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CVE Vulnerability Details :
CVE-2026-42583
PUBLISHED
More InfoOfficial Page
Assigner-GitHub_M
Assigner Org ID-a0819718-46f1-4df5-94e2-005712e83aaa
View Known Exploited Vulnerability (KEV) details
Published At-13 May, 2026 | 18:09
Updated At-14 May, 2026 | 15:41
Rejected At-
▼CVE Numbering Authority (CNA)
Netty: Lz4FrameDecoder resource exhaustion

Netty is an asynchronous, event-driven network application framework. Prior to 4.2.13.Final and 4.1.133.Final, Lz4FrameDecoder allocates a ByteBuf of size decompressedLength (up to 32 MB per block) before LZ4 runs. A peer only needs a 21-byte header plus compressedLength payload bytes - 22 bytes if compressedLength == 1 - to force that allocation. This vulnerability is fixed in 4.2.13.Final and 4.1.133.Final.

Affected Products
Vendor
The Netty Projectnetty
Product
netty
Versions
Affected
  • >= 4.2.0.Alpha1, < 4.2.13.Final
  • < 4.1.133.Final
Vendor
io.netty
Product
netty-codec
Versions
Affected
  • < 4.1.133.Final
Vendor
io.netty
Product
netty-codec-compression
Versions
Affected
  • < 4.2.13.Final
Problem Types
TypeCWE IDDescription
CWECWE-400CWE-400: Uncontrolled Resource Consumption
CWECWE-770CWE-770: Allocation of Resources Without Limits or Throttling
Type: CWE
CWE ID: CWE-400
Description: CWE-400: Uncontrolled Resource Consumption
Type: CWE
CWE ID: CWE-770
Description: CWE-770: Allocation of Resources Without Limits or Throttling
Metrics
VersionBase scoreBase severityVector
3.17.5HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Version: 3.1
Base score: 7.5
Base severity: HIGH
Vector:
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Metrics Other Info
Impacts
CAPEC IDDescription
Solutions
Configurations
Workarounds
Exploits
Credits
Timeline
EventDate
Replaced By
Rejected Reason
References
HyperlinkResource
https://github.com/netty/netty/security/advisories/GHSA-mj4r-2hfc-f8p6
x_refsource_CONFIRM
Hyperlink: https://github.com/netty/netty/security/advisories/GHSA-mj4r-2hfc-f8p6
Resource:
x_refsource_CONFIRM
▼Authorized Data Publishers (ADP)
CISA ADP Vulnrichment
Affected Products
Metrics
VersionBase scoreBase severityVector
Metrics Other Info
Impacts
CAPEC IDDescription
Solutions
Configurations
Workarounds
Exploits
Credits
Timeline
EventDate
Replaced By
Rejected Reason
References
HyperlinkResource
https://github.com/netty/netty/security/advisories/GHSA-mj4r-2hfc-f8p6
exploit
Hyperlink: https://github.com/netty/netty/security/advisories/GHSA-mj4r-2hfc-f8p6
Resource:
exploit
Details not found