CVE-2026-50638Network attack vector

Metric injection via unvalidated tag control characters

Published Jun 10, 2026 · Updated Jun 10, 2026

CRLF injection in Metrics::Any::Adapter::DogStatsd before 0.04 allows attackers to inject arbitrary metrics through crafted tags. The _tags function accepts newline and StatsD control characters in untrusted tag content instead of replacing or rejecting them. Exploitation requires an application to pass attacker-controlled tags, allowing forged monitoring data to reach a DogStatsd receiver.

CVSS severity9.1
Critical
EPSS probability0.34%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

CRLF injection in Metrics::Any::Adapter::DogStatsd before 0.04 allows attackers to inject arbitrary metrics through crafted tags. The _tags function accepts newline and StatsD control characters in untrusted tag content instead of replacing or rejecting them. Exploitation requires an application to pass attacker-controlled tags, allowing forged monitoring data to reach a DogStatsd receiver.

The record

CVE
CVE-2026-50638
Published
Jun 10, 2026
Updated
Jun 10, 2026
Vendor
Paul Evans
Product
Metrics::Any::Adapter::DogStatsd
Classifications
CWE-93, CWE-150, T1565.002
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jun 10, 2026CVE publishedPublication date reported by the CVE source.
  2. Jun 10, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

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  1. Affected versionversion=0 <0.04

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Paul Evans · Metrics::Any::Adapter::DogStatsdversion=0 <0.04

Published CVSS scores

9.1CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-93Improper Neutralization of CRLF Sequences ('CRLF Injection')
CWE-150Improper Neutralization of Escape, Meta, or Control Sequences
T1565.002Transmitted Data Manipulation

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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