 Exposure of Sensitive Information to an Unauthorized Actor Information Exposure
CWE-330

Affected Products 1

VendorProductVersionRange
nettynetty*≥4.2.0  –  <4.2.15

References 2

  • github.com https://github.com/netty/netty/releases/tag/netty-4.2.15.Final
    Release Notes
  • github.com https://github.com/netty/netty/security/advisories/GHSA-cq4q-cv5g-r8q5
    Vendor Advisory

Remediation

No remediation data recorded yet

Check vendor advisories and the NVD entry for patch availability.