CVE-2026-47893 Spring Framework Request Headers Included in Exception Reasons in HandshakeWebsocketService
Attackers can view sensitive request headers via exception messages in Spring WebFlux WebSocket applications, potentially exposing user data.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-47893?
CVE-2026-47893 is a high-severity vulnerability in Vmware Spring Framework, published on 27 Aug 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
A Spring WebFlux application that supports WebSocket connections may expose indirectly sensitive user information by including request headers in an exception reason. Spring Framework 7.0.0 - 7.0.8 Spring Framework 6.2.0 - 6.2.19 Spring Framework 6.1.0 - 6.1.28 Spring Framework 6.0.0 - 6.0.30 Spring Framework 5.3.0 - 5.3.49 Spring Framework 5.2.25.RELEASE and earlier
Weakness: CWE-209
Which versions are affected by CVE-2026-47893?
It affects 1 product.
Products include Vmware Spring Framework.
How do I fix CVE-2026-47893?
Upgrade to a fixed version.
Is CVE-2026-47893 being exploited?
There is no known exploitation of CVE-2026-47893 in the wild and no public exploit code.
Other vulnerabilities in Vmware Spring Framework
- CVE-2026-47884 Spring Framework Improper Path Limitation in XsltView
- CVE-2026-47890 Spring Framework Server Sent Event stream corruption while rendering fragments
- CVE-2026-47891 Spring Framework maxInMemorySize Bypassed in Jaxb2Decoder
- CVE-2026-47892 Spring Framework Header Predicate Bypass in WebFlux Functional Endpoints
- CVE-2026-59313 Server Sent Event stream corruption in Spring MVC functional web framework
Sources
Also known as CLEANSTART-2026-AY49632, CLEANSTART-2026-CU45491, CLEANSTART-2026-IY13000, CLEANSTART-2026-TS74004, DEBIAN-CVE-2026-47893, GHSA-vw3r-pj6g-mjg8 and 1 more.