Memory leak in Spring Framework - CVE-2026-41840
Published: August 28, 2026
Vulnerability identifier: #VU146166
CSH Severity: Medium
CVSS v4: 8.2 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-41840
CWE-ID: CWE-401
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to cause a denial of service.
The vulnerability exists due to memory leakage in multipart request processing in Spring WebFlux when processing multipart requests. A remote attacker can send malicious multipart requests to cause a denial of service.
The issue affects applications that implement a web endpoint that receives multipart requests.
Affected software
Spring Framework
How to mitigate CVE-2026-41840
Install security update from vendor's website.
Spring Framework - addressed in versions 5.3.49, 6.1.28, 6.2.18.1, 6.2.19, 7.0.7.1, 7.0.8