High severity · published Aug 27, 2026
CVE-2026-47889
Spring Framework sameSite Attribute Dropped in JettyCoreServerHttpResponse
7.5
CVSS
0.4%
EPSS
No
On KEV
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
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
High
Integrity
None
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.4% · higher than 37% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
SF
Spring Framework · Spring
7.0.0 through 7.0.8; 6.2.0 through 6.2.19 · source: vendor, NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-47889
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-47889
Vendor Advisory
https://spring.io/security/cve-2026-47889
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