CVE-2026-47783: Memcached

High severity, CVSS 8.1. EPSS: 1.3% chance of exploitation in the next 30 days.

In memcached before 1.6.42, username data for SASL password database authentication has a timing side channel because a loop exits as soon as a valid username is found by sasl_server_userdb_checkpass.

Affected products

• Memcached Memcached: before 1.6.42 (fixed in 1.6.42)

Published 2026-05-20. Last modified 2026-09-18.