Vulnerability · Published Jun 9, 2026 · Assigned by vmware
CVE-2026-41853Spring Framework Multipart Request Smuggling in Spring MVC and WebFlux
Medium 5.3
In plain English
A medium-severity security flaw in Spring Framework from Spring. 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 8% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS 3.1)5.3Medium
Exploit odds (30 days)0.2%top 91.7% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
Spring MVC and WebFlux applications are vulnerable to Multipart request smuggling attacks. Affected versions: Spring Framework 7.0.0 through 7.0.7; 6.2.0 through 6.2.18; 6.1.0 through 6.1.27; 5.3.0 through 5.3.48.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:12 | libspring-java | no fix listed | DEBIAN-CVE-2026-41853 |
| Debian:13 | libspring-java | no fix listed | DEBIAN-CVE-2026-41853 |
| Debian:14 | libspring-java | no fix listed | DEBIAN-CVE-2026-41853 |
| Maven | org.springframework:spring-webflux | no fix listed | GHSA-cjpg-rgq5-fr37 |
| Maven | org.springframework:spring-webflux | 7.0.8 | GHSA-cjpg-rgq5-fr37 |
| Maven | org.springframework:spring-webflux | no fix listed | GHSA-cjpg-rgq5-fr37 |
| Maven | org.springframework:spring-webflux | 6.2.19 | GHSA-cjpg-rgq5-fr37 |
| Maven | org.springframework:spring-webmvc | 7.0.8 | GHSA-cjpg-rgq5-fr37 |
| Maven | org.springframework:spring-webmvc | 6.2.19 | GHSA-cjpg-rgq5-fr37 |
| Maven | org.springframework:spring-webmvc | no fix listed | GHSA-cjpg-rgq5-fr37 |
| Maven | org.springframework:spring-webmvc | no fix listed | GHSA-cjpg-rgq5-fr37 |
| Ubuntu:25.10 | libspring-java | no fix listed | UBUNTU-CVE-2026-41853 |
| Ubuntu:26.04:LTS | libspring-java | no fix listed | UBUNTU-CVE-2026-41853 |
| Ubuntu:26.10 | libspring-java | no fix listed | UBUNTU-CVE-2026-41853 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Spring | Spring Framework | 7.0.0 – before 7.0.7.16.2.0 – before 6.2.18.16.1.0 – before 6.1.285.3.0 – before 5.3.49 |
Weakness: CWE-444 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N