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CVE Vulnerability Details :
CVE-2026-45673
PUBLISHED
More InfoOfficial Page
Assigner-GitHub_M
Assigner Org ID-a0819718-46f1-4df5-94e2-005712e83aaa
View Known Exploited Vulnerability (KEV) details
Published At-12 Jun, 2026 | 14:16
Updated At-12 Jun, 2026 | 16:05
Rejected At-
▼CVE Numbering Authority (CNA)
Netty: DNS Cache Poisoning due to Predictable PRNG and Default Static Source Port

Netty is a network application framework for development of protocol servers and clients. Prior to versions 4.1.135.Final and 4.2.15.Final, Netty's DNS resolver uses a predictable PRNG for generating DNS transaction IDs and defaults to a static UDP source port. This combination reduces the entropy of DNS queries, enabling DNS Cache Poisoning (Kaminsky attack). Versions 4.1.135.Final and 4.2.15.Final patch the issue.

Affected Products
Vendor
The Netty Projectnetty
Product
netty
Versions
Affected
  • >= 4.2.0.Final, < 4.2.15.Final
  • < 4.1.135.Final
Problem Types
TypeCWE IDDescription
CWECWE-330CWE-330: Use of Insufficiently Random Values
CWECWE-340CWE-340: Generation of Predictable Numbers or Identifiers
Type: CWE
CWE ID: CWE-330
Description: CWE-330: Use of Insufficiently Random Values
Type: CWE
CWE ID: CWE-340
Description: CWE-340: Generation of Predictable Numbers or Identifiers
Metrics
VersionBase scoreBase severityVector
3.16.8MEDIUM
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:H/A:N
Version: 3.1
Base score: 6.8
Base severity: MEDIUM
Vector:
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:H/A:N
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-xmv7-r254-6q78
x_refsource_CONFIRM
https://github.com/netty/netty/releases/tag/netty-4.1.135.Final
x_refsource_MISC
https://github.com/netty/netty/releases/tag/netty-4.2.15.Final
x_refsource_MISC
Hyperlink: https://github.com/netty/netty/security/advisories/GHSA-xmv7-r254-6q78
Resource:
x_refsource_CONFIRM
Hyperlink: https://github.com/netty/netty/releases/tag/netty-4.1.135.Final
Resource:
x_refsource_MISC
Hyperlink: https://github.com/netty/netty/releases/tag/netty-4.2.15.Final
Resource:
x_refsource_MISC
▼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
Details not found