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CVE-2026-59276

5.9 · MEDIUM

Several components in Spring Security compare security-sensitive values using standard string equality (String.equals()) rather than a constant-time comparison.

Published Aug 27, 2026CWE-208EPSS 0.33%

Overview

CVE-2026-59276 is a medium-severity vulnerability. It was published on August 27, 2026 and has a CVSS 3.1 base score of 5.9 (MEDIUM).

This vulnerability has a CVSS 3.1 base score of 5.9, rated MEDIUM. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical description

Several components in Spring Security compare security-sensitive values using standard string equality (String.equals()) rather than a constant-time comparison. Because String.equals() returns as soon as it finds a differing character, the time taken to reject an incorrect value is proportional to the number of leading characters that match the expected value.

Spring Security 7.1.0

Spring Security 7.0.0 - 7.0.6

Spring Security 6.5.0 - 6.5.11

Spring Security 6.4.0 - 6.4.18

Spring Security 5.8.0 - 5.8.27

Spring Security 5.7.0 - 5.7.25

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

Refspring.io/security/cve-2026-59276

How CyberStrike helps

Frequently asked questions

What is CVE-2026-59276?

CVE-2026-59276 is a medium-severity vulnerability. It was published on August 27, 2026 and has a CVSS 3.1 base score of 5.9 (MEDIUM).

How severe is CVE-2026-59276?

This vulnerability has a CVSS 3.1 base score of 5.9, rated MEDIUM. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2026-59276?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2026-59276?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-59276 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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