CVE-2026-41840

Analyzed Analyzed - Analysis Complete

Denial of Service in Spring WebFlux via Malicious Multipart Requests

Publication date: 2026-06-09

Last updated on: 2026-06-26

Assigner: VMware

Description

Spring WebFlux applications are vulnerable to Denial of Service (DoS) attacks when processing multipart requests. 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.

CVSS Scores

EPSS Scores

Probability:
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Meta Information

Published

2026-06-09

Last Modified

2026-06-26

Generated

2026-06-29

AI Q&A

2026-06-09

EPSS Evaluated

2026-06-28

NVD

CVE-2026-41840

EUVD

EUVD-2026-35327

Affected Vendors & Products

Vendor	Product	Version / Range
vmware	spring_framework	From 5.3.0 (inc) to 5.3.49 (exc)
vmware	spring_framework	From 6.1.0 (inc) to 6.1.28 (exc)
vmware	spring_framework	From 6.2.0 (inc) to 6.2.18.1 (exc)
vmware	spring_framework	From 7.0.0 (inc) to 7.0.7.1 (exc)

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-400	The product does not properly control the allocation and maintenance of a limited resource.
CWE-401	The product does not sufficiently track and release allocated memory after it has been used, making the memory unavailable for reallocation and reuse.

Attack-Flow Graph

Executive Summary

CVE-2026-41840 is a medium-severity vulnerability in the Spring Framework that affects WebFlux applications when processing multipart requests.

The vulnerability allows an attacker to send specially crafted multipart requests that cause memory leaks, which can lead to the application crashing or becoming unavailable.

Impact Analysis

This vulnerability can impact you by causing a Denial of Service (DoS) condition in your Spring WebFlux application.

An attacker exploiting this issue can send malicious multipart requests that leak memory, potentially causing your application to crash or become unavailable to legitimate users.

Mitigation Strategies

To mitigate the risk of this vulnerability, users should upgrade their Spring Framework versions to the fixed releases.

Upgrade to Spring Framework 7.0.8 (OSS) or 7.0.7.1 (Commercial)
Upgrade to Spring Framework 6.2.19 (OSS) or 6.2.18.1 (Commercial)
Upgrade to Spring Framework 6.1.28 (Commercial)
Upgrade to Spring Framework 5.3.49 (Commercial)

No additional mitigation steps are required beyond upgrading.

Compliance Impact

The provided information does not specify any direct impact of CVE-2026-41840 on compliance with common standards and regulations such as GDPR or HIPAA.

Detection Guidance

There are no specific detection commands or network/system detection methods provided for this vulnerability in the available resources.

The vulnerability affects Spring WebFlux applications processing multipart requests, leading to potential Denial of Service via memory leaks.

The recommended action is to verify the Spring Framework version in use and upgrade to the fixed versions to mitigate the risk.

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