What’s Vulnerable › Vulnerabilities

CVE-2023-46853

• Severity: critical (CVSS 9.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.8% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2023-10-27 · updated 2026-06-17
• Weakness: CWE-193

Description

In Memcached before 1.6.22, an off-by-one error exists when processing proxy requests in proxy mode, if \n is used instead of \r\n.

Affected products

• Memcached: before 1.6.22 — fixed in 1.6.22

How to fix

Upgrade to a fixed version: Memcached 1.6.22. Check the vendor advisory for mitigations.

References

• https://github.com/memcached/memcached/commit/6987918e9a3094ec4fc8976f01f769f624d790fa
• https://github.com/memcached/memcached/compare/1.6.21...1.6.22
• https://github.com/memcached/memcached/commit/6987918e9a3094ec4fc8976f01f769f624d790fa
• https://github.com/memcached/memcached/compare/1.6.21...1.6.22

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