---
id: CVE-2026-40996
title: >-
  Wss4jSecurityInterceptor defaulted allowRSA15KeyTransportAlgorithm to true,
  overriding Apache WSS4J's safer default for validation RequestData
summary: >-
  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…
severity: medium
cvss: 4.8
cvssVector: 'CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N'
cwe:
  - CWE-327
vendor: broadcom
product: spring_web_services
affected:
  - spring_web_services < 3.1.9
  - 'spring_web_services >= 4.0.0, < 4.0.19'
  - 'spring_web_services >= 4.1.0, < 4.1.3.1'
  - 'spring_web_services >= 5.0.0, < 5.0.1.1'
patched:
  - spring_web_services 5.0.1.1
published: '2026-06-11'
updated: '2026-09-04'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-40996'
references:
  - url: 'https://spring.io/security/cve-2026-40996'
    label: security@vmware.com
tags:
  - nvd
epss: 0.00146
epssPercentile: 0.03161
ingestedAt: '2026-09-05T13:39:55.384Z'
---

## Overview

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

- `spring_web_services < 3.1.9`
- `spring_web_services >= 4.0.0, < 4.0.19`
- `spring_web_services >= 4.1.0, < 4.1.3.1`
- `spring_web_services >= 5.0.0, < 5.0.1.1`

## Remediation

Upgrade past the affected range:

- `spring_web_services 5.0.1.1`