CVE-2026-5680
HIGH
NVD
CVSS Score
7.5
Severity
HIGH
Published
Aug 27, 2026
Vendor
unknown
Description
A flaw was found in Undertow. A remote attacker could exploit this vulnerability by sending specially crafted WebSocket messages with permessage-deflate negotiated. This could lead to excessive memory consumption due to the PerMessageDeflateFunction.largerBuffer() method using exponential doubling, resulting in a Denial of Service (DoS) for the affected application.