CVE-2026-47783CWE-208

CVE-2026-47783

High · published May 20, 2026

CVSS v3.1

8.1

EPSS

Percentile

69.5

In the wild

Unconfirmed

What it is

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.

The record

Technical detail

CVSS v3.1: 8.1 · HIGH
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS v4.0: Not supplied
EPSS: 0.01264 · 69.5th percentile
Weakness: CWE-208 · Observable Timing Discrepancy
Published: 2026-05-20T11:16Z

Affected products (1)

Product	Versions	Fixed in
memcached/memcached	< 1.6.42	1.6.42

References (8)

https://github.com/memcached/memcached/commit/d13f282b4bce33a9c33b8a1bbf07f12114160fed · [email protected]https://github.com/memcached/memcached/compare/1.6.41...1.6.42 · [email protected]https://github.com/memcached/memcached/wiki/ReleaseNotes1642 · [email protected]https://access.redhat.com/errata/RHSA-2026:27842 · 0b0ca135-0b70-47e7-9f44-1890c2a1c46c https://access.redhat.com/errata/RHSA-2026:27862 · 0b0ca135-0b70-47e7-9f44-1890c2a1c46c https://access.redhat.com/security/cve/CVE-2026-47783 · 0b0ca135-0b70-47e7-9f44-1890c2a1c46c https://bugzilla.redhat.com/show_bug.cgi?id=2480089 · 0b0ca135-0b70-47e7-9f44-1890c2a1c46c https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-47783.json · 0b0ca135-0b70-47e7-9f44-1890c2a1c46c

EPSS history

Timeline

20 MAY 05:43Z
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…
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