Vulnerability · Published Aug 27, 2026 · Assigned by vmware
CVE-2026-47890Spring Framework Server Sent Event stream corruption while rendering fragments
Critical 9.8
In plain English
A critical-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 0.6% (higher than 47% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS 3.1)9.8Critical
Exploit odds (30 days)0.6%top 52.9% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
Spring MVC and WebFlux applications are vulnerable to stream corruption when using Server-Sent Events (SSE) with view fragments. 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 |
|---|---|---|---|
| Maven | org.springframework:spring-webflux | no fix listed | GHSA-j9f9-w8pj-32f8 |
| Maven | org.springframework:spring-webflux | 7.0.9 | GHSA-j9f9-w8pj-32f8 |
| Maven | org.springframework:spring-webmvc | no fix listed | GHSA-j9f9-w8pj-32f8 |
| Maven | org.springframework:spring-webmvc | 7.0.9 | GHSA-j9f9-w8pj-32f8 |
| Ubuntu:26.04:LTS | libspring-java | no fix listed | UBUNTU-CVE-2026-47890 |
| Ubuntu:26.10 | libspring-java | no fix listed | UBUNTU-CVE-2026-47890 |
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-93 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H