CVE-2026-40996

MEDIUM

Spring Web Services - Inbound RSA PKCS#1 v1.5 Key Transport Accepted by Default

Title source: manual

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.

References (1)

Core 1

Core References

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

Scores

CVSS v3 4.8

EPSS 0.0015

EPSS Percentile 4.2%

Attack Vector NETWORK

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

CISA SSVC

Vulnrichment

Exploitation none

Automatable no

Technical Impact partial

Details

CWE

CWE-327

Status published

Products (4)

Spring/Spring Web Services 3.1.0 - 3.1.9

Spring/Spring Web Services 4.0.0 - 4.0.19

Spring/Spring Web Services 4.1.0 - 4.1.4

Spring/Spring Web Services 5.0.0 - 5.0.2

Published Jun 11, 2026

Tracked Since Jun 11, 2026