CVE-2026-47783

high

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.

References

https://github.com/memcached/memcached/wiki/ReleaseNotes1642

https://github.com/memcached/memcached/compare/1.6.41...1.6.42

https://github.com/memcached/memcached/commit/d13f282b4bce33a9c33b8a1bbf07f12114160fed

Details

Source: Mitre, NVD

Published: 2026-05-20

Updated: 2026-05-21

Risk Information

CVSS v2

Base Score: 7.6

Vector: CVSS2#AV:N/AC:H/Au:N/C:C/I:C/A:C

Severity: High

CVSS v3

Base Score: 8.1

Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H