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CVE-2026-50009

Netty QUIC stateless reset token material exposed through header-visible connection IDs

Published: Jun 12, 2026Updated: Jun 15, 2026 Sources: CVE List NVDCWE-200
4.8MEDIUM
NVD MITRE
EPSS Score
0.2%
Top 89.6%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available

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.

No summary for this CVE yet.

CVSS Vector Breakdown

AV:NAC:HPR:NUI:NS:UC:LI:NA:L
Exploitability
AV:NAttack Vector
Network
AC:HAttack Complexity
High
PR:NPrivileges Required
None
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:LConfidentiality
Low
I:NIntegrity
None
A:LAvailability
Low
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Weaknesses

CWE-200CWE-330

Affected Products

netty
oss-projectaka io.netty:netty, netty-incubator-codec-ohttp
nettyLibraryLibrary
OSS Libraries / generic-library

Exploitability

Official Patch Available

Attack Graph

Products CVE Techniques Tactics

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MITRE ATT&CK

2 techniques
Collection
Credential Access
View detailed technique mapping

References

https://github.com/netty/netty/security/advisories/GHSA-cq4q-cv5g-r8q5
github.com
https://github.com/netty/netty/releases/tag/netty-4.2.15.Final
github.com
News mentions
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