# CVE-2026-47783

## Summary

- **CVE ID:** CVE-2026-47783
- **Severity:** HIGH
- **CVSS Score:** 8.1 (CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H)
- **CWE:** CWE-208
- **Published:** May 20, 2026
- **Last Modified:** Aug 17, 2026

## 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 (0)

## References

- [CNA](https://github.com/memcached/memcached/commit/d13f282b4bce33a9c33b8a1bbf07f12114160fed)
- [CNA](https://github.com/memcached/memcached/compare/1.6.41...1.6.42)
- [CNA](https://github.com/memcached/memcached/wiki/ReleaseNotes1642)
- [redhat-SADP](https://access.redhat.com/security/cve/CVE-2026-47783)
- [redhat-SADP](https://bugzilla.redhat.com/show_bug.cgi?id=2480089)
- [redhat-SADP](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-47783.json)
- [redhat-SADP](https://access.redhat.com/errata/RHSA-2026:27842)
- [redhat-SADP](https://access.redhat.com/errata/RHSA-2026:27862)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 1.26%
- **EPSS Percentile:** 67.9

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-11._