Spring Framework Denial of Service via Integer Overflow in SpEL Expressions

published 2026-06-09 5 mo ago modified 2026-07-30 3 mo ago also GHSA-775g-4xr8-78h8 , EUVD-2026-35337

cvss: 7.5; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 0.3%; EPSS 0.3% chance of exploitation in 30 days, percentile 18%
public exploits: 0; none known

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.

Patch / fix

fixed in 1

Spring Spring Framework 5.3.49

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2026-41849 updated 2026-07-20 cvss 5.9

spring-framework: Spring Framework: Denial of Service via integer overflow in SpEL

Red Hat OpenShift Developer Tools and Services spring-expression 6.2.14 Red Hat OpenShift Dev Spaces spring-expression 6.2.14
not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation: none
Automatable: no
Technical impact: partial
Assessed: 5 mo ago (2026-06-09)

Exploit prediction

0.26% chance of exploitation in the next 30 days, higher than 18% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
CNA	3.1	7.5	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
GitHub	3.1	7.5	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected packages

ecosystem	package	affected	fixed in
maven	org.springframework:spring-expression	<=5.3.39	no fix listed

Affected products

Spring Spring Framework

Classification

Weakness

CWE-190 Integer Overflow or Wraparound

Technology feeds

Spring rss critical rss

References

spring.io /security/cve-2026-41849
web, vendor-advisory
nvd.nist.gov /vuln/detail/CVE-2026-41849
advisory
github.com /spring-projects/spring-framework
package

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary