Spring Framework Denial of Service via Integer Overflow in SpEL Expressions
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Denial of service
- Confidentiality · integrity · availability
- None · None · High
- Fix status
- Fixed
Attack profile from CVSS 3.1 · CNA. Fix status from CNA and GitHub. Impact type from CWE-190 and the CVSS impact.
Summary
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.
Why it matters now
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| VMware | Spring Framework | 5.3.0 to before 5.3.49 | 5.3.49 | Patch available | CNA |
| — | org.springframework:spring-expression (Maven) | up to 5.3.39 | — | No fix listed | GHSA-775g-4xr8-78h8 |
- Spring Framework VendorVMware Affected 5.3.0 to before 5.3.49 Fixed in 5.3.49 Patch available CNA
- org.springframework:spring-expression (Maven) Vendor— Affected up to 5.3.39 Fixed in — No fix listed GHSA-775g-4xr8-78h8
Remediation
- Fix · CNA Spring Framework (Spring) Fixed in 5.3.49
Fixed in the same release
Records fixed by the same vendor advisory or release, as the CNA lists them.
- Release ·
Spring Framework 5.3.49
2 records Highest priority Priority LOW 2 LOW
Other records, highest priority first
- TI-2026-30257 Spring Framework Security Filter Bypass in WebFlux Kotlin Router DSLPriority LOW 23
Vendor assessments
Red Hat
Red Hat rating: Important. Red Hat's page for this CVE →
Not affected: 2 products
- OpenShift Developer Tools and Services
- Red Hat OpenShift Dev Spaces
Timeline
- 2026-10-02 Threatist record created from CVE-2026-41849
- 2026-10-03 Alias added: GHSA-775g-4xr8-78h8
References
More VMware Spring Framework vulnerabilities
- TI-2022-07142 Code injection in Spring Framework KEVCVSS 3.1CRITICAL 9.8
- TI-2018-01175 Code injection in Spring Framework CVSS 3.1CRITICAL 9.8
- TI-2020-04444 RFD Attack via "Content-Disposition" Header Sourced from Request Input by Spring MVC or Spring WebFlux Application CVSS 3.1HIGH 7.5
- TI-2018-01180 Code injection in Spring Framework CVSS 3.1CRITICAL 9.8
- TI-2016-09283 Pivotal Spring Framework through 5.3.16 suffers from a potential remote code execution… CVSS 3.1CRITICAL 9.8
- TI-2014-00050 The Jaxb2RootElementHttpMessageConverter in Spring MVC in Spring Framework before 3.2.8… CVSS 2.0MEDIUM 6.8
Sources
- CVE-2026-41849 · CVE Program
- CVE-2026-41849 · NVD
- FIRST EPSS
- GHSA-775g-4xr8-78h8 · GitHub Advisory Database · CC BY 4.0
- CVE-2026-41849 · Red Hat security data · CC BY 4.0
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