CVE-2026-45674
Published: 12 June 2026
Summary
CVE-2026-45674 is a high-severity Insufficient Verification of Data Authenticity (CWE-345) vulnerability in Netty Netty. Its CVSS base score is 8.7 (High).
Operationally, ranked at the 12.2th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog.
OWASP Top 10 for Web (2025)
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2026-36450
Vulnerability details
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 DnsResolveContext fails to validate the origin (bailiwick) of CNAME records in DNS responses. Versions 4.1.135.Final and 4.2.15.Final patch the issue.
- CWE(s)
Related Threats
MITRE ATT&CK Enterprise TechniquesAI
Insufficient information to map techniques.Affected Assets
Mitigating Controls
Likely Mitigating Controls AI
Per-CVE control mapping for this CVE has not run yet; the list below is derived from the weakness types (CWEs) cited in the NVD entry.
Mandates provision of authenticity and integrity artifacts that enable verification of name/address resolution data.
Requires explicit verification of data authenticity from authoritative sources, preventing acceptance of unauthenticated resolution responses.
Requires unique identification of the service before communications, addressing failures to validate the origin of the interaction.
Directly requires independent verification of matching output before adverse decisions, mitigating insufficient authenticity checks on data from external sources.
Trusted path establishment enforces validation that the communication originates from and reaches only the intended trusted system components.
Use of approved PKI certificates provides verifiable data authenticity and origin for communications and artifacts.
Mandates origin validation so that only legitimate endpoints can continue the authenticated session.
Control requires verification of data authenticity/integrity (e.g., checksums) after aggregation/packing, directly reducing exploitation of insufficient verification before transmission.