CVE-2026-40996: Broadcom Spring Web Services

Medium severity, CVSS 4.8. EPSS: 0.1% chance of exploitation in the next 30 days.

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.

Affected products

• Broadcom Spring Web Services: before 3.1.9 (fixed in 3.1.9); from 4.0.0, before 4.0.19 (fixed in 4.0.19); from 4.1.0, before 4.1.3.1 (fixed in 4.1.3.1); from 5.0.0, before 5.0.1.1 (fixed in 5.0.1.1)

Published 2026-06-11. Last modified 2026-09-04.