How severe is CVE-2023-46853?

CVE-2023-46853 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2023-46853 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (51st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2023-46853?

CVE-2023-46853 affects Memcached. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2023-46853?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

When was CVE-2023-46853 published?

CVE-2023-46853 was published on 2023-10-27 and last updated on 2026-06-17.

CVE-2023-46853

CVE-2023-46853 is a critical-severity vulnerability in Memcached with a CVSS 3.x base score of 9.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-193.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
EPSS exploit prediction: 1% (51st percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-193
Affected product: Memcached
Published: 2023-10-27
Last modified: 2026-06-17

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.

Frequently asked questions

What is CVE-2023-46853?: 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.
How severe is CVE-2023-46853?: CVE-2023-46853 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2023-46853 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (51st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2023-46853?: CVE-2023-46853 affects Memcached. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2023-46853?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-2023-46853 published?: CVE-2023-46853 was published on 2023-10-27 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:memcached:memcached:*:*:*:*:*:*:*:*

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