Use of incorrect operator in envoy - CVE-2026-48497
Published: June 24, 2026
Vulnerability identifier: #VU135118
CSH Severity: Medium
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2026-48497
CWE-ID: CWE-480
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: Cloud Native Computing Foundation
Affected software:
envoy
envoy
Detailed vulnerability description
The vulnerability allows a remote attacker to cause a denial of service.
The vulnerability exists due to use of incorrect operator in DNS UDP filter when processing a DNS query containing a name 255 octets long. A remote attacker can send a specially crafted DNS query to cause a denial of service.
Exploitation requires that the DNS filter successfully resolve the queried name.
How to mitigate CVE-2026-48497
Install security update from vendor's website.