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CVE-2026-47890 — Vulnerability in...

CRITICAL

Spring Framework Server Sent Event stream corruption while rendering fragments

Published August 27, 2026Updated October 7, 2026Source: osv

Summary

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

Advisory Timeline

  • First published August 27, 2026 (46 days ago).
  • Last revised October 7, 2026 — 41 days after initial publication.

Remediation

Upgrade to the fixed version using your package manager.

Maven
Update org.springframework:spring-webflux to 7.0.9 or later
<!-- Update pom.xml dependency version to 7.0.9 for org.springframework:spring-webflux -->
Maven
Update org.springframework:spring-webmvc to 7.0.9 or later
<!-- Update pom.xml dependency version to 7.0.9 for org.springframework:spring-webmvc -->

After upgrading, run your dependency scanner again to confirm the vulnerability is resolved.

Affected Packages (4)

Affects 1 ecosystem: maven (2).

PackageEcosystemAffectedFixed In
org.springframework:spring-webmvc
maven
6.2.0, 6.2.1, 6.2.10, 6.2.11 (+16 more)Range-based data available
org.springframework:spring-webflux
maven
7.0.0, 7.0.1, 7.0.2, 7.0.3 (+5 more)7.0.9
org.springframework:spring-webmvc
maven
7.0.0, 7.0.1, 7.0.2, 7.0.3 (+5 more)7.0.9
org.springframework:spring-webflux
maven
6.2.0, 6.2.1, 6.2.10, 6.2.11 (+16 more)Range-based data available

Vulnerability Classification

Common Weakness Enumeration (CWE) identifiers for this vulnerability type.

CVSS Score Breakdown

What the CVSS (Common Vulnerability Scoring System) 9.8 score means for each attack dimension.

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

References

Frequently Asked Questions

What is CVE-2026-47890?
Spring Framework Server Sent Event stream corruption while rendering fragments This vulnerability has been assigned a severity rating of CRITICAL (CVSS score: 9.8/10).
How do I check if my project is affected by CVE-2026-47890?
CVE-2026-47890 affects org.springframework:spring-webmvc and org.springframework:spring-webflux. Use GeekWala's free vulnerability scanner to check your dependencies against CVE-2026-47890 and 200,000+ other known vulnerabilities.

Severity & Exploitability

CVSS Score
9.8

Exploitation is straightforward and causes maximum impact. Patch immediately.

Also Known As

GHSA-j9f9-w8pj-32f8

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