Multipart Request Smuggling Vulnerability in Spring Framework
CVE-2026-41853

5.3MEDIUM

Key Information:

Vendor

Spring

Status
Spring Framework
Vendor
CVE Published:
9 June 2026

What is CVE-2026-41853?

Spring MVC and WebFlux applications are susceptible to Multipart request smuggling attacks, which can lead to the manipulation of request payloads sent to a server. This vulnerability arises from the improper handling of multipart requests, allowing attackers to potentially bypass security controls and exploit backend services. To mitigate risks, it is crucial to upgrade to the patched versions of the Spring Framework and review application code for secure handling of multipart data.

Affected Version(s)

Spring Framework 7.0.0 < 7.0.7.1

Spring Framework 6.2.0 < 6.2.18.1

Spring Framework 6.1.0 < 6.1.28

References

https://spring.io/security/cve-2026-41853

CVSS V3.1

Score:
5.3
Severity:
MEDIUM
Confidentiality:
None
Integrity:
Low
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.