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Fencer Vulns
medium 6.5

CVE-2026-22740 json

Spring Framework DoS with Multipart Temp Files in WebFlux

published 2026-04-29 6 mo ago modified 2026-10-26 13 d ago also GHSA-5843-p793-ghmm , EUVD-2026-26205

cvss
6.5
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.3%
EPSS 0.3% chance of exploitation in 30 days, percentile 28%
public exploits
0
none known

Summary

A WebFlux server application that processes multipart requests creates temp files for parts larger than 10 K. Under some circumstances, temp files may remain not deleted after the request is fully processed. This allows an attacker to consume available disk space.

Older, unsupported versions are also affected.

Patch / fix

  • maven org.springframework:spring-webflux 6.2.18, 7.0.7
  • VMware Spring Framework 5.3.48, 6.1.27, 6.2.18, 7.0.7

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-2026-22740 updated cvss 6.5

spring-webflux: Spring WebFlux: Denial of Service via temporary file accumulation

  • Red Hat build of Apache Camel - HawtIO 4 spring-webflux
    affected: no fix available “Fix deferred”
  • Red Hat Fuse 7 spring-webflux Red Hat JBoss Enterprise Application Platform 7 spring-webflux
    affected: no fix planned “Out of support scope”
  • Red Hat JBoss Enterprise Application Platform 8 spring-webflux, opentelemetry-spring-webflux-5.3, opentelemetry-javaagent-spring-webflux-5.0
    affected: no fix available “Fix deferred”
  • Red Hat JBoss Enterprise Application Platform Expansion Pack spring-webflux, opentelemetry-spring-webflux-5.3, opentelemetry-javaagent-spring-webflux-5.0
    affected: no fix available, no fix planned “Out of support scope”

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
no
Technical impact
partial
Assessed
6 mo ago

Exploit prediction

0.34% chance of exploitation in the next 30 days, higher than 28% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 6.5 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
GitHub 3.1 6.5 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Affected packages

ecosystem package affected fixed in
maven org.springframework:spring-webflux
>=7.0.0, <7.0.7
>=6.2.0, <6.2.18
>=6.1.0, <=6.1.26
<=5.3.47
7.0.7
6.2.18

Affected products

  • VMware Spring Framework

Classification

Weakness
  • CWE-400 Uncontrolled Resource Consumption
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.