Critical Memcached SASL Vulnerability Let Attackers Infer Valid Usernames

Cybersecuritynews •Abinaya • May 26, 2026

A newly disclosed security issue in Memcached has raised concerns after developers confirmed a timing side-channel vulnerability in its SASL authentication mechanism that could allow attackers to infer valid usernames, now tracked as CVE‑2026‑47783. The flaw was addressed in the recently released Memcached version 1.6.42, a security-focused update that fixes multiple critical bugs affecting stability […]

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Memcached SASL Vulnerability Allows Username Enumeration Attacks A timing side-channel vulnerability in Memcached's SASL authentication mechanism, tracked as CVE-2026-47783, has been disclosed. This flaw affects versions prior to 1.6.42 and enables attackers to enumerate valid usernames. The vulnerability was confirmed by researchers and poses a significant risk to systems using Memcached for password database authentication. The flaw was addressed in the latest release, which includes multiple critical bug fixes. Security professionals are urged to update their systems to mitigate potential exploitation. The vulnerability was published on May 20, 2026. 3 sources 58

Extracted Entities

Critical Memcached SASL Vulnerability Let Attackers Infer Valid Usernames

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Extracted Entities

Attack Types (1)

CWE Weaknesses (1)

Platforms (1)