CVE-2026-47890 Spring Framework Server Sent Event stream corruption while rendering fragments
Attackers can corrupt Server-Sent Event streams in Spring MVC and WebFlux applications by exploiting view fragment rendering flaws.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-47890?
CVE-2026-47890 is a critical 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
Spring MVC and WebFlux applications are vulnerable to stream corruption when using Server-Sent Events (SSE) with view fragments. Spring Framework 7.0.0 - 7.0.8 Spring Framework 6.2.0 - 6.2.19
Weakness: CWE-93
Which versions are affected by CVE-2026-47890?
8 open source packages ship an affected version, including org.springframework:spring-webflux and org.springframework:spring-webmvc. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
org.springframework:spring-webflux Maven | From 6.2.0 to 6.2.19 | None |
org.springframework:spring-webflux Maven | From 6.2.0 to 6.2.19 | None |
org.springframework:spring-webflux Maven | From 7.0.0 | 7.0.9 |
org.springframework:spring-webflux Maven | From 7.0.0 | 7.0.9 |
org.springframework:spring-webmvc Maven | From 6.2.0 to 6.2.19 | None |
org.springframework:spring-webmvc Maven | From 6.2.0 to 6.2.19 | None |
2 more packages
org.springframework:spring-webmvc Maven | From 7.0.0 | 7.0.9 |
org.springframework:spring-webmvc Maven | From 7.0.0 | 7.0.9 |
Products include Vmware Spring Framework.
How do I fix CVE-2026-47890?
Upgrade org.springframework:spring-webflux to 7.0.9 or later.
Is CVE-2026-47890 being exploited?
There is no known exploitation of CVE-2026-47890 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-2026-47891 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
- CVE-2016-1000027 Pivotal Spring Framework contains unsafe Java deserialization methods
Sources
Also known as CLEANSTART-2026-MH81901, CLEANSTART-2026-WP23886, CLEANSTART-2026-ZQ00581, ECHO-0cf8-801a-4d33, GHSA-j9f9-w8pj-32f8, MINI-cphp-5376-ffpm and 5 more.