CVE-2026-47825
Description
A flaw was found in Spring Cloud Gateway Server. In certain configurations, the server improperly forwards X-Forwarded-For and Forwarded headers received from untrusted proxies. This vulnerability affects both WebMVC and WebFlux Gateway Servers, potentially allowing an attacker to manipulate the perceived client origin or bypass security controls by injecting malicious header information.
Mitigation
To mitigate this issue, configure Spring Cloud Gateway Server to explicitly trust only known and secure proxy servers. Review existing configurations to ensure that X-Forwarded-For and Forwarded headers are processed exclusively from trusted sources. If these headers are not essential for application functionality, consider configuring the gateway to strip them from incoming requests. Consult official Spring Cloud Gateway documentation for detailed instructions on proxy configuration and header management.
Common Vulnerability Scoring System (CVSS) Score Details
Info alert:Important note
CVSS scores for open source components depend on vendor-specific factors (e.g. version or build chain). Therefore, Red Hat's score and impact rating can be different from NVD and other vendors. Red Hat remains the authoritative CVE Naming Authority (CNA) source for its products and services (see Red Hat classifications).
The following CVSS metrics and score provided are preliminary and subject to review.
CVSS v3 Score Breakdown
| Red Hat | NVD | cve.org | |
|---|---|---|---|
| Base Score | 7.5 | N/A | 8.6 |
| Attack Vector | Network | N/A | Network |
| Attack Complexity | Low | N/A | Low |
| Privileges Required | None | N/A | None |
| User Interaction | None | N/A | None |
| Scope | Unchanged | N/A | Changed |
| Confidentiality | None | N/A | None |
| Integrity Impact | High | N/A | High |
| Availability Impact | None | N/A | None |
Vector
Red Hat: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
cve.org: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:H/A:N
Understanding the Weakness (CWE)
Access Control
Technical Impact: Bypass Protection Mechanism
Frequently Asked Questions
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