CVE-2026-50009

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Source
https://cve.org/CVERecord?id=CVE-2026-50009
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-50009.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-50009
Aliases
Downstream
CGA (8)
CLEANSTART (2)
DEBIAN (1)
ECHO (1)
MINI (8)
UBUNTU (1)
Published
2026-06-12T14:47:09Z
Modified
2026-10-20T12:00:28Z
Severity
  • 4.8 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:L CVSS Calculator
Summary
Netty QUIC stateless reset token material exposed through header-visible connection IDs
Details

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.

Database specific 
{
    "cna_assigner":  "GitHub_M",
    "cwe_ids":  [
        "CWE-200",
        "CWE-330"
    ],
    "osv_generated_from":  "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/50xxx/CVE-2026-50009.json"
}
References

Affected packages

Git / github.com/netty/netty

Affected ranges

Type
GIT
Repo
https://github.com/netty/netty
Events
Introduced
09e64d259c99be8b5b2a471a78f11e65eb82598a
Fixed
a41f7b289ce1d697c50846f3ade3983e22b2ed40
Database specific
Show details 
{
    "extracted_events":  [
        {
            "introduced":  "4.2.0.Final"
        },
        {
            "fixed":  "4.2.15.Final"
        },
        {
            "cpe":  "cpe:2.3:a:netty:netty:*:*:*:*:*:*:*:*",
            "range":  [
                {
                    "introduced":  "4.2.0"
                },
                {
                    "fixed":  "4.2.15"
                }
            ],
            "source":  "CPE_RANGE"
        },
        {
            "original_tag":  "netty-4.2.15.Final",
            "range":  [
                {
                    "fixed":  "a41f7b289ce1d697c50846f3ade3983e22b2ed40"
                }
            ],
            "source":  "REFERENCES_TAG"
        }
    ],
    "source":  "AFFECTED_FIELD"
}

Affected versions

netty-4.*
netty-4.2.0.Final
netty-4.2.1.Final
netty-4.2.10.Final
netty-4.2.11.Final
netty-4.2.12.Final
netty-4.2.13.Final
netty-4.2.14.Final
netty-4.2.2.Final
netty-4.2.3.Final
netty-4.2.4.Final
netty-4.2.5.Final
netty-4.2.6.Final
netty-4.2.7.Final
netty-4.2.8.Final
netty-4.2.9.Final

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-50009.json"