CVE-2026-41849 Spring Framework Denial of Service via Integer Overflow in SpEL Expressions
An attacker can cause a Denial of Service in Spring Framework by submitting a crafted SpEL expression that triggers an integer overflow and excessive resource consumption.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-41849?
CVE-2026-41849 is a high-severity vulnerability in Vmware Spring Framework, published on 9 Jun 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official 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.
Weakness: CWE-190
Which versions are affected by CVE-2026-41849?
2 open source packages ship an affected version, including org.springframework:spring-expression. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
org.springframework:spring-expression Maven | All versions to 5.3.39 | None |
org.springframework:spring-expression Maven | All versions to 5.3.39 | None |
Products include Vmware Spring Framework.
How do I fix CVE-2026-41849?
Upgrade to a fixed version.
Is CVE-2026-41849 being exploited?
There is no known exploitation of CVE-2026-41849 in the wild and no public exploit code.
Other vulnerabilities in Vmware Spring Framework
- CVE-2026-47884 Spring Framework Improper Path Limitation in XsltView
- CVE-2026-47890 Spring Framework Server Sent Event stream corruption while rendering fragments
- CVE-2026-47891 Spring Framework maxInMemorySize Bypassed in Jaxb2Decoder
- CVE-2026-47892 Spring Framework Header Predicate Bypass in WebFlux Functional Endpoints
- CVE-2026-59313 Server Sent Event stream corruption in Spring MVC functional web framework
Sources
Also known as CLEANSTART-2026-KM08371, CLSA-2026-1783558960, CLSA-2026-1783645376, CLSA-2026-1783645393, CLSA-2026-1787846138, DEBIAN-CVE-2026-41849 and 3 more.