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.
History

Wed, 20 May 2026 13:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}


Wed, 20 May 2026 08:15:00 +0000

Type Values Removed Values Added
Title Timing Side‑Channel in SASL Username Lookup Causes Username Enumeration in Memcached

Wed, 20 May 2026 06:30:00 +0000

Type Values Removed Values Added
Description 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.
First Time appeared Memcached
Memcached memcached
Weaknesses CWE-208
CPEs cpe:2.3:a:memcached:memcached:*:*:*:*:*:*:*:*
Vendors & Products Memcached
Memcached memcached
References
Metrics cvssV3_1

{'score': 8.1, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H'}


cve-icon MITRE

Status: PUBLISHED

Assigner: mitre

Published:

Updated: 2026-05-20T12:49:58.195Z

Reserved: 2026-05-20T05:43:46.363Z

Link: CVE-2026-47783

cve-icon Vulnrichment

Updated: 2026-05-20T12:49:54.179Z

cve-icon NVD

Status : Analyzed

Published: 2026-05-20T07:16:15.533

Modified: 2026-05-21T17:06:40.670

Link: CVE-2026-47783

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-05-20T08:00:11Z