CVE-2026-76166
CVE.org · Published
- Record status
- Published
- Identifier year (not publication year)
- 2026
- Source publication
- Source updated
- Imported by cveboard
- Source snapshot
- cve_2026-10-24_midnight_baseline ·
CNA source text (English)
Modcluster-core: mod_cluster advertise listener: unauthenticated dos via crafted multicast datagram
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.
Scoped product and version facts
Fix information unknown; no fixed version is derived here. Missing information does not prove that no fix exists.
Exploitation unknown; this catalogue does not assess exploitation.
Red Hat JBoss Enterprise Application Platform 7
- Vendor
- Red Hat
- Product
- Red Hat JBoss Enterprise Application Platform 7
- Platforms
- Unknown
- Default status
affected- Package
- mod_cluster-core
- Package collection
- https://access.redhat.com/jbossnetwork/restricted/listSoftware.html
No explicit version tuples; consult this entry's default status.
Red Hat JBoss Enterprise Application Platform 8
- Vendor
- Red Hat
- Product
- Red Hat JBoss Enterprise Application Platform 8
- Platforms
- Unknown
- Default status
affected- Package
- mod_cluster-core
- Package collection
- https://access.redhat.com/jbossnetwork/restricted/listSoftware.html
No explicit version tuples; consult this entry's default status.
Red Hat JBoss Enterprise Application Platform Expansion Pack
- Vendor
- Red Hat
- Product
- Red Hat JBoss Enterprise Application Platform Expansion Pack
- Platforms
- Unknown
- Default status
affected- Package
- mod_cluster-core
- Package collection
- https://access.redhat.com/jbossnetwork/restricted/listSoftware.html
No explicit version tuples; consult this entry's default status.
Red Hat JBoss Web Server 5
- Vendor
- Red Hat
- Product
- Red Hat JBoss Web Server 5
- Platforms
- Unknown
- Default status
unknown- Package
- mod_cluster-core
- Package collection
- https://access.redhat.com/jbossnetwork/restricted/listSoftware.html
No explicit version tuples; consult this entry's default status.
Red Hat JBoss Web Server 6
- Vendor
- Red Hat
- Product
- Red Hat JBoss Web Server 6
- Platforms
- Unknown
- Default status
affected- Package
- mod_cluster-core
- Package collection
- https://access.redhat.com/jbossnetwork/restricted/listSoftware.html
No explicit version tuples; consult this entry's default status.
Red Hat JBoss Web Server 7
- Vendor
- Red Hat
- Product
- Red Hat JBoss Web Server 7
- Platforms
- Unknown
- Default status
affected- Package
- mod_cluster-core
- Package collection
- https://access.redhat.com/jbossnetwork/restricted/listSoftware.html
No explicit version tuples; consult this entry's default status.
Red Hat Single Sign-On 7
- Vendor
- Red Hat
- Product
- Red Hat Single Sign-On 7
- Platforms
- Unknown
- Default status
affected- Package
- mod_cluster-core
- Package collection
- https://access.redhat.com/downloads/content/package-browser/
No explicit version tuples; consult this entry's default status.