CVE-2026-42580

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Source
https://cve.org/CVERecord?id=CVE-2026-42580
Import Source
https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-42580.json
JSON Data
https://api.test.osv.dev/v1/vulns/CVE-2026-42580
Aliases
Downstream
Related
Published
2026-05-13T18:04:03.690Z
Modified
2026-05-20T04:03:09.618250716Z
Severity
  • 6.5 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L CVSS Calculator
Summary
Netty: HTTP Request Smuggling due to incorrect chunk size parsing
Details

Netty is an asynchronous, event-driven network application framework. Prior to 4.2.13.Final and 4.1.133.Final, Netty's chunk size parser silently overflows int, enabling request smuggling attacks. This vulnerability is fixed in 4.2.13.Final and 4.1.133.Final.

Database specific 
{
    "cna_assigner": "GitHub_M",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/42xxx/CVE-2026-42580.json",
    "cwe_ids": [
        "CWE-190",
        "CWE-444"
    ]
}
References

Affected packages

Git / github.com/netty/netty

Affected ranges

Type
GIT
Repo
https://github.com/netty/netty
Events
Introduced
5451fbb0effd8460f57013bb33aefeb953144ed9
Fixed
fb13125f135ab53203513ff603872a3abe84d38d

Database specific

source 
"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-42580.json"