CVE-2026-41854: Spring Framework Server-Side Request Forgery via UriComponentsBuilder

Severity: medium (CVSS 6.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.1% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-06-09 · updated 2026-07-23
Weakness: CWE-918

Description

Due to incorrect host parsing, applications that rely on UriComponentsBuilder to parse and validate an externally provided URL string may be exposed to a server-side request forgery (SSRF) attack. Affected versions: Spring Framework 7.0.0 through 7.0.7; 6.2.0 through 6.2.18.

Affected products

Spring Framework: from 6.2.0 before 6.2.18.1; from 7.0.0 before 7.0.7.1 — fixed in 6.2.18.1, 7.0.7.1
Spring Framework: from 7.0.0 before 7.0.7.1; from 6.2.0 before 6.2.18.1 — fixed in 7.0.7.1, 6.2.18.1

How to fix

Upgrade to a fixed version: Spring Framework 6.2.18.1, 7.0.7.1; Spring Framework 7.0.7.1, 6.2.18.1. Check the vendor advisory for mitigations.

References

https://spring.io/security/cve-2026-41854

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