CVEvulnerability

CVE-2026-76166

4.3 MEDIUM Published 2026-08-19 Modified 2026-08-20 Official page ↗
Status
Awaiting Analysis
Published
2026-08-19
Last modified
2026-08-20
Assigner
[email protected]
CVSS 3.1 ([email protected])
4.3 MEDIUM — CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Weaknesses
CWE-476

Description

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.

Related

Weakness · CWE (1)

  • CWE-476 NULL Pointer Dereference weakness

References