Medium severity · published Jun 9, 2026
CVE-2026-41840
Spring WebFlux applications are vulnerable to Denial of Service (DoS) attacks when processing multipart requests
5.9
CVSS
0.3%
EPSS
No
On KEV
Description
Spring WebFlux applications are vulnerable to Denial of Service (DoS) attacks when processing multipart requests.
Affected versions: Spring Framework 7.0.0 through 7.0.7, 6.2.0 through 6.2.18, 6.1.0 through 6.1.27, 5.3.0 through 5.3.48.
CVSS vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack vector
Network
Complexity
High
Privileges
None
User interaction
None
Confidentiality
None
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.3% · higher than 19% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
SF
Spring Framework · Spring
7.0.0 before 7.0.7.1; 6.2.0 before 6.2.18.1; 6.1.0 before 6.1.28; 5.3.0 before 5.3.49 · source: vendor, NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-41840
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-41840
Vendor Advisory
https://spring.io/security/cve-2026-41840
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