Improper Validation of Specified Index, Position, or Offset in Input in dnsjava - #VU162705
Published: November 9, 2026
Vulnerability identifier: #VU162705
CSH Severity: Medium
CVSS v4: 6.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N]
CVE-ID: N/A
CWE-ID: CWE-1285
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows an unauthenticated remote attacker to crash the calling thread or task of a DNS lookup in applications using dnsjava.
The vulnerability exists due to incorrect indexing during default response normalization when unrelated answer record sets precede a multi-record CNAME set, causing an uncaught exception. An unauthenticated remote attacker can control an authoritative DNS server and return a crafted response to a lookup for their domain to trigger this failure.
Affected software
dnsjava
Remediation
Install security update from vendor's website.
dnsjava - update to 3.7.0