CVE-2026-47890: Spring Framework Spring Framework Server Sent Event Vulnerability

CRITICAL
Advisory Identifier: GHSA-j9f9-w8pj-32f8
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CVSS 9.8
CWE-93
Published
Advisory Summary

CVE-2026-47890 is a CRITICAL (CVSS 9.8) spring framework server sent event vulnerability (CWE-93: Improper Neutralization of CRLF Sequences ('CRLF Injection')) affecting Spring Framework libraries in the Maven ecosystem. The issue involves spring framework server sent event stream corruption while rendering fragments. Remediation is available by upgrading affected packages to version 7.0.9.

CVE-2026-47890 at a Glance

CVE Identifier CVE-2026-47890
GHSA Identifier GHSA-j9f9-w8pj-32f8
Severity CRITICAL
CVSS v3.1 Base Score 9.8
CWE Classification CWE-93: Improper Neutralization of CRLF Sequences ('CRLF Injection')
Affected Product Spring Framework
Package Ecosystem Maven
Published Date
Last Updated

Security Impact

CVSS: 9.8

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:H/I:H/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 High (C:H)
Integrity High (I:H)
Availability High (A:H)

How to Fix CVE-2026-47890

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-webflux fixed: Latest secure release 
<dependency>
    <groupId>org.springframework</groupId>
    <artifactId>spring-webflux</artifactId>
    <version>Latest secure release</version>
</dependency>
org.springframework:spring-webflux fixed: 7.0.9 
<dependency>
    <groupId>org.springframework</groupId>
    <artifactId>spring-webflux</artifactId>
    <version>7.0.9</version>
</dependency>
org.springframework:spring-webmvc fixed: Latest secure release 
<dependency>
    <groupId>org.springframework</groupId>
    <artifactId>spring-webmvc</artifactId>
    <version>Latest secure release</version>
</dependency>
org.springframework:spring-webmvc fixed: 7.0.9 
<dependency>
    <groupId>org.springframework</groupId>
    <artifactId>spring-webmvc</artifactId>
    <version>7.0.9</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-2026-47890, 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 7.0.9), 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-93: Improper Neutralization of CRLF Sequences ('CRLF Injection'), where the product uses crlf (carriage return line feeds) as a special element, e.g. to separate lines or records, but it does not neutralize or incorrectly neutralizes crlf sequences from inputs. 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

Spring MVC and WebFlux applications are vulnerable to stream corruption when using Server-Sent Events (SSE) with view fragments. Spring Framework 7.0.0 - 7.0.8 Spring Framework 6.2.0 - 6.2.19

CVE-2026-47890 Affected Spring Framework Versions

4 component(s)
Fixed Versions:
7.0.9
Product / Package Ecosystem Affected Versions Fixed Version
org.springframework:spring-webflux
maven/org.springframework/spring-webflux
Maven
≥ 6.2.0
≤ 6.2.19
org.springframework:spring-webflux
maven/org.springframework/spring-webflux
Maven
≥ 7.0.0
< 7.0.9
7.0.9
org.springframework:spring-webmvc
maven/org.springframework/spring-webmvc
Maven
≥ 6.2.0
≤ 6.2.19
org.springframework:spring-webmvc
maven/org.springframework/spring-webmvc
Maven
≥ 7.0.0
< 7.0.9
7.0.9

References

NVD — CVE-2026-47890 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-47890
Spring Framework Source Repository REPOSITORY
https://github.com/spring-projects/spring-framework
Spring Framework Security Information SECURITY
https://spring.io/security/cve-2026-47890

Frequently Asked Questions

What is CVE-2026-47890?
CVE-2026-47890 is a security vulnerability in Spring Framework involving Spring Framework Server Sent Event stream corruption while rendering fragments under CWE-93: Improper Neutralization of CRLF Sequences ('CRLF Injection').
Which Spring Framework versions are affected?
Affected versions include releases prior to 7.0.9 across affected packages: org.springframework:spring-webflux, org.springframework:spring-webmvc.
What version fixes CVE-2026-47890?
Upgrading to 7.0.9 (or the latest patched release for your respective branch) resolves the vulnerability.
Is spring-webflux affected?
Yes, org.springframework:spring-webflux is affected in releases prior to Latest secure release, 7.0.9. Upgrade your dependency to Latest secure release, 7.0.9 or later.
Is spring-webmvc affected?
Yes, org.springframework:spring-webmvc is affected in releases prior to Latest secure release, 7.0.9. Upgrade your dependency to Latest secure release, 7.0.9 or later.
What is the CVSS score of CVE-2026-47890?
CVE-2026-47890 has a CVSS v3.1 base score of 9.8 (CRITICAL) with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
What CWE is associated with CVE-2026-47890?
CVE-2026-47890 is classified under CWE-93: Improper Neutralization of CRLF Sequences ('CRLF Injection') (The product uses CRLF (carriage return line feeds) as a special element, e.g. to separate lines or records, but it does not neutralize or incorrectly neutralizes CRLF sequences from inputs.).
How can I check Maven dependencies for CVE-2026-47890?
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-j9f9-w8pj-32f8",
  "modified" : "2026-10-07T13:20:36Z",
  "published" : "2026-08-27T06:31:34Z",
  "aliases" : [ "CVE-2026-47890" ],
  "summary" : "Spring Framework Server Sent Event stream corruption while rendering fragments",
  "details" : "Spring MVC and WebFlux applications are vulnerable to stream corruption when using Server-Sent Events (SSE) with view fragments.\nSpring Framework 7.0.0 - 7.0.8\nSpring Framework 6.2.0 - 6.2.19",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "Maven",
      "name" : "org.springframework:spring-webflux"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "6.2.0"
      }, {
        "last_affected" : "6.2.19"
      } ]
    } ]
  }, {
    "package" : {
      "ecosystem" : "Maven",
      "name" : "org.springframework:spring-webflux"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "7.0.0"
      }, {
        "fixed" : "7.0.9"
      } ]
    } ],
    "database_specific" : {
      "last_known_affected_version_range" : "<= 7.0.8"
    }
  }, {
    "package" : {
      "ecosystem" : "Maven",
      "name" : "org.springframework:spring-webmvc"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "6.2.0"
      }, {
        "last_affected" : "6.2.19"
      } ]
    } ]
  }, {
    "package" : {
      "ecosystem" : "Maven",
      "name" : "org.springframework:spring-webmvc"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "7.0.0"
      }, {
        "fixed" : "7.0.9"
      } ]
    } ],
    "database_specific" : {
      "last_known_affected_version_range" : "<= 7.0.8"
    }
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-47890"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/spring-projects/spring-framework"
  }, {
    "type" : "WEB",
    "url" : "https://spring.io/security/cve-2026-47890"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-93" ],
    "severity" : "CRITICAL",
    "github_reviewed" : true,
    "github_reviewed_at" : "2026-10-07T13:20:36Z",
    "nvd_published_at" : "2026-08-27T06:17:20Z"
  }
}