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Critical, CVSS 9.8amended

Spring Framework Server Sent Event stream corruption while rendering fragments

CVE-2026-47890GHSA-j9f9-w8pj-32f8

What to do

Partial vendor fix. Follow the primary source's mitigation guidance and check back for a fix.

This page has no inventory attached, so it cannot say whether you are affected. A vendor fix is not proof that your deployment is fixed.

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Affected packages

Sources

Severity and exploitation
Exploitation
No confirmed exploitation recorded. Patch Next marks exploitation only from CISA KEV.
CVSS
9.8 · CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS
  • CVE-2026-47890: 0.56% estimated exploitation activity in the next 30 days; percentile 46.93 (FIRST EPSS, 2026-11-03). This is a model estimate, not proof of exploitation or customer exposure.
Source description

As published by the source; long descriptions are shortened.

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

Dates and revisions
Published by the source
Last modified by the source
Source last checked
  1. Revision 2 · amended ·

    Amended from ghsa record GHSA-j9f9-w8pj-32f8

  2. Revision 1 · created ·

    Published from osv record GHSA-j9f9-w8pj-32f8

Agent brief

Preview the exact text before you copy it. Commands are read-only suggestions; review them before running anything.

# Patch Next advisory brief: CVE-2026-47890

Advisory: Spring Framework Server Sent Event stream corruption while rendering fragments
IDs: CVE-2026-47890, GHSA-j9f9-w8pj-32f8
Record: https://patchnext.com/advisories/cve-2026-47890 (revision 2, source checked 26 Oct 2026, 16:58 UTC)
Inventory: none attached. This brief comes from a public page and does not say whether any deployment is affected.
Severity: Critical (CVSS 9.8)
Exploitation: no confirmed exploitation recorded. Patch Next confirms exploitation only from CISA KEV.
Vendor response: Partial vendor fix; fixed versions by package: org.springframework:spring-webmvc 7.0.9; org.springframework:spring-webflux 7.0.9. A vendor fix does not mean a deployment is fixed.

## Affected components
- Maven org.springframework:spring-webmvc: affected >= 6.2.0, <= 6.2.19; >= 7.0.0, <= 7.0.8; fixed in 7.0.9
- Maven org.springframework:spring-webflux: affected >= 6.2.0, <= 6.2.19; >= 7.0.0, <= 7.0.8; fixed in 7.0.9

## Suggested inspection (read-only)
- Maven org.springframework:spring-webmvc: check the installed version with your package manager.
- Maven org.springframework:spring-webflux: check the installed version with your package manager.

## Supported action
No complete vendor fix is recorded. Follow the primary source's mitigation guidance and check this record again before closing anything.

## Required regression checks
- Run the test suite and a production build.
- Exercise the features that depend on org.springframework:spring-webmvc, org.springframework:spring-webflux.
- Repeat the inspection and confirm that only fixed versions remain installed.

## Rollback considerations
- Keep the previous lockfile and deployment artifact. Rolling back reinstates the vulnerable version, so apply any documented mitigation while you fix forward.

## Unresolved questions
- Which deployments run an affected version?
- Exploitation status can change. Check again before lowering the priority.
- Mark the work resolved only after the fixed version is verified in production.

## Sources
- Verified: https://osv.dev/vulnerability/GHSA-j9f9-w8pj-32f8 (OSV record GHSA-j9f9-w8pj-32f8 lists affected ranges: Maven org.springframework:spring-webflux >=6.2.0 =7.0.0 =6.2.0 =7.0.0 <7.0.9 (fixed))
- Verified: https://github.com/advisories/GHSA-j9f9-w8pj-32f8 (GitHub-reviewed advisory GHSA-j9f9-w8pj-32f8 lists affected ranges: Maven org.springframework:spring-webflux >=6.2.0 =7.0.0 =6.2.0 =7.0.0 <=7.0.8)

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