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CVE-2026-40994 Spring CVE debrief

CVE-2026-40994 is a HIGH severity vulnerability with a CVSS score of 8.2. The Wss4jSecurityInterceptor initialized its BSP (WS-I Basic Security Profile) compliance flag so that inbound validation disabled WSS4J BSP enforcement on RequestData. This allows services that validate WS-Security on the network to accept messages that violate BSP rules, weakening protocol-level checks. Affected versions include Spring Web Services 5.0.0 through 5.0.1, 4.1.0 through 4.1.3, 4.0.0 through 4.0.18, and 3.1.0 through 3.1.8.

Vendor
Spring
Product
Spring Web Services
CVSS
HIGH 8.2
CISA KEV
Not listed in stored evidence
Original CVE published
2026-06-11
Original CVE updated
2026-09-04
Advisory published
2026-06-11
Advisory updated
2026-09-04

Who should care

Users of Spring Web Services 5.0.0 through 5.0.1, 4.1.0 through 4.1.3, 4.0.0 through 4.0.18, and 3.1.0 through 3.1.8 should be aware of this vulnerability and take steps to mitigate it.

Technical summary

The Wss4jSecurityInterceptor's BSP compliance flag was initialized in a way that disabled WSS4J BSP enforcement on RequestData. This could allow services validating WS-Security on the network to accept messages violating BSP rules.

Defensive priority

HIGH

Recommended defensive actions

  • Upgrade to a non-affected version of Spring Web Services.
  • Implement additional security measures to validate WS-Security messages.

Evidence notes

The CVE was published on 2026-06-11T07:16:27.297Z and last modified on 2026-06-11T15:21:30.653Z. The CVSS vector is CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:N.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-40994 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-40994

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

  • CVE-2026-40994 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-40994

    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.