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CVE-2026-47825 Spring CVE debrief

CVE-2026-47825 is a high-severity vulnerability affecting Spring Cloud Gateway Server. The vulnerability allows for header injection attacks due to the forwarding of X-Forwarded-For and Forwarded headers from untrusted proxies in certain configuration scenarios. This affects both WebMVC and WebFlux Gateway Servers. The affected versions are Spring Cloud Gateway 3.1.x (fix 3.1.13), 4.1.x (fix 4.1.13), 4.2.x (fix 4.2.9), 4.3.x (fix 4.3.5), and 5.0.x (fix 5.0.2). The CVSS score for this vulnerability is 8.6, indicating a high severity.

Vendor
Spring
Product
Spring Cloud Gateway
CVSS
HIGH 8.6
CISA KEV
Not listed in stored evidence
Original CVE published
2026-06-15
Original CVE updated
2026-06-23
Advisory published
2026-06-15
Advisory updated
2026-06-23

Who should care

Users of Spring Cloud Gateway Server, particularly those using affected versions, should be aware of this vulnerability and take steps to mitigate it.

Technical summary

The vulnerability arises from the improper handling of X-Forwarded-For and Forwarded headers in Spring Cloud Gateway Server. When certain configurations are used, the server forwards these headers from untrusted proxies, potentially leading to header injection attacks.

Defensive priority

High

Recommended defensive actions

  • Upgrade to a fixed version of Spring Cloud Gateway Server: 3.1.13, 4.1.13, 4.2.9, 4.3.5, or 5.0.2.
  • Review and adjust configuration scenarios to prevent forwarding of X-Forwarded-For and Forwarded headers from untrusted proxies.

Evidence notes

The CVE record and NVD detail provide official information on the vulnerability. Additional details can be found in the source reference.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-47825 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-47825

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2026-47825 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-47825

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Supplemental references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.