CVE-2026-40999 PUBLISHED

Spring WS SSRF via unvalidated WS-Addressing reply destinations

Assigner: vmware
Reserved: 16.04.2026 Published: 11.06.2026 Updated: 11.06.2026

When WS-Addressing is used with non-anonymous ReplyTo or FaultTo addresses, Spring WS may initiate outbound connections through configured WebServiceMessageSender instances to destinations taken directly from request headers without verifying that those destinations are safe to connect to.

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.

Metrics

CVSS 3.1

CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N
CVSS Score: 8.6

Attack Vector	Network	Scope	Changed
Attack Complexity	Low	Confidentiality Impact	High
Privileges Required	None	Integrity Impact	None
User Interaction	None	Availability Impact	None

CVSS 3.1

Product Status

Vendor	Spring
Product	Spring Web Services
Versions	Default: unaffected affected from 5.0.0 to 5.0.2 (excl.) affected from 4.1.0 to 4.1.4 (excl.) affected from 4.0.0 to 4.0.19 (excl.) affected from 3.1.0 to 3.1.9 (excl.)

References

https://spring.io/security/cve-2026-40999

Problem Types

CWE-918: Server-Side Request Forgery (SSRF) CWE

Impacts

A remote attacker can supply crafted WS-Addressing ReplyTo or FaultTo headers that cause the server to initiate outbound connections to internal-only hosts, cloud metadata endpoints, or other sensitive destinations.