What is CVE-2026-47784?

CVE-2026-47784 is a high-severity vulnerability in Memcached, classified under CWE-208. CVSS score: 8.1/10. Published 2026-05-20.

How severe is CVE-2026-47784?

High severity. CVSS v3 base score is 8.1 out of 10.

Vulnerability in Memcached

CVE-2026-47784

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.

Published 2026-05-20 · last modified 2026-07-24.

CVSS v3 metric

CVSS v3 base score 8.1 (High). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.005 (43.8th percentile), scored 2026-09-29.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 44th percentile — 43.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.005 · newest: 0.005 · change: 0.000

Affected products

Memcached — versions 0

Weakness classification (CWE)

CWE-208

References

github.com/memcached/memcached/commit/d13f282b4bce33a9c33b8a1bbf07f12114160fed (Patch)
github.com/memcached/memcached/compare/1.6.41...1.6.42 (Release Notes)
github.com/memcached/memcached/wiki/ReleaseNotes1642 (Release Notes)

Frequently asked questions

What is CVE-2026-47784?: CVE-2026-47784 is a high-severity vulnerability in Memcached, classified under CWE-208. CVSS score: 8.1/10. Published 2026-05-20.
How severe is CVE-2026-47784?: High severity. CVSS v3 base score is 8.1 out of 10.