CVE-2026-41842Network attack vector

Service interruption via slow versioned-resource resolution

Published Jun 9, 2026 · Updated Jun 9, 2026

Denial of service in Spring Framework allows remote attackers to exhaust HTTP connections via crafted versioned static-resource requests. The VersionResourceResolver path in Spring MVC and WebFlux performs slow filesystem-backed resource resolution for malicious paths, leaving connections occupied. Exposure requires an affected release, MVC or WebFlux, filesystem-served static resources, and configured versioned-resource support; successful requests interrupt application availability.

CVSS severity7.5
High
EPSS probability0.40%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Denial of service in Spring Framework allows remote attackers to exhaust HTTP connections via crafted versioned static-resource requests. The VersionResourceResolver path in Spring MVC and WebFlux performs slow filesystem-backed resource resolution for malicious paths, leaving connections occupied. Exposure requires an affected release, MVC or WebFlux, filesystem-served static resources, and configured versioned-resource support; successful requests interrupt application availability.

The record

CVE
CVE-2026-41842
Published
Jun 9, 2026
Updated
Jun 9, 2026
Vendor
Spring
Product
Spring Framework
Classifications
CWE-400, T1499.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jun 9, 2026CVE publishedPublication date reported by the CVE source.
  2. Jun 9, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=5.3.0 <5.3.49
  2. Affected versionversion=6.1.0 <6.1.28
  3. Affected versionversion=6.2.0 <6.2.19
  4. Affected versionversion=7.0.0 <7.0.8

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Spring · Spring Frameworkversion=5.3.0 <5.3.49; version=6.1.0 <6.1.28; version=6.2.0 <6.2.19; version=7.0.0 <7.0.8

Published CVSS scores

7.5VMwareCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-400Uncontrolled Resource Consumption
T1499.004Application or System Exploitation

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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