What’s Vulnerable › Vulnerabilities

CVE-2026-41849: Spring Framework Denial of Service via Integer Overflow in SpEL Expressions

• 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-190

Description

An integer overflow vulnerability exists in the evaluation logic of the Spring Expression Language (SpEL). An attacker can exploit this by supplying a specially crafted SpEL expression that triggers excessive resource consumption, resulting in a Denial of Service (DoS). Affected versions: Spring Framework 5.3.0 through 5.3.48.

Affected products

• Spring Framework: from 5.3.0 before 5.3.49 — fixed in 5.3.49
• Spring Framework: from 5.3.0 before 5.3.49 — fixed in 5.3.49

How to fix

Upgrade to a fixed version: Spring Framework 5.3.49; Spring Framework 5.3.49. Check the vendor advisory for mitigations.

References

• https://spring.io/security/cve-2026-41849

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