Source: undertow Version: 2.3.20-1 X-Debbugs-CC: [email protected] Severity: important Tags: security upstream
Hi, The following vulnerability was published for undertow. CVE-2026-5680[0]: | 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. If you fix the vulnerability please also make sure to include the CVE (Common Vulnerabilities & Exposures) id in your changelog entry. For further information see: [0] https://security-tracker.debian.org/tracker/CVE-2026-5680 https://www.cve.org/CVERecord?id=CVE-2026-5680 [1] https://bugzilla.redhat.com/show_bug.cgi?id=2455350 Regards, Salvatore
