CVE-2022-4064Public exploitNetwork attack vector

Memcached command injection via unsanitized meta arguments

Published Nov 19, 2022 · Updated Apr 15, 2025

Code injection in Dalli 3.2.0 through 3.2.2 allows remote attackers to alter memcached data through crafted Meta Protocol arguments. RequestFormatter appends CAS values and flush delays to raw text commands without numeric validation, so newline-delimited input becomes another memcached command. A consuming application must let untrusted input reach one of those arguments; injected commands can then modify cached data.

CVSS severity6.3
Medium
EPSS probability1.32%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Code injection in Dalli 3.2.0 through 3.2.2 allows remote attackers to alter memcached data through crafted Meta Protocol arguments. RequestFormatter appends CAS values and flush delays to raw text commands without numeric validation, so newline-delimited input becomes another memcached command. A consuming application must let untrusted input reach one of those arguments; injected commands can then modify cached data.

The record

CVE
CVE-2022-4064
Published
Nov 19, 2022
Updated
Apr 15, 2025
Vendor
Dalli Project
Product
Dalli
Classifications
CWE-74
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Nov 19, 2022CVE publishedPublication date reported by the CVE source.
  2. Apr 15, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=3.2.0
  2. Affected versionversion=3.2.1
  3. Affected versionversion=3.2.2

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Dalli Project · Dalliversion=3.2.0; version=3.2.1; version=3.2.2

Published CVSS scores

2.6VulDBAV:N/AC:H/Au:N/C:N/I:P/A:N
3.7NVDCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N
6.3VulDBCVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N
3.7VulDBCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-74Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection')

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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