---
id: CVE-2026-47889
title: >-
  A WebFlux application running on the Jetty 12 Core reactive adapter serializes
  response cookies without the sameSite attribute.

  Spring Framework 7.0.0 - 7.0.8

  Spring Framework 6.2.0 - 6.2.19
summary: >-
  A WebFlux application running on the Jetty 12 Core reactive adapter serializes
  response cookies without the sameSite attribute.

  Spring Framework 7.0.0 - 7.0.8

  Spring Framework 6.2.0 - 6.2.19
severity: high
cvss: 7.5
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N'
cwe:
  - CWE-1275
vendor: vmware
product: spring_framework
affected:
  - 'spring_framework >= 6.2.0, < 6.2.20'
  - 'spring_framework >= 7.0.0, < 7.0.8.1'
patched:
  - spring_framework 7.0.8.1
published: '2026-08-27'
updated: '2026-09-10'
sourceUpdated: '2026-09-10T14:48:04.053'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-47889'
references:
  - url: 'https://spring.io/security/cve-2026-47889'
    label: security@vmware.com
tags:
  - nvd
  - cve.org
ssvc:
  exploitation: none
  automatable: 'yes'
  technicalImpact: partial
  timestamp: '2026-08-27T14:56:53.721017Z'
ingestedAt: '2026-09-13T19:57:54.615Z'
epss: 0.00253
epssPercentile: 0.17032
---

## Overview

A WebFlux application running on the Jetty 12 Core reactive adapter serializes response cookies without the sameSite attribute.
Spring Framework 7.0.0 - 7.0.8
Spring Framework 6.2.0 - 6.2.19

## Affected

- `spring_framework >= 6.2.0, < 6.2.20`
- `spring_framework >= 7.0.0, < 7.0.8.1`

## Remediation

Upgrade past the affected range:

- `spring_framework 7.0.8.1`