CVE-2022-1705Public exploitNetwork attack vector

Request smuggling via CR-stripped Transfer-Encoding value

Published Aug 9, 2022 · Updated Mar 6, 2026

HTTP request smuggling in Go net/http before 1.17.12 and 1.18.0 through 1.18.3 allows remote attackers to desynchronize requests. The transferReader.parseTransferEncoding path trims surrounding whitespace and therefore treats a carriage-return-prefixed "chunked" value as valid. Exploitation requires an intermediate server that also accepts the invalid header, allowing inconsistent request-boundary interpretation.

CVSS severity6.5
Medium
EPSS probability1.37%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

HTTP request smuggling in Go net/http before 1.17.12 and 1.18.0 through 1.18.3 allows remote attackers to desynchronize requests. The transferReader.parseTransferEncoding path trims surrounding whitespace and therefore treats a carriage-return-prefixed "chunked" value as valid. Exploitation requires an intermediate server that also accepts the invalid header, allowing inconsistent request-boundary interpretation.

The record

CVE
CVE-2022-1705
Published
Aug 9, 2022
Updated
Mar 6, 2026
Vendor
Go standard library
Product
net/http
Classifications
CWE-444, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 9, 2022CVE publishedPublication date reported by the CVE source.
  2. Mar 6, 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?

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

  1. Affected versionversion=0 <1.17.12
  2. Affected versionversion=1.18.0-0 <1.18.4

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Go standard library · net/httpversion=0 <1.17.12; version=1.18.0-0 <1.18.4

Published CVSS scores

6.5CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
6.5NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/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-444Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling')
T1190Exploit Public-Facing Application

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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