CVE-2026-40996 MEDIUM

CVE-2026-40996: Inbound WS-Security allows RSA PKCS#1 v1.5 key transport by default

Vendor Spring
Product Spring Web Services
Weakness CWE-327 · Broken crypto
Published June 11, 2026
Last update June 11, 2026
View on NVD All CVEs

CVSS base score

4.8/10
Attack vector Network
Attack complexity High
Privileges required None
User interaction None
Confidentiality Low
Integrity Low

CVSS vector

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N

What the vulnerability does

01Description

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.

Key dates

02Disclosure timeline

June 11, 2026 CVE published
June 11, 2026 Record updated