CVE-2026-47889
Received Received - Intake

Missing SameSite Attribute in Spring Framework WebFlux Cookies

Publication date: 2026-08-27

Last updated on: 2026-08-27

Assigner: VMware

Description
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

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Meta Information

Published
2026-08-27
Last Modified
2026-08-27
Generated
2026-08-27
AI Q&A
2026-08-27
EPSS Evaluated
N/A
NVD
CVE-2026-47889
EUVD
EUVD-2026-66857

Affected Vendors & Products

Showing 4 associated CPEs
Vendor Product Version / Range
spring_project spring_framework From 6.2.0 (inc) to 6.2.19 (inc)
spring_project spring_framework From 7.0.0 (inc) to 7.0.8 (inc)
spring framework From 7.0.0 (inc) to 7.0.8 (inc)
spring framework From 6.2.0 (inc) to 6.2.19 (inc)

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Exploitability

CWE
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KEV
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CWE ID Description
CWE-UNKNOWN

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Executive Summary

This vulnerability involves a WebFlux application using the Jetty 12 Core reactive adapter that incorrectly serializes response cookies without setting the sameSite attribute. The sameSite attribute helps prevent cross-site request forgery (CSRF) attacks by controlling whether cookies are sent with cross-site requests.

Detection Guidance

This vulnerability is specific to Spring Framework versions 7.0.0-7.0.8 and 6.2.0-6.2.19 running on Jetty 12 Core reactive adapter. Detection involves checking the Spring Framework version in use. For Maven projects, run: mvn dependency:tree | grep spring-framework. For Gradle, run: gradle dependencies | grep spring-framework. If affected versions are found, upgrade to fixed versions 7.0.9 or 6.2.20.

Impact Analysis

This vulnerability could allow attackers to perform CSRF attacks by tricking users into submitting authenticated requests without their knowledge. This may lead to unauthorized actions being performed on behalf of the user, potentially compromising sensitive data or account integrity.

Compliance Impact

This vulnerability could potentially impact compliance with GDPR and HIPAA due to the lack of sameSite attribute on cookies, which may expose sensitive data to cross-site request forgery (CSRF) attacks. Without proper cookie security, unauthorized access to user data could violate privacy requirements under these regulations.

Mitigation Strategies

Upgrade Spring Framework to fixed versions: 7.0.9 (OSS) or 7.0.8.1 (Enterprise Support Only) for version 7, and 6.2.20 (Enterprise Support Only) for version 6. No additional mitigation steps are required beyond upgrading.

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