CVE-2019-11495: Couchbase Server

Critical severity, CVSS 9.8. EPSS: 2.1% chance of exploitation in the next 30 days.

In Couchbase Server 5.1.1, the cookie used for intra-node communication was not generated securely. Couchbase Server uses erlang:now() to seed the PRNG which results in a small search space for potential random seeds that could then be used to brute force the cookie and execute code against a remote system. This has been fixed in version 6.0.0.

Affected products

• Couchbase Couchbase Server: version 5.1.1 only

Published 2019-09-10. Last modified 2026-06-17.