# github.com/davecgh/go-spew@v1.1.2-0.20180830191138-d8f796af33cc security report (Go)

- Verdict: **Needs review** (risk level: medium)
- Scanned: 2026-10-05T19:10:30.000Z
- Files reviewed: 9
- Findings: 1 medium, 2 low severity findings
- Report: https://security.togoder.click/go/github.com/davecgh/go-spew
- Source: Togoder Security (https://security.togoder.click), AI source-code review

## Summary

Togoder Security scanned the Go package github.com/davecgh/go-spew@v1.1.2-0.20180830191138-d8f796af33cc on Oct 5, 2026. An AI review of 9 source files produced 1 medium, 2 low severity findings. The overall verdict is medium: the findings flag risky but common patterns (dynamic code, unsafe defaults, broad file or network access) rather than confirmed malware.

## Findings

### [medium] Unsafe package usage / Reflect internals manipulation

Finding ID: `NPS-8F751DACF39B`

File: `spew/bypass.go:92`

The code uses the unsafe package to directly manipulate unexported fields of reflect.Value (specifically the internal 'flag' field) to bypass Go's type safety and read unexported struct fields. While this is a legitimate technique used by the spew library for pretty-printing, it circumvents Go's memory safety guarantees and relies on internal implementation details that could change between Go versions.

### [low] Build constraint to enable unsafe code

Finding ID: `NPS-E690DB8025FC`

File: `spew/bypass.go:15`

The build constraints (!js,!appengine,!safe,!disableunsafe,go1.4) are designed to ensure this unsafe reflection-bypassing code is compiled in by default. The 'safe' tag is an opt-out mechanism, meaning most builds will include the unsafe code automatically without explicit developer consent, which is a questionable default for a library that bypasses type safety.

### [low] Init-time reflection and panic behavior

Finding ID: `NPS-FECA4AE463C6`

File: `spew/bypass.go:106`

The init() function performs runtime introspection of the reflect package's internal layout at import time. It will panic if the reflect.Value flag semantics don't match expected values. This runs automatically on package import and could cause denial of service in applications using this package if Go's reflect internals change, though this is defensive rather than malicious.

## Files reviewed

- `spew/bypass.go` (medium): This is a legitimate library file (part of spew) that intentionally uses unsafe reflection internals to access unexported fields for pretty-printing, but it bypasses Go's type safety guarantees and should be reviewed for supply-chain risk if the maintainer or version provenance is untrusted.
- `spew/bypasssafe.go` (safe): Cleared by Jev triage; no further analysis needed
- `spew/common.go` (safe): No malicious patterns detected
- `spew/config.go` (safe): Cleared by Jev triage; no further analysis needed
- `spew/doc.go` (safe): Cleared by Jev triage; no further analysis needed
- `spew/dump.go` (safe): No malicious patterns detected; the code is a legitimate reflection-based pretty-printer with no network, filesystem, process, or dynamic-execution capabilities.
- `spew/format.go` (safe): Cleared by Jev triage; no further analysis needed
- `spew/spew.go` (safe): Cleared by Jev triage; no further analysis needed
- `spew/testdata/dumpcgo.go` (safe): No malicious patterns detected in this cgo test file that only contains static C char pointer definitions and test-only accessor functions.

AI analysis is guidance, not a guarantee. Methodology: https://security.togoder.click/methodology