Cyber Resilience

CVE-2026-47783

HighUpdated

Published: 20 May 2026

Published
20 May 2026
Modified
30 June 2026
KEV Added
—
Patch
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CVSS Score v3.1 8.1 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS Score 0.0131 67.2th percentile
Risk Priority 55 floored blend · peak EPSS

Summary

CVE-2026-47783 is a high-severity Observable Timing Discrepancy (CWE-208) vulnerability in Memcached Memcached. Its CVSS base score is 8.1 (High).

Operationally, exploitation aligns with the MITRE ATT&CK technique Brute Force (T1110); ranked in the top 32.8% of CVEs by exploit likelihood; it is not currently listed in the CISA KEV catalog.

EU & UK References

Vulnerability details

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.

CWE(s)
CWE-208

Related Threats

MITRE ATT&CK Enterprise TechniquesAI

T1110 Brute Force Credential Access
Adversaries may use brute force techniques to gain access to accounts when passwords are unknown or when password hashes are obtained.
attack.mitre.org →
Why these techniques?

Timing side-channel enables valid username enumeration as a direct precursor to password guessing/brute force against the SASL auth mechanism.

Confidence: MEDIUM · MITRE ATT&CK Enterprise v19.0

CVEs Like This One

CVE-2026-47784Same product: Memcached Memcached
CVE-2026-5086Shared CWE-208
CVE-2026-40972Shared CWE-208
CVE-2024-42512Shared CWE-208
CVE-2026-47373Shared CWE-208
CVE-2025-68621Shared CWE-208
CVE-2025-70949Shared CWE-208
CVE-2024-13939Shared CWE-208
CVE-2026-28464Shared CWE-208
CVE-2025-48630Shared CWE-208

Affected Assets

memcached
memcached
≤ 1.6.42

Mitigating Controls

Likely Mitigating Controls AI

Per-CVE control mapping for this CVE has not run yet; the list below is derived from the weakness types (CWEs) cited in the NVD entry.

SC-30 Concealment and Misdirection
addresses: CWE-208

Timing randomization or delays can mask true operation timing and mislead timing-based attacks.

SC-31 Covert Channel Analysis
addresses: CWE-208

Observable timing discrepancies are a primary mechanism for constructing covert timing channels; analysis identifies and bounds them, limiting exploitation.

References