Spring Cloud Gateway Server Forwards Headers from Untrusted Proxies in certain situations

published 2026-06-15 4 mo ago modified 2026-10-25 14 d ago also EUVD-2026-37000

cvss: 8.6; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 0.2%; EPSS 0.2% chance of exploitation in 30 days, percentile 7%
public exploits: 0; none known

Spring Cloud Gateway Server forwards the X-Forwarded-For and Forwarded headers from untrusted proxies in certain configuration scenarios. This affects both the WebMVC and WebFlux Gateway Servers.

Affected versions: Spring Cloud Gateway 3.1.x (fix 3.1.13). Spring Cloud Gateway 4.1.x (fix 4.1.13). Spring Cloud Gateway 4.2.x (fix 4.2.9). Spring Cloud Gateway 4.3.x (fix 4.3.5). Spring Cloud Gateway 5.0.x (fix 5.0.2).

Patch / fix

fixed in 1

Spring Spring Cloud Gateway 3.1.13, 4.1.13, 4.2.9, 4.3.4.1, 5.0.1.1

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2026-47825 updated 2026-08-04 cvss 7.5

spring-cloud-gateway: Spring Cloud Gateway Server: Security bypass due to untrusted header forwarding

Red Hat JBoss Enterprise Application Platform Expansion Pack spring-cloud-gateway-core, opentelemetry-javaagent-spring-cloud-gateway-2.0
not affected: component not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation: none
Automatable: yes
Technical impact: partial
Assessed: 4 mo ago (2026-06-16)

Exploit prediction

0.18% chance of exploitation in the next 30 days, higher than 7% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
CNA	3.1	8.6	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:H/A:N

Affected products

Spring Spring Cloud Gateway

Classification

Weakness

CWE-346 Origin Validation Error

Technology feeds

Spring rss critical rss

References

spring.io /security/cve-2026-47825
vendor-advisory

Sources

CVE List CVE-2026-47825
NVD CVE-2026-47825

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary