CVE-2026-22735 Server Sent Event stream corruption
Attackers can corrupt Server-Sent Event streams in Spring MVC and WebFlux applications, potentially causing service disruption.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- Available
What is CVE-2026-22735?
CVE-2026-22735 is a low-severity denial of service vulnerability in Vmware Spring Framework, published on 19 Mar 2026. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.
Official description
Spring MVC and WebFlux applications are vulnerable to stream corruption when using Server-Sent Events (SSE). This issue affects Spring Foundation: from 7.0.0 through 7.0.5, from 6.2.0 through 6.2.16, from 6.1.0 through 6.1.25, from 5.3.0 through 5.3.46.
Weakness: CWE-667
Which versions are affected by CVE-2026-22735?
16 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 5.3.0 to 5.3.39 | None |
org.springframework:spring-webflux Maven | From 5.3.0 to 5.3.39 | None |
org.springframework:spring-webflux Maven | From 6.0.0 to 6.1.21 | None |
org.springframework:spring-webflux Maven | From 6.0.0 to 6.1.21 | None |
org.springframework:spring-webflux Maven | From 6.2.0 | 6.2.17 |
org.springframework:spring-webflux Maven | From 6.2.0 | 6.2.17 |
10 more packages
org.springframework:spring-webflux Maven | From 7.0.0-M1 | 7.0.6 |
org.springframework:spring-webflux Maven | From 7.0.0-M1 | 7.0.6 |
org.springframework:spring-webmvc Maven | From 5.3.0 to 5.3.39 | None |
org.springframework:spring-webmvc Maven | From 5.3.0 to 5.3.39 | None |
org.springframework:spring-webmvc Maven | From 6.0.0 to 6.1.21 | None |
org.springframework:spring-webmvc Maven | From 6.0.0 to 6.1.21 | None |
org.springframework:spring-webmvc Maven | From 6.2.0 | 6.2.17 |
org.springframework:spring-webmvc Maven | From 6.2.0 | 6.2.17 |
org.springframework:spring-webmvc Maven | From 7.0.0-M1 | 7.0.6 |
org.springframework:spring-webmvc Maven | From 7.0.0-M1 | 7.0.6 |
Products include Vmware Spring Framework.
How do I fix CVE-2026-22735?
Upgrade org.springframework:spring-webflux to a fixed version for your release line: 6.2.17 or 7.0.6.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2026-22735 being exploited?
There is no known exploitation of CVE-2026-22735 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-LS72691, CLEANSTART-2026-MW19809, CLSA-2026-1779410897, CLSA-2026-1779410898, CLSA-2026-1780447836, CLSA-2026-1785291369 and 15 more.