What’s Vulnerable › Vulnerabilities

CVE-2026-41007: Spring HATEOAS heap exhaustion through unbounded internal caching

• Severity: high (CVSS 7.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% 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-770

Description

Spring HATEOAS maintains an unbounded static cache of StringLinkRelation instances keyed on attacker-supplied strings. Affected versions: Spring HATEOAS 1.5.0 through 1.5.6; 2.3.0 through 2.3.4; 2.4.0 through 2.4.1; 2.5.0 through 2.5.2; 3.0.0 through 3.0.3.

Affected products

• Spring HATEOAS: from 1.5.0 before 1.5.7; from 2.3.0 before 2.3.5; from 2.4.0 before 2.4.2; from 2.5.0 before 2.5.2.1; from 3.0.0 before 3.0.3.1 — fixed in 1.5.7, 2.3.5, 2.4.2, 2.5.2.1, 3.0.3.1
• Spring HATEOAS: from 1.5.0 before 1.5.7; from 2.3.0 before 2.3.5; from 2.4.0 before 2.4.2; from 2.5.0 before 2.5.2.1; from 3.0.0 before 3.0.3.1 — fixed in 1.5.7, 2.3.5, 2.4.2, 2.5.2.1, 3.0.3.1

How to fix

Upgrade to a fixed version: Spring HATEOAS 1.5.7, 2.3.5, 2.4.2, 2.5.2.1; Spring HATEOAS 1.5.7, 2.3.5, 2.4.2, 2.5.2.1. Check the vendor advisory for mitigations.

References

• https://spring.io/security/cve-2026-41007

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