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Fencer Vulns
critical 9.8

CVE-2026-47890 in the critical feed json

Spring Framework Server Sent Event stream corruption while rendering fragments

published 2026-08-27 2 mo ago modified 2026-10-07 32 d ago also GHSA-j9f9-w8pj-32f8 , EUVD-2026-66858

cvss
9.8
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.6%
EPSS 0.6% chance of exploitation in 30 days, percentile 47%
public exploits
0
none known

Summary

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

Patch / fix

  • maven org.springframework:spring-webflux 7.0.9
  • maven org.springframework:spring-webmvc 7.0.9
  • vmware spring_framework 6.2.20, 7.0.8.1

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2026-47890 updated cvss 6.5

org.springframework/spring-webmvc: org.springframework/spring-webflux: Spring Framework: Stream corruption in Server-Sent Events (SSE) with view fragments

  • Red Hat build of Apache Camel - HawtIO 4 spring-webmvc
    affected: workaround, no fix available “Disable view fragment rendering within Server-Sent Event (SSE) endpoints and emit fully instantiated responses or standardized DTOs instead.”
  • Red Hat OpenShift Dev Spaces 3.31 devspaces/openvsx-rhel9 1792494821, devspaces/pluginregistry-rhel9 1792495212
    fixed: vendor fix “Disable view fragment rendering within Server-Sent Event (SSE) endpoints and emit fully instantiated responses or standardized DTOs instead.” RHSA-2026:90321
  • Red Hat OpenShift Dev Spaces 3.31 devspaces/udi-rhel9 1792708612, devspaces/code-rhel9 1792599388, devspaces/server-rhel9 1792775639, devspaces/traefik-rhel9 1792464177, devspaces/udi-base-rhel9 1792686842, devspaces/code-sshd-rhel9 1792598059, +8 more
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
none
Automatable
yes
Technical impact
total
Assessed
2 mo ago

Exploit prediction

0.56% chance of exploitation in the next 30 days, higher than 47% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CISA ADP 3.1 9.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CNA 3.1 9.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
GitHub 3.1 9.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected packages

ecosystem package affected fixed in
maven org.springframework:spring-webflux
>=6.2.0, <=6.2.19
>=7.0.0, <7.0.9
7.0.9
maven org.springframework:spring-webmvc
>=6.2.0, <=6.2.19
>=7.0.0, <7.0.9
7.0.9

Affected products

  • Spring Spring Framework

Classification

Weakness
  • CWE-93 Improper Neutralization of CRLF Sequences
Technology feeds

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.