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PatchSiren cyber security CVE debrief

CVE-2026-41840 Spring CVE debrief

A Denial of Service (DoS) vulnerability was discovered in Spring WebFlux applications when processing multipart requests. This vulnerability affects Spring Framework versions 7.0.0 through 7.0.7, 6.2.0 through 6.2.18, 6.1.0 through 6.1.27, and 5.3.0 through 5.3.48.

Vendor
Spring
Product
Spring Framework
CVSS
MEDIUM 5.9
CISA KEV
Not listed in stored evidence
Original CVE published
2026-06-09
Original CVE updated
2026-06-26
Advisory published
2026-06-09
Advisory updated
2026-06-26

Who should care

Developers and administrators using Spring Framework versions 7.0.0 through 7.0.7, 6.2.0 through 6.2.18, 6.1.0 through 6.1.27, and 5.3.0 through 5.3.48 should be aware of this vulnerability and take necessary actions to protect their systems.

Technical summary

The vulnerability has a CVSS score of 5.9 and a severity of MEDIUM. The CVSS vector is CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H. The weakness is classified as CWE-400.

Defensive priority

MEDIUM

Recommended defensive actions

  • Upgrade to a non-vulnerable version of Spring Framework.
  • Apply patches or updates provided by the vendor.
  • Implement additional security measures to prevent DoS attacks.

Evidence notes

The vulnerability was published on 2026-06-09T05:16:35.967Z and modified on 2026-06-09T20:38:34.420Z. The CVE record can be found at [cve-org]. The NVD detail can be found at [nvd]. The vendor advisory can be found at [ref-4].

Sources and references

Verified primary and authoritative sources

  • CVE-2026-41840 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-41840

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2026-41840 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-41840

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Supplemental references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.