CVE-2026-47783
memcached: memcached: Username enumeration via timing side channel
Severity
ImportantRed Hat Product Security
CVSS 3.1
Review impact separately from score.
Published · May 20, 2026
Updated · September 21, 2026
Description
A flaw was found in memcached. A remote attacker can exploit a timing side channel during Simple Authentication and Security Layer (SASL) password database authentication. This vulnerability allows an attacker to observe subtle timing differences, which could be used to enumerate valid usernames.
CVSS score applicability
The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.
Mitigation
No mitigation is specified in collected source.
CVSS / CWE
CVSS 3.1 · 8.1CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
CWE-208 · Observable Timing Discrepancy