Security Flaw in Spring Web Services Allows Risky Key Transport Algorithm
CVE-2026-40996

4.8MEDIUM

Key Information:

Vendor

Spring

Status
Spring Web Services
Vendor
CVE Published:
11 June 2026

What is CVE-2026-40996?

A configuration vulnerability in Spring Web Services allows the Wss4jSecurityInterceptor to accept the less secure RSA PKCS#1 v1.5 key transport algorithm by default. This can lead to security risks unless administrators reconfigure the allowances explicitly. This oversight compromises the integrity of inbound WS-Security decryption processes. To enhance security, it is imperative that operators adjust the defaults to prevent possible exploitation.

Affected Version(s)

Spring Web Services 5.0.0 < 5.0.1.1

Spring Web Services 4.1.0 < 4.1.3.1

Spring Web Services 4.0.0 < 4.0.19

References

https://spring.io/security/cve-2026-40996

CVSS V3.1

Score:
4.8
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
Low
Availability:
Low
Attack Vector:
Network
Attack Complexity:
High
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

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