CVE-2026-47889

Spring Framework sameSite Attribute Dropped in JettyCoreServerHttpResponse

State: Published
Severity: 7.5 High
Published: Aug 27, 2026
Updated: Aug 27, 2026
Reserved: May 20, 2026

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

Scores

CVSS	Score	Vector	Source
3.1	7.5 High	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N	CISA-ADP

Weaknesses

CWE-1275 Sensitive Cookie with Improper SameSite Attribute

Affected Products

Product	Versions
Spring FrameworkSpring	7.0.0 through 7.0.8Affected 6.2.0 through 6.2.19Affected

References

https://spring.io/security/cve-2026-47889

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