CVE-2022-31150Public exploitNetwork attack vector

HTTP request injection via unchecked control characters

Published Jul 19, 2022 · Updated Apr 22, 2025

CRLF injection in Undici before 5.8.0 allows remote attackers to inject HTTP headers through attacker-controlled request fields. The Request constructor and processHeader append path, method, header-name, and header-value input to the serialized request without rejecting CR or LF characters. Exploitation requires an application to pass remote input into one of those fields and permits manipulation of the outbound HTTP request.

CVSS severity5.3
Medium
EPSS probability1.43%
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 Undici before 5.8.0 allows remote attackers to inject HTTP headers through attacker-controlled request fields. The Request constructor and processHeader append path, method, header-name, and header-value input to the serialized request without rejecting CR or LF characters. Exploitation requires an application to pass remote input into one of those fields and permits manipulation of the outbound HTTP request.

The record

CVE
CVE-2022-31150
Published
Jul 19, 2022
Updated
Apr 22, 2025
Vendor
Node.js
Product
Undici
Classifications
CWE-93
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jul 19, 2022CVE publishedPublication date reported by the CVE source.
  2. Apr 22, 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=< v5.7.1, >= v5.8.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Node.js · Undiciversion=< v5.7.1, >= v5.8.0

Published CVSS scores

6.5NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
5.3GitHubCVSS:3.1/AV:N/AC:L/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 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 exploitPublished

Weakness, pattern, technique

CWE-93Improper Neutralization of CRLF Sequences ('CRLF 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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