CVE-2026-5680

CVE CVE-2026-5680EUVD EUVD-2026-67086Published 2026-08-27T16:25:29.000ZLast changed 2026-09-01T17:39:58.000ZCVSS 7.5

What the advisory describes

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.

Source: EUVD (ENISA), in the words of the advisory.

Products the advisory names

These come from the advisory itself, not from any check we performed.

• Red Hat — Red Hat Data Grid 8
• Red Hat — Red Hat Enterprise Linux 10
• Red Hat — Red Hat Enterprise Linux 8
• Red Hat — Red Hat Enterprise Linux 9
• Red Hat — Red Hat Fuse 7
• Red Hat — Red Hat JBoss Enterprise Application Platform 7
• Red Hat — Red Hat JBoss Enterprise Application Platform 8
• Red Hat — Red Hat JBoss Enterprise Application Platform Expansion Pack
• Red Hat — Red Hat Process Automation 7
• Red Hat — Red Hat Single Sign-On 7
• Red Hat — Red Hat build of Apache Camel - HawtIO 4
• Red Hat — Red Hat build of Apache Camel for Spring Boot 4

The versions shown are the advisory's own. Patchlage compares no version numbers and derives no judgement from them — which version is installed is something a person has to look up.

Carried in the product catalogue

An estate covering these products can be recorded in Patchlage. An advisory about them appears in the next morning's situation report.

• Red Hat — Red Hat Enterprise Linux
• Red Hat — Red Hat JBoss Enterprise Application Platform

Patchlage reports hits and suspected hits. About everything else this system says nothing — neither this page nor the situation report ever claims that an estate is safe.