Vulnerability · Published May 20, 2026 · Assigned by mitre
CVE-2026-47784
High 8.1
In plain English
A high-severity security flaw in memcached from memcached. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.5% (higher than 46% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS 3.1)8.1High
Exploit odds (30 days)0.5%top 53.8% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
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.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:12 | memcached | 1.6.18-1+deb12u1 | DEBIAN-CVE-2026-47784 |
| Debian:13 | memcached | no fix listed | DEBIAN-CVE-2026-47784 |
| Debian:14 | memcached | 1.6.42-1 | DEBIAN-CVE-2026-47784 |
| Ubuntu:22.04:LTS | memcached | 1.6.14-1ubuntu0.2 | UBUNTU-CVE-2026-47784 |
| Ubuntu:24.04:LTS | memcached | 1.6.24-1ubuntu0.1 | UBUNTU-CVE-2026-47784 |
| Ubuntu:25.10 | memcached | 1.6.38-1ubuntu0.1 | UBUNTU-CVE-2026-47784 |
| Ubuntu:26.04:LTS | memcached | 1.6.40-1ubuntu0.1 | UBUNTU-CVE-2026-47784 |
Affected products (as reported)
Weakness: CWE-208 · Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H