---
cve: "CVE-2026-47783"
severity: "HIGH"
cvss: 8.1
epss: "1.3%"
vendor: "Memcached"
kev: false
exploited: false
published: "2026-05-20 07:16:15"
tags: [cve, security, high]
source: tsecurity.de CVE-Dossier
exported: "2026-09-13T12:03:51+02:00"
---

# CVE-2026-47783

> 8.1 HIGH · 🧪 PoC

## Beschreibung

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-Vektor

```
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
```

| Metrik | Wert | Bewertung |
|---|---|---|
| AV Angriffsvektor | Netzwerk | bad |
| AC Komplexität | Hoch | good |
| PR Privilegien | Keine | bad |
| UI Interaktion | Keine | bad |
| S Scope | Unverändert | good |
| C Vertraulichkeit | Hoch | bad |
| I Integrität | Hoch | bad |
| A Verfügbarkeit | Hoch | bad |

## Patch verfügbar (OSV)

- f1674f0231e5d291db474c4ad297f5f069d32521 (Commit)
- d13f282b4bce33a9c33b8a1bbf07f12114160fed (Commit)

## Referenzen

- <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>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-47783) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_