CVE-2026-41849: Spring Framework Denial of Service Vulnerability

HIGH
Advisory Identifier: GHSA-775g-4xr8-78h8
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CVSS 7.5
CWE-190
Published
Advisory Summary

CVE-2026-41849 is a HIGH (CVSS 7.5) denial of service vulnerability (CWE-190: Integer Overflow or Wraparound) affecting Spring Framework libraries in the Maven ecosystem. The issue involves spring framework denial of service via integer overflow in spel expressions. Remediation is available in the latest vendor maintenance releases.

CVE-2026-41849 at a Glance

CVE Identifier CVE-2026-41849
GHSA Identifier GHSA-775g-4xr8-78h8
Severity HIGH
CVSS v3.1 Base Score 7.5
CWE Classification CWE-190: Integer Overflow or Wraparound
Affected Product Spring Framework
Package Ecosystem Maven
Published Date
Last Updated

Security Impact

CVSS: 7.5

The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H).

Attack Vector Network (AV:N)
Attack Complexity Low (AC:L)
Privileges Required None (PR:N)
User Interaction None (UI:N)
Scope Unchanged (S:U)
Confidentiality None (C:N)
Integrity None (I:N)
Availability High (A:H)

How to Fix CVE-2026-41849

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.

org.springframework:spring-expression fixed: Latest secure release 
<dependency>
    <groupId>org.springframework</groupId>
    <artifactId>spring-expression</artifactId>
    <version>Latest secure release</version>
</dependency>
Verify Direct and Transitive Dependencies

Run the following command in your project directory to verify that all resolved dependencies use the patched release: 

mvn dependency:tree -Dincludes=org.springframework

How to Check if You Are Affected

To determine whether your Java application is affected by CVE-2026-41849, inspect your build dependencies using the Maven Dependency Plugin:

mvn dependency:tree -Dincludes=org.springframework

Analyze 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 the patched release), 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-190: Integer Overflow or Wraparound, where the product performs a calculation that can produce an integer overflow or wraparound when the logic assumes that the resulting value will always be larger than the original value. this occurs when an integer value is incremented to a value that is too large to store in the associated representation. when this occurs, the value may become a very small or negative number. 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

An integer overflow vulnerability exists in the evaluation logic of the Spring Expression Language (SpEL). An attacker can exploit this by supplying a specially crafted SpEL expression that triggers excessive resource consumption, resulting in a Denial of Service (DoS). Affected versions: Spring Framework 5.3.0 through 5.3.48.

CVE-2026-41849 Affected Spring Framework Versions

1 component(s)
Product / Package Ecosystem Affected Versions Fixed Version
org.springframework:spring-expression
maven/org.springframework/spring-expression
Maven
≤ 5.3.39

References

NVD — CVE-2026-41849 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-41849
Spring Framework Source Repository REPOSITORY
https://github.com/spring-projects/spring-framework
Spring Framework Security Information SECURITY
https://spring.io/security/cve-2026-41849

Frequently Asked Questions

What is CVE-2026-41849?
CVE-2026-41849 is a security vulnerability in Spring Framework involving Spring Framework Denial of Service via Integer Overflow in SpEL Expressions under CWE-190: Integer Overflow or Wraparound.
Which Spring Framework versions are affected?
Affected versions include releases prior to current release patches across affected packages: org.springframework:spring-expression.
What version fixes CVE-2026-41849?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
Is spring-expression affected?
Yes, org.springframework:spring-expression is affected in releases prior to Latest secure release. Upgrade your dependency to Latest secure release or later.
What is the CVSS score of CVE-2026-41849?
CVE-2026-41849 has a CVSS v3.1 base score of 7.5 (HIGH) with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
What CWE is associated with CVE-2026-41849?
CVE-2026-41849 is classified under CWE-190: Integer Overflow or Wraparound (The product performs a calculation that can produce an integer overflow or wraparound when the logic assumes that the resulting value will always be larger than the original value. This occurs when an integer value is incremented to a value that is too large to store in the associated representation. When this occurs, the value may become a very small or negative number.).
How can I check Maven dependencies for CVE-2026-41849?
Run the dependency tree command: 'mvn dependency:tree -Dincludes=org.springframework'. This command lists direct and transitive dependencies in your build configuration so you can verify if a vulnerable version is resolved.
Machine-readable OSV JSON OSV v1.5 Schema
Normalized schema output
View Raw JSON 
{
  "schema_version" : "1.4.0",
  "id" : "GHSA-775g-4xr8-78h8",
  "modified" : "2026-07-30T16:52:21Z",
  "published" : "2026-06-09T06:31:58Z",
  "aliases" : [ "CVE-2026-41849" ],
  "summary" : "Spring Framework Denial of Service via Integer Overflow in SpEL Expressions",
  "details" : "An integer overflow vulnerability exists in the evaluation logic of the Spring Expression Language (SpEL). An attacker can exploit this by supplying a specially crafted SpEL expression that triggers excessive resource consumption, resulting in a Denial of Service (DoS).\n\nAffected versions:\nSpring Framework 5.3.0 through 5.3.48.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "Maven",
      "name" : "org.springframework:spring-expression"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "last_affected" : "5.3.39"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-41849"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/spring-projects/spring-framework"
  }, {
    "type" : "WEB",
    "url" : "https://spring.io/security/cve-2026-41849"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-190" ],
    "severity" : "HIGH",
    "github_reviewed" : true,
    "github_reviewed_at" : "2026-07-30T16:52:21Z",
    "nvd_published_at" : "2026-06-09T05:16:37Z"
  }
}