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HIGH severity

CVE-2025-41235 — spring-cloud-gateway-serv…

HIGH

CVE-2025-41235 is a high-severity (CVSS 8.6) CWE-444 vulnerability in org.springframework.cloud:spring-cloud-gateway-server. A fix is available for org.springframework.cloud:spring-cloud-gateway-server — see the affected versions and patch details below.

Spring Cloud Gateway Server Forwards Headers from Untrusted Proxies

Published
Updated
Affected
5 pkgs
Patched
4 / 5
Exploits
None indexed
Exploitation data as of Nov 3, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

Exploitation Status

No confirmed exploitation observed yet

  • CISA assesses this as automatable — exploitation doesn’t require manual, per-target effort, which raises the odds of mass scanning and opportunistic attacks.
  • CISA’s own triage has not observed active exploitation or public proof-of-concept code for this CVE as of its last assessment.

Exploitation and automatability from CISA’s SSVC triage for CVE-2025-41235.

EPSS Exploitation Probability

via FIRST.org ↗
0.4%probability of exploitation in next 30 days
Lower Risk0.00%
Lower risk than most CVEs30th percentile — riskier than 30% of all scored CVEsHighest risk
0.00%0.30%0.60%0.89%0.4%0.4%May 26Sep 26Nov 26

Probability of exploitation in the next 30 days, from FIRST.org EPSS.

How urgent is this, really

Where this sits among everything scored

Real-World Exposure

5 pkgs affected
☕org.springframework.cloud:spring-cloud-gateway-server☕org.springframework.cloud:spring-cloud-gateway-server☕org.springframework.cloud:spring-cloud-gateway-server☕org.springframework.cloud:spring-cloud-gateway-server☕org.springframework.cloud:spring-cloud-gateway-server-mvc

Real-time download stats are indexed for npm and PyPI packages. This vulnerability affects Maven packages — download data is not available via public APIs for these ecosystems.

Description

Spring Cloud Gateway Server forwards the X-Forwarded-For and Forwarded headers from untrusted proxies.

Affected Packages

5 total 4 fixed
EcosystemPackageVulnerable rangeFix
☕Mavenorg.springframework.cloud:spring-cloud-gateway-server≥ 4.2.0&&< 4.2.34.2.3org.springframework.cloud:spring-cloud-gateway-server:4.2.3
☕Mavenorg.springframework.cloud:spring-cloud-gateway-server≥ 4.1.0&&< 4.1.84.1.8org.springframework.cloud:spring-cloud-gateway-server:4.1.8
☕Mavenorg.springframework.cloud:spring-cloud-gateway-server≥ 4.0.0No fix
☕Mavenorg.springframework.cloud:spring-cloud-gateway-serverall versions3.1.10org.springframework.cloud:spring-cloud-gateway-server:3.1.10
☕Mavenorg.springframework.cloud:spring-cloud-gateway-server-mvc≥ 4.1.7&&< 4.2.34.2.3org.springframework.cloud:spring-cloud-gateway-server-mvc:4.2.3

Detection & mitigation playbook

Open-source dependency

  1. Detect

    Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for org.springframework.cloud:spring-cloud-gateway-server, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.

  2. Fix

    Update org.springframework.cloud:spring-cloud-gateway-server to 4.2.3 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2025-41235 is resolved across your whole dependency graph.

  3. Workarounds

    If you can't upgrade right away: gate or disable the affected feature, validate untrusted input at the boundary, and avoid passing attacker-controlled data into the vulnerable path. O3's runtime protection blocks exploitation in production as an interim safeguard until the upgrade lands.

Frequently Asked Questions

Spring Cloud Gateway Server forwards the X-Forwarded-For and Forwarded headers from untrusted proxies.
O3 Security · Impact-Aware SCA

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CVE-2025-41235: spring-cloud-gateway — Fixed in 4.2.3