CVE-2026-47783

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.

Score

CVSS 3.1 8.1 High

Status

Modified - cve@mitre.org

Published

2026-05-20

Last modified

2026-09-18

Weaknesses

CWE-208

Affected products

• Memcached (Memcached)
• Enterprise Linux (Redhat)
• Hummingbird (Redhat)

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