CVE-2026-47885

Undergoing Analysis Undergoing Analysis - In Progress

PartEventHttpMessageReader Max Part Size Bypass in Spring Framework

Publication date: 2026-08-27

Last updated on: 2026-09-10

Assigner: VMware

Description

The PartEventHttpMessageReader in Spring WebFlux does not enforce the maxPartSize limit when maxInMemorySize is set to -1. Spring Framework 7.0.0 - 7.0.8 Spring Framework 6.2.0 - 6.2.19 Spring Framework 6.1.0 - 6.1.28

CVSS Scores

EPSS Scores

Probability:
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Meta Information

Published

2026-08-27

Last Modified

2026-09-10

Generated

2026-09-16

AI Q&A

2026-08-27

EPSS Evaluated

2026-09-15

NVD

CVE-2026-47885

EUVD

EUVD-2026-66853

Affected Vendors & Products

Vendor	Product	Version / Range
vmware	spring_framework	From 6.2.0 (inc) to 6.2.20 (exc)
vmware	spring_framework	From 6.1.0 (inc) to 6.1.29 (exc)
vmware	spring_framework	From 7.0.0 (inc) to 7.0.8.1 (exc)

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-770	The product allocates a reusable resource or group of resources on behalf of an actor without imposing any intended restrictions on the size or number of resources that can be allocated.

Attack-Flow Graph

Executive Summary

The PartEventHttpMessageReader in Spring WebFlux fails to enforce the maxPartSize limit when maxInMemorySize is set to -1. This affects applications using controller methods with an @RequestBody Flux<PartEvent> argument.

Detection Guidance

This vulnerability can be detected by checking the Spring Framework version in use. If your application uses Spring WebFlux with versions 7.0.0-7.0.8, 6.2.0-6.2.19, or 6.1.0-6.1.28, it is vulnerable. No specific commands are provided for detection beyond version checks.

Impact Analysis

This vulnerability could allow attackers to bypass size restrictions on file uploads or multipart requests, potentially leading to denial of service or unauthorized data processing.

Compliance Impact

This vulnerability could potentially impact compliance with GDPR or HIPAA if exploited to process excessive file uploads, leading to unauthorized data exposure or denial of service. However, the provided context does not explicitly link this issue to specific compliance violations.

Mitigation Strategies

Upgrade to fixed versions: Spring Framework 7.0.9, 7.0.8.1 (Enterprise), 6.2.20 (Enterprise), or 6.1.29 (Enterprise). No additional mitigation steps are required beyond upgrading.

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