CVE-2026-47784
HighCVSS 8.1Exploitation Probability (EPSS)
Low risk43th percentile - higher than 43% of all known CVEs
Summary
Memcached before version 1.6.42 uses the memcmp function for password comparison in SASL authentication, causing a timing side-channel vulnerability. An attacker can read passwords by measuring response times.
Risk Assessment
An attacker can recover user passwords, potentially leading to unauthorized system access.
Recommendation
Update Memcached to version 1.6.42 or later.
Other vulnerabilities in Memcached
See all- CVE-2017-9951High
The try_read_command function in memcached before version 1.4.39 allows remote attackers to cause a denial of service (segmentation fault) via a request to add/set a key, which makes a comparison between signed and unsigned int and triggers a heap-based buffer over-read.
- CVE-2016-8706High
An integer overflow in the process_bin_sasl_auth function in Memcached can be exploited to cause heap overflow and lead to remote code execution.
- CVE-2016-8705Critical
Multiple integer overflows in the process_bin_update function in Memcached can be exploited to cause heap overflow and lead to remote code execution.
- CVE-2016-8704Critical
An integer overflow in the process_bin_append_prepend function in Memcached can be exploited to cause heap overflow and lead to remote code execution.
- CVE-2026-47783High
In memcached before version 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.
Original NVD description (English source)
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.