CVE-2026-47784 Information disclosure in memcached
An attacker can exploit a timing side channel in SASL authentication to potentially recover password data from memcached.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-47784?
CVE-2026-47784 is a high-severity vulnerability in memcached, published on 20 May 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official 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.
Weakness: CWE-208
Which versions are affected by CVE-2026-47784?
1 open source package ship an affected version, including memcached. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
memcached Bitnami | All versions | 1.6.42 |
Linux distribution packages (3)
memcached Red Hat:hummingbird:1 | All versions | 0:1.6.42-0.1.hum1 |
memcached-devel Red Hat:hummingbird:1 | All versions | 0:1.6.42-0.1.hum1 |
memcached-selinux Red Hat:hummingbird:1 | All versions | 0:1.6.42-0.1.hum1 |
Products include Memcached Memcached.
How do I fix CVE-2026-47784?
Upgrade memcached to 1.6.42 or later.
Is CVE-2026-47784 being exploited?
There is no known exploitation of CVE-2026-47784 in the wild and no public exploit code.
Other vulnerabilities in memcached
Sources
Also known as AZL-87005, BIT-memcached-2026-47784, DEBIAN-CVE-2026-47784, GHSA-r4h3-4q3v-2776, MINI-56gj-c53w-xq59, MINI-cjxc-jwc7-rpvg and 2 more.