VulnerabilityModified
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.
HIGH 8.1EPSS 1.26%
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (1.26%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
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.
- CVSS 3.1
- 8.1 HIGHCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 1.26% probability · 68th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-208
- Affected
- memcached/memcached
- Source
- cve@mitre.org
References
- https://github.com/memcached/memcached/commit/d13f282b4bce33a9c33b8a1bbf07f12114160fedPatch
- https://github.com/memcached/memcached/compare/1.6.41...1.6.42Release Notes
- https://github.com/memcached/memcached/wiki/ReleaseNotes1642Release Notes
- 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
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.