CVE-2022-41720Network attack vector

Restricted file disclosure via Windows path handling

Published Dec 7, 2022 · Updated Apr 23, 2025

Path traversal in Go standard library os and net/http on Windows before 1.18.9 and 1.19.0 through 1.19.3 allows remote attackers to read files. DirFS and http.Dir accept reserved device names beneath a nominal root, while drive-root DirFS paths can escape that root through crafted input. Exposure requires a Windows application to pass attacker-controlled paths to these APIs; access is read-only but can reach restricted device files or any file on the system.

CVSS severity7.5
High
EPSS probability1.20%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Path traversal in Go standard library os and net/http on Windows before 1.18.9 and 1.19.0 through 1.19.3 allows remote attackers to read files. DirFS and http.Dir accept reserved device names beneath a nominal root, while drive-root DirFS paths can escape that root through crafted input. Exposure requires a Windows application to pass attacker-controlled paths to these APIs; access is read-only but can reach restricted device files or any file on the system.

The record

CVE
CVE-2022-41720
Published
Dec 7, 2022
Updated
Apr 23, 2025
Vendor
Go standard library
Product
net/http
Classifications
CWE-22, T1005
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Dec 7, 2022CVE publishedPublication date reported by the CVE source.
  2. Apr 23, 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=0 <1.18.9
  2. Affected versionversion=1.19.0-0 <1.19.4

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Go standard library · net/httpversion=0 <1.18.9; version=1.19.0-0 <1.19.4
Go standard library · osversion=0 <1.18.9; version=1.19.0-0 <1.19.4

Published CVSS scores

7.5NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/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 exploitUnconfirmed

Weakness, pattern, technique

CWE-22Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
T1005Data from Local System

Public exploit references

No public exploit references are available in this record.

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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