CVE-2026-47784
Memcached Timing-Attack in SASL Password Database Authentication
Description
In memcached before 1.6.42, password data for SASL password database authentication has a timing side channel because memcmp is used by sasl_server_userdb_checkpass.
INFO
Published Date :
May 20, 2026, 7:16 a.m.
Last Modified :
May 21, 2026, 5:06 p.m.
Remotely Exploit :
Yes !
Source :
[email protected]
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | HIGH | 8254265b-2729-46b6-b9e3-3dfca2d5bfca | ||||
| CVSS 3.1 | HIGH | [email protected] |
Solution
- Update memcached to version 1.6.42 or later.
- Apply vendor-provided patches if available.
- Review SASL authentication configuration.
Public PoC/Exploit Available at Github
CVE-2026-47784 has a 1 public
PoC/Exploit available at Github.
Go to the Public Exploits tab to see the list.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-47784.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-47784 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-47784
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
DSA and DLA for Debian last 14 days
Python
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-47784 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-47784 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
Initial Analysis by [email protected]
May. 21, 2026
Action Type Old Value New Value Added CPE Configuration OR *cpe:2.3:a:memcached:memcached:*:*:*:*:*:*:*:* versions up to (excluding) 1.6.42 Added Reference Type MITRE: https://github.com/memcached/memcached/commit/d13f282b4bce33a9c33b8a1bbf07f12114160fed Types: Patch Added Reference Type MITRE: https://github.com/memcached/memcached/compare/1.6.41...1.6.42 Types: Release Notes Added Reference Type MITRE: https://github.com/memcached/memcached/wiki/ReleaseNotes1642 Types: Release Notes -
New CVE Received by [email protected]
May. 20, 2026
Action Type Old Value New Value Added Description In memcached before 1.6.42, password data for SASL password database authentication has a timing side channel because memcmp is used by sasl_server_userdb_checkpass. Added CVSS V3.1 AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H Added CWE CWE-208 Added Reference https://github.com/memcached/memcached/commit/d13f282b4bce33a9c33b8a1bbf07f12114160fed Added Reference https://github.com/memcached/memcached/compare/1.6.41...1.6.42 Added Reference https://github.com/memcached/memcached/wiki/ReleaseNotes1642