CVE-2026-41850

Spring Framework Algorithmic Denial of Service via SpEL Expressions

State: Published
Severity: 7.5 High
Published: Jun 9, 2026
Updated: Jun 27, 2026
Reserved: Apr 22, 2026

Description

Applications that evaluate user-supplied Spring Expression Language (SpEL) expressions are vulnerable to an Algorithmic Denial of Service (DoS). By providing a specially crafted expression, an attacker can trigger excessive resource consumption during evaluation, leading to application degradation or unavailability.

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.

Scores

CVSS	Score	Vector	Source
3.1	7.5 High	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H	vmware

Weaknesses

CWE-407 Inefficient Algorithmic Complexity

Affected Products

Product	Versions
Spring FrameworkSpring	7.0.0 to before 7.0.7.1Affected 6.2.0 to before 6.2.18.1Affected 6.1.0 to before 6.1.28Affected 5.3.0 to before 5.3.49Affected

References

https://spring.io/security/cve-2026-41850

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