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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
2026-06-09
Advisory published
2026-06-09
Advisory updated
2026-06-09

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].

Official resources

CVE-2026-41840 was published on 2026-06-09T05:16:35.967Z and modified on 2026-06-09T20:38:34.420Z.