Home/Vulnerability/CVE-2026-40996

CVE-2026-40996

Inbound WS-Security allows RSA PKCS#1 v1.5 key transport by default

Published: Jun 11, 2026Updated: Jun 11, 2026 Sources: CVE List NVD

4.8CVSS

MEDIUM

Wss4jSecurityInterceptor defaulted allowRSA15KeyTransportAlgorithm to true, overriding Apache WSS4J's safer default for validation RequestData. Inbound WS-Security decryption could therefore accept RSA PKCS#1 v1.5 (rsa-1_5) encrypted key material unless operators explicitly reconfigured the flag. Affected versions: Spring Web Services 5.0.0 through 5.0.1; 4.1.0 through 4.1.3; 4.0.0 through 4.0.18; 3.1.0 through 3.1.8.

EPSS Score

N/A

CISA KEV

Not in KEV

Exploits

No Known Exploits

Remediation

No Fix Available

CVSS Vector Breakdown

Exploitability

AV:NAttack Vector

Network

AC:HAttack Complexity

High

PR:NPrivileges Required

None

UI:NUser Interaction

None

Scope

S:UScope

Unchanged

Impact

C:LConfidentiality

Low

I:LIntegrity

Low

A:NAvailability

None

Weaknesses

CWE-327

Affected Products

Spring Web Services

Spring

Attack Graph

Products CVE Techniques Tactics

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Exploitability

No known exploits, KEV entries, or remediation guidance available for this vulnerability yet.

MITRE ATT&CK

1 technique

Collection

View detailed technique mapping

References

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

spring.io

Timeline

Published

Jun 11, 2026

Last Updated

Jun 11, 2026

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