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 products
memcached: memcached
References8
- github.com/memcached/memcached/commit/d13f282b4bce33a9c33b8a1bb… Patch
- github.com/memcached/memcached/compare/1.6.41...1.6.42 Release Notes
- github.com/memcached/memcached/wiki/ReleaseNotes1642 Release Notes
- access.redhat.com/errata/RHSA-2026:27842
- access.redhat.com/errata/RHSA-2026:27862
- access.redhat.com/security/cve/CVE-2026-47783
- bugzilla.redhat.com/show_bug.cgi?id=2480089
- security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-47783…
Metrics
- CVSS 3.1
-
8.1
HIGH
Score source: CNA
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H - EPSS — exploit probability
- 1% percentile: 70 · as of 14 November 2026
- CWE
- CWE-208
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