CVE-2026-47890
Description
A flaw was found in Spring Framework, affecting its MVC and WebFlux applications. When these applications use Server-Sent Events (SSE) with view fragments, a vulnerability allows for stream corruption. This can lead to unreliable data delivery and potential disruption of services.
Statement
Stream corruption vulnerability in Spring Framework WebFlux and MVC when rendering Server-Sent Events (SSE) with view fragments allows remote unauthenticated attackers to disrupt stream integrity. Exploitation requires attacker control over streamed data, resulting in malformed SSE responses, application state desynchronization, or cross-user data presentation issues. Attack vector is limited to endpoints explicitly rendering view fragments over SSE channels.
Mitigation
Disable view fragment rendering within Server-Sent Event (SSE) endpoints and emit fully instantiated responses or standardized DTOs instead.
Common Vulnerability Scoring System (CVSS) Score Details
Info alert:Important note
CVSS scores for open source components depend on vendor-specific factors (e.g. version or build chain). Therefore, Red Hat's score and impact rating can be different from NVD and other vendors. Red Hat remains the authoritative CVE Naming Authority (CNA) source for its products and services (see Red Hat classifications).
The following CVSS metrics and score provided are preliminary and subject to review.
CVSS v3 Score Breakdown
| Red Hat | NVD | cve.org | |
|---|---|---|---|
| Base Score | 6.5 | N/A | 9.8 |
| Attack Vector | Network | N/A | Network |
| Attack Complexity | Low | N/A | Low |
| Privileges Required | None | N/A | None |
| User Interaction | None | N/A | None |
| Scope | Unchanged | N/A | Unchanged |
| Confidentiality | None | N/A | High |
| Integrity Impact | Low | N/A | High |
| Availability Impact | Low | N/A | High |
Vector
Red Hat: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L
cve.org: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Understanding the Weakness (CWE)
Integrity
Technical Impact: Modify Application Data
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