CVE-2026-47783
Medium
Elevated severity or exploit probability.
CVSS base
8.1
HIGH
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS — probability of exploitation (30 days)
1.3%
68.4th percentile
CISA KEV
Not listed
Weakness / dates
CWE-208
Published 2026-05-20 · modified 2026-09-18
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.
Affected
References
- https://github.com/memcached/memcached/commit/d13f282b4bce33a9c33b8a1bbf07f12114160fed
- https://github.com/memcached/memcached/compare/1.6.41...1.6.42
- https://github.com/memcached/memcached/wiki/ReleaseNotes1642
- https://access.redhat.com/errata/RHSA-2026:27842
- https://access.redhat.com/errata/RHSA-2026:27862
- https://access.redhat.com/security/cve/CVE-2026-47783
- https://bugzilla.redhat.com/show_bug.cgi?id=2480089
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-47783.json