CVE-2023-29402

Code injection via newline-split cgo directives

Published Jun 8, 2023 · Updated Feb 13, 2025

Code injection in the Go command before 1.19.10 and 1.20.0 through 1.20.4 allows attackers to inject code when building untrusted cgo modules. cmd/cgo places unescaped source paths in //line directives; a newline in a directory name terminates the directive and injects Go tokens into generated source. Exploitation requires cgo and an untrusted module already present on disk, including GOPATH mode; modules obtained with go get are unaffected.

CVSS severity9.8
Critical
EPSS probability1.69%
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 the Go command before 1.19.10 and 1.20.0 through 1.20.4 allows attackers to inject code when building untrusted cgo modules. cmd/cgo places unescaped source paths in //line directives; a newline in a directory name terminates the directive and injects Go tokens into generated source. Exploitation requires cgo and an untrusted module already present on disk, including GOPATH mode; modules obtained with go get are unaffected.

The record

CVE
CVE-2023-29402
Published
Jun 8, 2023
Updated
Feb 13, 2025
Vendor
Google Cloud
Product
Go command
Classifications
CWE-94, T1195.001
Attack vector
local
Privileges
Unavailable

Timeline

How it unfolded

  1. Jun 8, 2023CVE publishedPublication date reported by the CVE source.
  2. Feb 13, 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 <1.19.10
  2. Affected versionversion=1.20.0-0 <1.20.5

What conditions does exploitation require?

Attack vectorlocal
Required privilegesUnavailable in this record.

What is affected?

Google Cloud · Go commandversion=0 <1.19.10; version=1.20.0-0 <1.20.5

Published CVSS scores

9.8CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
9.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

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)
Vectorlocal
PrivilegesUnavailable
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-94Improper Control of Generation of Code ('Code Injection')
T1195.001Compromise Software Dependencies and Development Tools: Compromise Software Dependencies

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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