CVE Watch20 ago 2026

CVE-2026-76166

A flaw was found in mod_cluster's AdvertiseListenerImpl (org.jboss.modcluster core module). A single crafted UDP multicast datagram with a v

CVSS

4.3

Medio

EPSS

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KEV

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Exploit Today

0-100

Publicado: 19 ago 2026 · Última mod.: 20 ago 2026 · CWE-476

EPSS · 30d

Sin historial EPSS suficiente todavía.

Descripción técnica

A flaw was found in mod_cluster's AdvertiseListenerImpl (org.jboss.modcluster core module). A single crafted UDP multicast datagram with a valid HTTP status line and a "Server:" header but without the "Date:", "Digest:", and "Sequence:" headers triggers a NullPointerException in verifyDigest() that is not caught by the worker thread's exception handler. This causes the advertise listener thread to terminate permanently. The failure is silent (isListening() continues to return true) and persists until the node is restarted. The crash occurs before the AdvertiseSecurityKey comparison, so deployments with a configured security key are still affected.

Referencias oficiales

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