Vulnerability · Published Apr 29, 2026 · Assigned by vmware
CVE-2026-22741Static resource cache poisoning in Spring MVC and WebFlux
Low 3.1
In plain English
A low-severity security flaw in Spring Framework from VMware. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 15% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Official description
Spring MVC and WebFlux applications are vulnerable to cache poisoning when resolving static resources. More precisely, an application can be vulnerable when all the following are true: * the application is using Spring MVC or Spring WebFlux * the application is configuring the resource chain support https://docs.spring.io/spring-framework/reference/web/webmvc/mvc-config/static-resources.html#page-title with caching enabled * the application adds support for encoded resources resolution * the resource cache must be empty when the attacker has access to the application When all the conditions above are met, the attacker can send malicious requests and poison the resource cache with resources using the wrong encoding. This can cause a denial of service by breaking the front-end application for clients.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:12 | libspring-java | no fix listed | DEBIAN-CVE-2026-22741 |
| Debian:13 | libspring-java | no fix listed | DEBIAN-CVE-2026-22741 |
| Debian:14 | libspring-java | no fix listed | DEBIAN-CVE-2026-22741 |
| Maven | org.springframework:spring-webflux | 7.0.7 | GHSA-wg35-8jpf-2xv3 |
| Maven | org.springframework:spring-webflux | 6.2.18 | GHSA-wg35-8jpf-2xv3 |
| Maven | org.springframework:spring-webflux | no fix listed | GHSA-wg35-8jpf-2xv3 |
| Maven | org.springframework:spring-webflux | no fix listed | GHSA-wg35-8jpf-2xv3 |
| Maven | org.springframework:spring-webmvc | no fix listed | GHSA-wg35-8jpf-2xv3 |
| Maven | org.springframework:spring-webmvc | 7.0.7 | GHSA-wg35-8jpf-2xv3 |
| Maven | org.springframework:spring-webmvc | 6.2.18 | GHSA-wg35-8jpf-2xv3 |
| Maven | org.springframework:spring-webmvc | no fix listed | GHSA-wg35-8jpf-2xv3 |
| Ubuntu:25.10 | libspring-java | no fix listed | UBUNTU-CVE-2026-22741 |
| Ubuntu:26.04:LTS | libspring-java | no fix listed | UBUNTU-CVE-2026-22741 |
| Ubuntu:26.10 | libspring-java | no fix listed | UBUNTU-CVE-2026-22741 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| VMware | Spring Framework | 7.0.0 – before 7.0.76.2.0 – before 6.2.186.1.0 – before 6.1.275.3.0 – before 5.3.48 |
Weakness: CWE-524 · Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:N/A:L