CVE-2026-40996 json
Inbound WS-Security allows RSA PKCS#1 v1.5 key transport by default
published 4mo ago modified 2mo ago also GHSA-p7qj-2q5w-f9r7 , EUVD-2026-36206
- cvss
- 4.8
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.1%
- EPSS 0.1% chance of exploitation in 30 days, percentile 2%
- public exploits
- 0
- none known
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 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.
Patch / fix
- maven org.springframework.ws:spring-ws-security 4.1.4, 5.0.2
- Spring Spring Web Services 3.1.9, 4.0.19, 4.1.3.1, 5.0.1.1
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Check with FencerCISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- partial
- Assessed
- 4mo ago
Exploit prediction
0.13% chance of exploitation in the next 30 days, higher than 2% of all scored CVEs (FIRST EPSS, 2026-11-09).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 4.8 | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N |
| GitHub | 3.1 | 4.8 | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| maven | org.springframework.ws:spring-ws-security | >=5.0.0, <5.0.2 >=4.1.0, <4.1.4 >=4.0.0, <=4.0.18 >=3.1.0, <=3.1.8 |
5.0.2 4.1.4 |
Affected products
- Spring Spring Web Services
Classification
- Weakness
-
- CWE-327 Use of a Broken or Risky Cryptographic Algorithm
References
-
spring.io
/security/cve-2026-40996
web, vendor-advisory, mitigation
-
nvd.nist.gov
/vuln/detail/CVE-2026-40996
advisory
-
github.com
/spring-projects/spring-ws
package
Sources
- CVE List CVE-2026-40996
- GitHub Advisory GHSA-p7qj-2q5w-f9r7
- NVD CVE-2026-40996
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