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Fencer Vulns
low 3.1

CVE-2026-22741 json

Static resource cache poisoning in Spring MVC and WebFlux

published 2026-04-29 6 mo ago modified 2026-10-26 13 d ago also GHSA-wg35-8jpf-2xv3 , EUVD-2026-26206

cvss
3.1
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.2%
EPSS 0.2% chance of exploitation in 30 days, percentile 14%
public exploits
0
none known

Summary

Spring MVC and WebFlux applications are vulnerable to cache poisoning when resolving static resources.

More precisely, an application can be vulnerable when all the following are true:

* the application is using Spring MVC or Spring WebFlux * the application is configuring the  resource chain support https://docs.spring.io/spring-framework/reference/web/webmvc/mvc-config/static-resources.html#page-title  with caching enabled * the application adds support for encoded resources resolution * the resource cache must be empty when the attacker has access to the application

When all the conditions above are met, the attacker can send malicious requests and poison the resource cache with resources using the wrong encoding. This can cause a denial of service by breaking the front-end application for clients.

Patch / fix

  • maven org.springframework:spring-webflux 6.2.18, 7.0.7
  • maven org.springframework:spring-webmvc 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-2026-22741 updated cvss 5.9

Spring MVC: Spring WebFlux: Spring MVC and Spring WebFlux: Denial of Service via cache poisoning

  • Red Hat AMQ Broker 7 spring-webmvc Red Hat build of Apache Camel - HawtIO 4 spring-webmvc, spring-webflux Red Hat build of Apache Camel for Spring Boot 4 spring-webmvc Red Hat build of OptaPlanner 8 spring-webmvc Red Hat Data Grid 8 spring-webmvc Red Hat Enterprise Linux 8 log4j, resteasy, log4j-jcl, log4j-web, log4j-slf4j, resteasy-javadoc
    affected: workaround, no fix available “Fix deferred”
  • Red Hat Enterprise Linux 9 log4j, resteasy, log4j-jcl, log4j-slf4j, pki-resteasy-core, pki-resteasy-client, +2 more
    affected: workaround, no fix available, no fix planned “Out of support scope”
  • Red Hat Fuse 7 spring-webmvc, spring-webflux Red Hat JBoss Enterprise Application Platform 7 spring-webmvc, spring-webflux Red Hat JBoss Enterprise Application Platform 8 spring-webmvc, spring-webflux Red Hat JBoss Enterprise Application Platform Expansion Pack spring-webmvc, spring-webflux Red Hat OpenShift Dev Spaces devspaces/openvsx-rhel9, devspaces/pluginregistry-rhel9 Red Hat Process Automation 7 spring-webmvc
    +1 more products
    Red Hat Single Sign-On 7 spring-webmvc
    affected: workaround, no fix available “Fix deferred”

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

0.24% chance of exploitation in the next 30 days, higher than 14% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

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

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
maven org.springframework:spring-webmvc
>=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-524 Use of Cache Containing Sensitive Information
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.