Incorrect authorization in Spring Framework - CVE-2026-47892
Published: August 28, 2026
Vulnerability identifier: #VU146228
CSH Severity: Medium
CVSS v4: 6.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-47892
CWE-ID: CWE-863
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to bypass header-based access restrictions.
The vulnerability exists due to improper access control in WebFlux functional endpoints when processing pre-flight requests with DispatcherServlet. A remote attacker can send a specially crafted pre-flight request to bypass header-based access restrictions.
Only WebFlux applications using functional endpoints and deployed with DispatcherServlet are affected.
Affected software
Spring Framework
Library Support for Spring
Library Support for Spring
How to mitigate CVE-2026-47892
Install security update from vendor's website.
Spring Framework - addressed in versions 5.2.26, 5.3.50, 6.0.31, 6.1.29, 6.2.20, 7.0.8.1, 7.0.9
Library Support for Spring - update to 3.5.19
Library Support for Spring - update to 3.5.19