Spring Cloud Gateway Server Webflux is vulnerable to Expression Language Injection

Exploitation

No confirmed exploitation recorded. Patch Next marks exploitation only from CISA KEV.

CVSS

7.5 · CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

EPSS

• CVE-2025-41253: 0.48% estimated exploitation activity in the next 30 days; percentile 41.29 (FIRST EPSS, 2026-11-03). This is a model estimate, not proof of exploitation or customer exposure.

As published by the source; long descriptions are shortened.

The following versions of Spring Cloud Gateway Server Webflux may be vulnerable to the ability to expose environment variables and system properties to attackers. An application should be considered vulnerable when all the following are true: The application is using Spring Cloud Gateway Server Webflux (Spring Cloud Gateway Server WebMVC is not vulnerable). An admin or untrusted third party using Spring Expression Language (SpEL) to access environment variables or system properties via routes. An untrusted third party could create a route that uses SpEL to access environment variables or system properties if: The Spring Cloud Gateway Server Webflux actuator web endpoint is enabled via management.endpoints.web.exposure.include=gateway and management.endpoint.gateway.enabled=trueor management.endpoint.gateway.access=unrestricte. The actuator endpoints are available to attackers. The actuator endpoints are unsecured.

Published by the source

16 Oct 2025, 15:30 UTC

Last modified by the source

19 Feb 2026, 22:00 UTC

Source last checked

26 Oct 2026, 16:44 UTC

1. Revision 1 · created · 26 Oct 2026

   Published from ghsa record GHSA-fwxx-wv44-7qfg

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# Patch Next advisory brief: CVE-2025-41253

Advisory: Spring Cloud Gateway Server Webflux is vulnerable to Expression Language Injection
IDs: CVE-2025-41253, GHSA-fwxx-wv44-7qfg
Record: https://patchnext.com/advisories/cve-2025-41253 (revision 1, source checked 26 Oct 2026, 16:44 UTC)
Inventory: none attached. This brief comes from a public page and does not say whether any deployment is affected.
Severity: High (CVSS 7.5)
Exploitation: no confirmed exploitation recorded. Patch Next confirms exploitation only from CISA KEV.
Vendor response: Partial vendor fix; fixed versions by package: org.springframework.cloud:spring-cloud-gateway-server 4.3.2, 4.2.6. A vendor fix does not mean a deployment is fixed.

## Affected components
- Maven org.springframework.cloud:spring-cloud-gateway-server: affected >= 4.3.0, < 4.3.2; >= 4.2.0, < 4.2.6; >= 4.0.0, <= 4.1.9; <= 3.1.10; fixed in 4.3.2, 4.2.6

## Suggested inspection (read-only)
- Maven org.springframework.cloud:spring-cloud-gateway-server: check the installed version with your package manager.

## Supported action
No complete vendor fix is recorded. Follow the primary source's mitigation guidance and check this record again before closing anything.

## Required regression checks
- Run the test suite and a production build.
- Exercise the features that depend on org.springframework.cloud:spring-cloud-gateway-server.
- Repeat the inspection and confirm that only fixed versions remain installed.

## Rollback considerations
- Keep the previous lockfile and deployment artifact. Rolling back reinstates the vulnerable version, so apply any documented mitigation while you fix forward.

## Unresolved questions
- Which deployments run an affected version?
- Exploitation status can change. Check again before lowering the priority.
- Mark the work resolved only after the fixed version is verified in production.

## Sources
- Verified: https://github.com/advisories/GHSA-fwxx-wv44-7qfg (GitHub-reviewed advisory GHSA-fwxx-wv44-7qfg lists affected ranges: Maven org.springframework.cloud:spring-cloud-gateway-server >=4.3.0 =4.2.0 =4.0.0 =0 <=3.1.10)

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