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.
Published · last modified .
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: 0.013 (68.5th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 69th percentile — 68.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.013 · newest: 0.013 · change: 0.000
Affected products
- Memcached — versions 0
Weakness classification (CWE)
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)
- 0b0ca135-0b70-47e7-9f44-1890c2a1c46c
- 0b0ca135-0b70-47e7-9f44-1890c2a1c46c
- 0b0ca135-0b70-47e7-9f44-1890c2a1c46c
- 0b0ca135-0b70-47e7-9f44-1890c2a1c46c
- 0b0ca135-0b70-47e7-9f44-1890c2a1c46c
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.