Spring Framework <=7.0.7,6.2.18,6.1.27,5.3.48 Vulnerable to Multipart Smuggling
CVE-2026-41853 Published on June 9, 2026
Spring Framework Multipart Request Smuggling in Spring MVC and WebFlux
Spring MVC and WebFlux applications are vulnerable to Multipart request smuggling attacks.
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.
Vulnerability Analysis
CVE-2026-41853 can be exploited with network access, and does not require authorization privileges or user interaction. This vulnerability is considered to have a low attack complexity. The potential impact of an exploit of this vulnerability is considered to have no impact on confidentiality, with no impact on integrity, and no impact on availability.
Weakness Type
What is a HTTP Request Smuggling Vulnerability?
When malformed or abnormal HTTP requests are interpreted by one or more entities in the data flow between the user and the web server, such as a proxy or firewall, they can be interpreted inconsistently, allowing the attacker to "smuggle" a request to one device without the other device being aware of it.
CVE-2026-41853 has been classified to as a HTTP Request Smuggling vulnerability or weakness.
Affected Versions
Spring Framework:- Version 7.0.0 and below 7.0.7.1 is affected.
- Version 6.2.0 and below 6.2.18.1 is affected.
- Version 6.1.0 and below 6.1.28 is affected.
- Version 5.3.0 and below 5.3.49 is affected.
Exploit Probability
EPSS (Exploit Prediction Scoring System) scores estimate the probability that a vulnerability will be exploited in the wild within the next 30 days. The percentile shows you how this score compares to all other vulnerabilities.