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TI-2022-20256 Aliases CVE-2022-41915GHSA-hh82-3pmq-7frp

HTTP response splitting in netty

Priority HIGH 68CWE-113Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
—
Confidentiality · integrity · availability
Low · Low · None
Fix status
Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA and GitHub.

Summary

Netty project is an event-driven asynchronous network application framework. Starting in version 4.1.83.Final and prior to 4.1.86.Final, when calling `DefaultHttpHeadesr.set` with an _iterator_ of values, header value validation was not performed, allowing malicious header values in the iterator to perform HTTP Response Splitting. This issue has been patched in version 4.1.86.Final. Integrators can work around the issue by changing the `DefaultHttpHeaders.set(CharSequence, Iterator<?>)` call, into a `remove()` call, and call `add()` in a loop over the iterator of values.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00952 61st percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix Fixed netty (netty): 4.1.86.Finalio.netty:netty-codec-http (Maven): 4.1.86.Final

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
Yes
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
nettynetty4.1.86.Final to before 4.1.86.Final; 4.1.83.Final and later4.1.86.FinalPatch availableCNA
—io.netty:netty-codec-http (Maven)4.1.83.Final to before 4.1.86.Final4.1.86.FinalPatch availableGHSA-hh82-3pmq-7frp
  • netty Vendornetty Affected 4.1.86.Final to before 4.1.86.Final; 4.1.83.Final and later Fixed in 4.1.86.Final Patch available CNA
  • io.netty:netty-codec-http (Maven) Vendor— Affected 4.1.83.Final to before 4.1.86.Final Fixed in 4.1.86.Final Patch available GHSA-hh82-3pmq-7frp

CPE configurations NVD · 3

CPEVersionsRoleVendor
cpe:2.3:a:netty:netty:*:*:*:*:*:*:*:*4.1.83 to before 4.1.86Vulnerablenetty
cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*10.0VulnerableDebian
cpe:2.3:o:debian:debian_linux:11.0:*:*:*:*:*:*:*11.0VulnerableDebian
  • cpe:2.3:a:netty:netty:*:*:*:*:*:*:*:* Versions 4.1.83 to before 4.1.86 Vulnerable ·netty
  • cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:* Versions 10.0 Vulnerable ·Debian
  • cpe:2.3:o:debian:debian_linux:11.0:*:*:*:*:*:*:* Versions 11.0 Vulnerable ·Debian

Remediation

  • Fix · CNA netty (netty) Fixed in 4.1.86.Final
  • Fix · GHSA-hh82-3pmq-7frp io.netty:netty-codec-http (Maven) Fixed in 4.1.86.Final Advisory →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2022-41915
  2. 2026-10-03 Alias added: GHSA-hh82-3pmq-7frp

References

Exploit 1

Patch 2

Advisory 5

Other 3

  • TI-2023-23979 The HTTP/2 protocol allows a denial of service (server resource consumption) because… KEVCVSS 3.1HIGH 7.5
  • TI-2026-30861 Netty: HTTP/1.0 TE+CL Coexistence Bypasses Smuggling Sanitization CVSS 3.1CRITICAL 9.8
  • TI-2026-30864 Netty: HttpClientCodec response desynchronization CVSS 3.1CRITICAL 9.1
  • TI-2026-30859 Netty: DNS Codec Input Validation Bypass in Netty (Encoder + Decoder) CVSS 3.1CRITICAL 9.1
  • TI-2026-40973 Netty: Missing CertificateID Validation in OCSP Response Allows Replay Attacks CVSS 3.1CRITICAL 9.1
  • TI-2026-40972 Uncontrolled resource consumption in netty CVSS 3.1HIGH 7.5
See all 92 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences