HIGH 7.5 NVD

CVE-2026-5680

A flaw was found in Undertow. A remote attacker could exploit this vulnerability by sending specially crafted WebSocket messages with permessage-deflate negotia

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.

References

https://access.redhat.com/security/cve/CVE-2026-5680
https://bugzilla.redhat.com/show_bug.cgi?id=2455350

Published: 2026-08-27 · Source: NVD · Feed updated: 2026-08-27

This high severity vulnerability with a CVSS score of 7.5 was published on 2026-08-27 via NVD.

vulnfeed aggregates 11337 vulnerabilities from NVD, CISA KEV, Ubuntu, Debian, Red Hat, Kubernetes, Exploit-DB, OSS-Security, GitHub and OpenStack — updated every 4 hours.