Memcached · Memcached · CVE-2026-47783
**Name of the Vulnerable Software and Affected Versions**
memcached versions prior to 1.6.42
**Description**
Username data for SASL password database authentication contains a timing side channel. This occurs because the `sasl server userdb checkpass()` function utilizes a loop that terminates immediately upon finding a valid username, allowing an attacker to potentially infer valid usernames based on the time the server takes to respond.
**Recommendations**
Update to version 1.6.42 or later.