Severity by source
AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Primary rating from Vendor (vmware).
CVSS VectorVendor: vmware
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Lifecycle Timeline
2Blast Radius
ecosystem impact- 1,445 maven packages depend on org.springframework:spring-expression (71 direct, 1,375 indirect)
Ecosystem-wide dependent count for version 5.3.39.
DescriptionCVE.org
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.
Articles & Coverage 1
AnalysisAI
Denial of service in Spring Framework 5.3.0 through 5.3.48 allows remote unauthenticated attackers to exhaust server resources by submitting crafted Spring Expression Language (SpEL) expressions that trigger an integer overflow during evaluation. The CVSS 7.5 score reflects high availability impact with no confidentiality or integrity loss, and no public exploit identified at time of analysis. Applications that evaluate untrusted SpEL input are at greatest risk.
Technical ContextAI
Spring Expression Language (SpEL) is the embedded expression engine in the Spring Framework used for querying and manipulating object graphs at runtime, commonly invoked in annotations such as @Value, security expressions, data binding, and templated configuration. The flaw is classified as CWE-190 (Integer Overflow or Wraparound) inside the SpEL evaluation logic, where arithmetic on attacker-controlled values wraps past native integer bounds and drives downstream loops or allocations into excessive CPU or memory consumption. The CPE cpe:2.3:a:spring:spring_framework:*:*:*:*:*:*:*:* confirms the issue is in the core spring-framework artifact rather than a specific subproject like Spring Boot or Spring Security.
RemediationAI
Patch availability is not explicitly stated in the provided input - refer to the vendor advisory at https://spring.io/security/cve-2026-41849 for the fixed 5.3.x maintenance release and any 6.x guidance, and upgrade spring-core/spring-expression to the listed version. As compensating controls when an immediate upgrade is not possible, never pass untrusted input directly into SpEL evaluation: avoid building SpEL expressions from request parameters, JSON bodies, or templated user content; use a SimpleEvaluationContext rather than StandardEvaluationContext to constrain expression capabilities; and add a length/complexity cap on any expression strings before evaluation to limit resource consumption. Trade-offs: SimpleEvaluationContext blocks property writes and method invocation, which may break features that rely on dynamic invocation, and input length limits may reject legitimate complex expressions in rule-engine use cases.
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Same weakness CWE-190 – Integer Overflow or Wraparound
View allSame technique Denial Of Service
View allVendor StatusVendor
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External POC / Exploit Code
Leaving vuln.today
EUVD-2026-35337
GHSA-775g-4xr8-78h8