What’s Vulnerable › Vulnerabilities

CVE-2023-27478: Disclosure of unrelated data in libmemcached-awesome

• Severity: medium (CVSS 6.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.7% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2023-03-07 · updated 2026-06-17
• Weakness: CWE-200

Description

libmemcached-awesome is an open source C/C++ client library and tools for the memcached server. `libmemcached` could return data for a previously requested key, if that previous request timed out due to a low `POLL_TIMEOUT`. This issue has been addressed in version 1.1.4. Users are advised to upgrade. There are several ways to workaround or lower the probability of this bug affecting a given deployment. 1: use a reasonably high `POLL_TIMEOUT` setting, like the default. 2: use separate libmemcached connections for unrelated data. 3: do not re-use libmemcached connections in an unknown state.

Affected products

• awesomized libmemcached: from 1.0.18 before 1.1.4 — fixed in 1.1.4

How to fix

Upgrade to a fixed version: awesomized libmemcached 1.1.4. Check the vendor advisory for mitigations.

References

• https://github.com/awesomized/libmemcached/commit/48dcc61a
• https://github.com/awesomized/libmemcached/releases/tag/1.1.4
• https://github.com/awesomized/libmemcached/security/advisories/GHSA-wwmh-39wj-fx59
• https://github.com/php-memcached-dev/php-memcached/issues/531
• https://github.com/awesomized/libmemcached/commit/48dcc61a
• https://github.com/awesomized/libmemcached/releases/tag/1.1.4
• https://github.com/awesomized/libmemcached/security/advisories/GHSA-wwmh-39wj-fx59
• https://github.com/php-memcached-dev/php-memcached/issues/531

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