What is CVE-2026-40996?

CVE-2026-40996 is a medium-severity vulnerability in Spring Web Services, classified under Use of a Broken or Risky Cryptographic Algorithm. CVSS score: 4.8/10. Published 2026-06-11.

How severe is CVE-2026-40996?

Medium severity. CVSS v3 base score is 4.8 out of 10.

Vulnerability in Spring Web Services

CVE-2026-40996

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 m…

Vulnerability class: POODLE (CVE-2014-3566)

EPSS: 0.001 (2.9th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 4.8 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N.

Affected products

Spring Web Services — versions 5.0.0, 4.1.0, 4.0.0

Weakness classification (CWE)

CWE-327 — Use of a Broken or Risky Cryptographic Algorithm

References

security@vmware.com

Frequently asked questions

What is CVE-2026-40996?: CVE-2026-40996 is a medium-severity vulnerability in Spring Web Services, classified under Use of a Broken or Risky Cryptographic Algorithm. CVSS score: 4.8/10. Published 2026-06-11.
How severe is CVE-2026-40996?: Medium severity. CVSS v3 base score is 4.8 out of 10.