Vulnerability · Published Aug 27, 2026 · Assigned by vmware
CVE-2026-47889Spring Framework sameSite Attribute Dropped in JettyCoreServerHttpResponse
High 7.5
In plain English
A high-severity security flaw in Spring Framework from Spring. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 37% of all known vulnerabilities).
Severity (CVSS 3.1)7.5High
Exploit odds (30 days)0.4%top 62.7% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official 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
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu:26.04:LTS | libspring-java | no fix listed | UBUNTU-CVE-2026-47889 |
| Ubuntu:26.10 | libspring-java | no fix listed | UBUNTU-CVE-2026-47889 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Spring | Spring Framework | 7.0.0 – through 7.0.86.2.0 – through 6.2.19 |
Weakness: CWE-1275 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N