CVE-2026-41840: Spring Framework Denial of Service Vulnerability
MODERATECVE-2026-41840 is a MODERATE (CVSS 5.9) denial of service vulnerability (CWE-400: Uncontrolled Resource Consumption) affecting Spring Framework libraries in the Maven ecosystem. The issue involves spring framework denial of service via multipart requests in webflux. Remediation is available by upgrading affected packages to version 7.0.8, 6.2.19.
CVE-2026-41840 at a Glance
Security Impact
CVSS: 5.9
The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H).
How to Fix CVE-2026-41840
To remediate this vulnerability, upgrade all affected Spring Framework dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-webflux</artifactId>
<version>7.0.8</version>
</dependency><dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-webflux</artifactId>
<version>6.2.19</version>
</dependency><dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-webflux</artifactId>
<version>Latest secure release</version>
</dependency><dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-webflux</artifactId>
<version>Latest secure release</version>
</dependency>Run the following command in your project directory to verify that all resolved dependencies use the patched release:
mvn dependency:tree -Dincludes=org.springframeworkHow to Check if You Are Affected
To determine whether your Java application is affected by CVE-2026-41840, inspect your build dependencies using the Maven Dependency Plugin:
mvn dependency:tree -Dincludes=org.springframeworkAnalyze the terminal output to locate any version of Spring Framework in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 7.0.8), your application is affected.
Note: The mvn dependency:tree -Dincludes=org.springframework command inspects the resolved dependency graph declared in your project's POM files; it does not perform automated security scanning or inspect runtime dynamic classpaths. Always verify runtime container classpaths and shaded JARs.
Technical Details
Vulnerability Mechanism & Technical Analysis
This vulnerability is classified under CWE-400: Uncontrolled Resource Consumption, where the product does not properly control the allocation and maintenance of a limited resource. In Spring Framework, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.
Source Advisory Statement
CVE-2026-41840 Affected Spring Framework Versions
4 component(s)| Product / Package | Ecosystem | Affected Versions | Fixed Version |
|---|---|---|---|
|
org.springframework:spring-webflux
|
Maven |
≥ 7.0.0
< 7.0.8
|
7.0.8
|
|
org.springframework:spring-webflux
|
Maven |
≥ 6.2.0
< 6.2.19
|
6.2.19
|
|
org.springframework:spring-webflux
|
Maven |
≥ 6.1.0
≤ 6.1.21
|
|
|
org.springframework:spring-webflux
|
Maven |
≤ 5.3.39
|
|
References
Frequently Asked Questions
What is CVE-2026-41840?
Which Spring Framework versions are affected?
What version fixes CVE-2026-41840?
Is spring-webflux affected?
What is the CVSS score of CVE-2026-41840?
What CWE is associated with CVE-2026-41840?
How can I check Maven dependencies for CVE-2026-41840?
Machine-readable OSV JSON
OSV v1.5 Schema
{
"schema_version" : "1.4.0",
"id" : "GHSA-83f7-v6px-pp3h",
"modified" : "2026-07-30T15:20:14Z",
"published" : "2026-06-09T06:31:57Z",
"aliases" : [ "CVE-2026-41840" ],
"summary" : "Spring Framework Denial of Service via Multipart Requests in WebFlux",
"details" : "Spring WebFlux applications are vulnerable to Denial of Service (DoS) attacks when processing multipart requests.\n\nAffected versions:\nSpring 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.",
"severity" : [ {
"type" : "CVSS_V3",
"score" : "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H"
} ],
"affected" : [ {
"package" : {
"ecosystem" : "Maven",
"name" : "org.springframework:spring-webflux"
},
"ranges" : [ {
"type" : "ECOSYSTEM",
"events" : [ {
"introduced" : "7.0.0"
}, {
"fixed" : "7.0.8"
} ]
} ],
"database_specific" : {
"last_known_affected_version_range" : "<= 7.0.7"
}
}, {
"package" : {
"ecosystem" : "Maven",
"name" : "org.springframework:spring-webflux"
},
"ranges" : [ {
"type" : "ECOSYSTEM",
"events" : [ {
"introduced" : "6.2.0"
}, {
"fixed" : "6.2.19"
} ]
} ],
"database_specific" : {
"last_known_affected_version_range" : "<= 6.2.18"
}
}, {
"package" : {
"ecosystem" : "Maven",
"name" : "org.springframework:spring-webflux"
},
"ranges" : [ {
"type" : "ECOSYSTEM",
"events" : [ {
"introduced" : "6.1.0"
}, {
"last_affected" : "6.1.21"
} ]
} ]
}, {
"package" : {
"ecosystem" : "Maven",
"name" : "org.springframework:spring-webflux"
},
"ranges" : [ {
"type" : "ECOSYSTEM",
"events" : [ {
"introduced" : "0"
}, {
"last_affected" : "5.3.39"
} ]
} ]
} ],
"references" : [ {
"type" : "ADVISORY",
"url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-41840"
}, {
"type" : "PACKAGE",
"url" : "https://github.com/spring-projects/spring-framework"
}, {
"type" : "WEB",
"url" : "https://github.com/spring-projects/spring-framework/releases/tag/v6.2.19"
}, {
"type" : "WEB",
"url" : "https://github.com/spring-projects/spring-framework/releases/tag/v7.0.8"
}, {
"type" : "WEB",
"url" : "https://spring.io/security/cve-2026-41840"
} ],
"database_specific" : {
"cwe_ids" : [ "CWE-400", "CWE-401" ],
"severity" : "MODERATE",
"github_reviewed" : true,
"github_reviewed_at" : "2026-07-30T15:20:13Z",
"nvd_published_at" : "2026-06-09T05:16:35Z"
}
}