CVE-2026-55678

Arc is an open, SQL-native time-series database for telemetry. In Enterprise cluster deployments from v26.02.1 to v26.06.2 , the coordinator accepts cluster join requests without authentication when cluster.enabled=true but cluster.shared_secret is empty. The HMAC validation in coordinator.go is ...

CVE-2026-55678 Arc: Unauthenticated cluster node admission when `cluster.shared_secret` is unset

Arc is an open, SQL-native time-series database for telemetry. From 26.02.1 until 26.06.2, Arc Enterprise clustering accepts cluster join requests without authentication when cluster.enabled is true but cluster.sharedsecret is not configured. The defaults in internal/config/config.go set...

openSUSE 16 Security Update : tomcat (openSUSE-SU-2026:20611-1)

The remote openSUSE 16 host has packages installed that are affected by multiple vulnerabilities as referenced in the openSUSE-SU-2026:20611-1 advisory. - CVE-2026-24880: Request smuggling via invalid chunk extension bsc1261850. - CVE-2026-25854: Occasionally open redirect bsc1261851. -...

Improper Authorization

org.opendaylight.aaa : aaa-authn-api is vulnerable to Improper Authorization. The vulnerability is due to inadequate validation of cluster membership in OpenDaylight AAA, allowing a rogue controller to impersonate an offline peer even without complete cluster configuration information...

Troubleshooting thin provisioning for shared block storage on XenServer

XenServer and Citrix Hypervisor use GFS2 to provide the ability to set up thin provisioning with a shared block storage device. Pools that use GFS2 to thin provision their shared block storage are clustered and behave differently to pools that use shared file-based storage or LVM with shared bloc...

CentOS 5 : cman (CESA-2009:1341)

Updated cman packages that fix several security issues, various bugs, and add enhancements are now available for Red Hat Enterprise Linux 5. This update has been rated as having low security impact by the Red Hat Security Response Team. The Cluster Manager cman utility provides services for...