CVE-2026-41851 PUBLISHED

Spring Framework Denial of Service via Unbounded Cache in SpEL

Assigner: vmware
Reserved: 22.04.2026 Published: 09.06.2026 Updated: 09.06.2026

Applications which accept user-supplied Spring Expression Language (SpEL) expressions may be vulnerable to a Denial of Service (DoS) attack if the evaluation of a SpEL expression triggers unbounded cache growth.

Affected versions: Spring Framework 7.0.0 through 7.0.7; 6.2.0 through 6.2.18; 6.1.0 through 6.1.27; 5.3.0 through 5.3.48.

Metrics

CVSS 3.1

CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
CVSS Score: 5.3

Attack Vector	Network	Scope	Unchanged
Attack Complexity	Low	Confidentiality Impact	None
Privileges Required	None	Integrity Impact	None
User Interaction	None	Availability Impact	Low

CVSS 3.1

Product Status

Vendor	Spring
Product	Spring Framework
Versions	Default: unaffected affected from 7.0.0 to 7.0.8 (excl.) affected from 6.2.0 to 6.2.19 (excl.) affected from 6.1.0 to 6.1.28 (excl.) affected from 5.3.0 to 5.3.49 (excl.)

References

https://spring.io/security/cve-2026-41851

Problem Types

CWE-770: Allocation of Resources Without Limits or Throttling CWE

Impacts

An attacker who can supply user-controlled SpEL expressions to an application that caches parsed expressions can cause unbounded cache growth, resulting in memory exhaustion and denial of service.