What is CVE-2026-47783?

CVE-2026-47783 is a high-severity vulnerability in Memcached, classified under CWE-208. CVSS score: 8.1/10. Published 2026-05-20.

How severe is CVE-2026-47783?

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

Vulnerability in Memcached

CVE-2026-47783

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.

EPSS: 0.001 (24.7th percentile) — read the EPSS interpretation.

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.

Affected products

Memcached — versions 0

Weakness classification (CWE)

CWE-208

References

cve@mitre.org (Patch)
cve@mitre.org (Release Notes)
cve@mitre.org (Release Notes)

Frequently asked questions

What is CVE-2026-47783?: CVE-2026-47783 is a high-severity vulnerability in Memcached, classified under CWE-208. CVSS score: 8.1/10. Published 2026-05-20.
How severe is CVE-2026-47783?: High severity. CVSS v3 base score is 8.1 out of 10.