IP Address Classification Vulnerability in Spring Security by Pivotal
CVE-2026-59277

3.7LOW

Key Information:

Vendor

Spring

Status
Spring Security
Vendor
CVE Published:
27 August 2026

What is CVE-2026-59277?

The Spring Security framework's InetAddressMatchers utility includes functionality to identify whether an IP address is internal or external. However, in version 7.1.0, a critical flaw exists in the matchInternal() and matchExternal() builders, which could lead to misclassification of IP addresses. This vulnerability may compromise the security posture of applications relying on accurate network classification, potentially exposing sensitive data and enabling unauthorized access.

Affected Version(s)

Spring Security 7.1.0

References

https://spring.io/security/cve-2026-59277

CVSS V3.1

Score:
3.7
Severity:
LOW
Confidentiality:
Low
Integrity:
None
Availability:
Low
Attack Vector:
Network
Attack Complexity:
High
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.