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Spring MVC and WebFlux applications are vulnerable to Denial of Service attacks when resolving static resources

Moderate severity GitHub Reviewed Published Apr 29, 2026 to the GitHub Advisory Database • Updated May 6, 2026

Package

maven org.springframework:spring-webflux (Maven)

Affected versions

>= 7.0.0, <= 7.0.6
>= 6.2.0, <= 6.2.17
>= 6.1.0, <= 6.1.26
<= 5.3.47

Patched versions

7.0.7
6.2.18
maven org.springframework:spring-webmvc (Maven)
>= 7.0.0, <= 7.0.6
>= 6.2.0, <= 6.2.17
>= 6.1.0, <= 6.1.26
<= 5.3.47
7.0.7
6.2.18

Description

Spring MVC and WebFlux applications are vulnerable to Denial of Service attacks 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 serving static resources from the file system
  • the application is running on a Windows platform

When all the conditions above are met, the attacker can send malicious requests that are slow to resolve and that can keep HTTP connections in use. This can cause a Denial of Service on the application.

References

Published by the National Vulnerability Database Apr 29, 2026
Published to the GitHub Advisory Database Apr 29, 2026
Last updated May 6, 2026
Reviewed May 6, 2026

Severity

Moderate

CVSS overall score

This score calculates overall vulnerability severity from 0 to 10 and is based on the Common Vulnerability Scoring System (CVSS).
/ 10

CVSS v3 base metrics

Attack vector
Network
Attack complexity
Low
Privileges required
None
User interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
Low

CVSS v3 base metrics

Attack vector: More severe the more the remote (logically and physically) an attacker can be in order to exploit the vulnerability.
Attack complexity: More severe for the least complex attacks.
Privileges required: More severe if no privileges are required.
User interaction: More severe when no user interaction is required.
Scope: More severe when a scope change occurs, e.g. one vulnerable component impacts resources in components beyond its security scope.
Confidentiality: More severe when loss of data confidentiality is highest, measuring the level of data access available to an unauthorized user.
Integrity: More severe when loss of data integrity is the highest, measuring the consequence of data modification possible by an unauthorized user.
Availability: More severe when the loss of impacted component availability is highest.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

EPSS score

Exploit Prediction Scoring System (EPSS)

This score estimates the probability of this vulnerability being exploited within the next 30 days. Data provided by FIRST.
(27th percentile)

Weaknesses

Uncontrolled Resource Consumption

The product does not properly control the allocation and maintenance of a limited resource. Learn more on MITRE.

CVE ID

CVE-2026-22745

GHSA ID

GHSA-6p4f-wcwh-5vvm

Source code

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