CVE-2026-40996

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

State: Published
Severity: 4.8 Medium
Published: Jun 11, 2026
Updated: Jun 23, 2026
Reserved: Apr 16, 2026

Description

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.

Scores

CVSS	Score	Vector	Source
3.1	4.8 Medium	CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N	vmware

Weaknesses

CWE-327 Use of a Broken or Risky Cryptographic Algorithm

Affected Products

Product	Versions
Spring Web ServicesSpring	5.0.0 to before 5.0.1.1Affected 4.1.0 to before 4.1.3.1Affected 4.0.0 to before 4.0.19Affected 3.1.0 to before 3.1.9Affected

References

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

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