Spring Security Advisories

CVE-2021-22051: Spring Cloud Gateway Request Vulnerability

HIGH | NOVEMBER 04, 2021 | CVE-2021-22051


Applications using Spring Cloud Gateway are vulnerable to specifically crafted requests that could make an extra request on downstream services.

Affected Spring Products and Versions

  • Spring Cloud Gateway
    • 3.0.0 to 3.0.4
    • 2.2.0.RELEASE to 2.2.9.RELEASE
    • Older, unsupported versions are also affected


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+. No other steps are necessary. Releases that have fixed this issue include:

  • Spring Cloud Gateway
    • 3.0.5+
    • 2.2.10.RELEASE+


This vulnerability was discovered and responsibly reported by Frederico Biehl and Maxim Tyukov from the Backbase security team.


  • 2021-11-04: Initial vulnerability report published.

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