CVE-2023-46852: In Memcached before 1.6.22, a buffer overflow exists when processing multiget requests in proxy mode, if there

Q: How do I fix CVE-2023-46852?

memcached: upgrade to 1.6.22. Exact commands for each OS are on this page.

Q: Is CVE-2023-46852 being exploited?

CVE-2023-46852 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2023-46852 affect?

CVE-2023-46852 affects memcached. Severity is high (CVSS 7.5). In Memcached before 1.6.22, a buffer overflow exists when processing multiget requests in proxy mode, if there are many spaces after the "get" substring.

Q: How urgent is CVE-2023-46852?

Priority 46/100. High severity; Remotely exploitable, no login, no user action

This month

HIGH 7.5REMOTEUPGRADE

CVE-2023-46852 is a high-severity flaw (CVSS 7.5) affecting memcached. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

In Memcached before 1.6.22, a buffer overflow exists when processing multiget requests in proxy mode, if there are many spaces after the "get" substring.

Why this priority

High severity
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	7.5 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.9% (top 40%)
CISA exploited list	No
Weakness	CWE-120
Published	2023-10-27
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: memcached

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2023-10-27 20:15 UTCPublished CVE record published
2026-06-17 06:31 UTCUpdated Record last modified

memcached memcached UPGRADE

Affected: < 1.6.22

Fixed in: 1.6.22

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy memcached || rpm -q memcached || memcached --version

2. UPGRADE to 1.6.22 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade memcached

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade memcached

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2023-46852?

memcached: upgrade to 1.6.22. Exact commands for each OS are on this page.

Is CVE-2023-46852 being exploited?

CVE-2023-46852 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2023-46852 affect?

CVE-2023-46852 affects memcached. Severity is high (CVSS 7.5). In Memcached before 1.6.22, a buffer overflow exists when processing multiget requests in proxy mode, if there are many spaces after the "get" substring.

How urgent is CVE-2023-46852?

Priority 46/100. High severity; Remotely exploitable, no login, no user action

Software pages

Memcached vulnerabilities

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CVE-2022-26635 CRITICAL 9.8 UPGRADE PHP-Memcached v2.2.0 and below contains an improper NULL termination which allows attackers to execute CLRF in
CVE-2021-37519 MEDIUM 5.5 DOWNGRADE Buffer Overflow vulnerability in authfile.c memcached 1.6.9 allows attackers to cause a denial of service via
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References

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