CVE-2026-41840 Security Details

CVE ID

CVE-2026-41840

CWE

CWE-400

CWE-401

CVE 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.

Published

Jun 8, 2026

CVSS Score & Severity

8.2High

CVSS Vector

CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

EPSS Score

0.049%

Malware

malware

KEV Status

Not in KEV Catalog: No known exploits

Vulnerable Methods

org/springframework/http/codec/multipart/DefaultPartHttpMessageReader.read(Lorg/springframework/core/ResolvableType;Lorg/springframework/http/ReactiveHttpInputMessage;Ljava/util/Map;)Lreactor/core/publisher/Flux;

JVM

org/springframework/http/codec/multipart/PartGenerator.tooManyParts()Z

JVM

Affected Ecosystems

affected

Source

National Vulnerability Database

References

spring.ioPROJECT