Spring WebFlux multipart temp file retention (disk space depletion)
CVE-2026-22740 Published on April 29, 2026
Spring Framework DoS with Multipart Temp Files in WebFlux
A WebFlux server application that processes multipart requests creates temp files for parts larger than 10 K. Under some circumstances, temp files may remain not deleted after the request is fully processed. This allows an attacker to consume available disk space.
Older, unsupported versions are also affected.
Vulnerability Analysis
CVE-2026-22740 is exploitable with network access, and requires small amount of user privileges. 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 and integrity, and a high impact on availability.
Weakness Type
What is a Resource Exhaustion Vulnerability?
The software does not properly control the allocation and maintenance of a limited resource, thereby enabling an actor to influence the amount of resources consumed, eventually leading to the exhaustion of available resources.
CVE-2026-22740 has been classified to as a Resource Exhaustion vulnerability or weakness.
Products Associated with CVE-2026-22740
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Affected Versions
VMware Spring Framework:- Version 7.0.0 and below 7.0.7 is affected.
- Version 6.2.0 and below 6.2.18 is affected.
- Version 6.1.0 and below 6.1.27 is affected.
- Version 5.3.0 and below 5.3.48 is affected.