{"id":"CVE-2026-47783","title":"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.","summary":"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.","severity":"high","cvss":8.1,"cvssVector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H","cwe":["CWE-208"],"vendor":"memcached","product":"memcached","affected":["memcached < 1.6.42"],"patched":["memcached 1.6.42"],"published":"2026-05-20","updated":"2026-09-18","sourceUpdated":"2026-09-18T13:18:29.257","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-47783","references":[{"url":"https://github.com/memcached/memcached/commit/d13f282b4bce33a9c33b8a1bbf07f12114160fed","label":"cve@mitre.org"},{"url":"https://github.com/memcached/memcached/compare/1.6.41...1.6.42","label":"cve@mitre.org"},{"url":"https://github.com/memcached/memcached/wiki/ReleaseNotes1642","label":"cve@mitre.org"},{"url":"https://access.redhat.com/errata/RHSA-2026:27842","label":"0b0ca135-0b70-47e7-9f44-1890c2a1c46c"},{"url":"https://access.redhat.com/errata/RHSA-2026:27862","label":"0b0ca135-0b70-47e7-9f44-1890c2a1c46c"},{"url":"https://access.redhat.com/security/cve/CVE-2026-47783","label":"0b0ca135-0b70-47e7-9f44-1890c2a1c46c"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2480089","label":"0b0ca135-0b70-47e7-9f44-1890c2a1c46c"},{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-47783.json","label":"0b0ca135-0b70-47e7-9f44-1890c2a1c46c"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-47783"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-47783"},{"url":"https://access.redhat.com/errata/RHSA-2026:63224"}],"tags":["nvd","cve.org","csaf","vex","red-hat"],"epss":0.01264,"epssPercentile":0.67925,"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"total","timestamp":"2026-05-20T12:49:50.253452Z"},"ingestedAt":"2026-09-18T12:40:48.889Z","slug":"CVE-2026-47783","body":"## Overview\n\nIn 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.\n\n## Affected\n\n- `memcached < 1.6.42`\n\n## Remediation\n\nUpgrade past the affected range:\n\n- `memcached 1.6.42`\n\n## Vendor advisories\n\n- **RHSA-2026:27842** · Red Hat · fixed in: Red Hat Enterprise Linux AppStream (v. 10) · released 2026-06-22 · [advisory](https://access.redhat.com/errata/RHSA-2026:27842)\n- **RHSA-2026:27862** · Red Hat · fixed in: Red Hat Enterprise Linux AppStream (v. 9) · released 2026-06-22 · [advisory](https://access.redhat.com/errata/RHSA-2026:27862)\n- **Red Hat VEX** · Important · affected: Red Hat Hardened Images · no fix planned: Red Hat Hardened Images · updated 2026-09-17 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-47783.json)\n- **RHSA-2026:63224** · Red Hat · fixed in: Red Hat Hardened Images · released 2026-09-03 · [advisory](https://access.redhat.com/errata/RHSA-2026:63224)","depth":"twilight","depthScore":45,"depthScoreParts":{"impact":44.6,"likelihood":0.3,"exploitation":0,"ransomware":0},"changes":[]}