Bug 2463786 (CVE-2026-22740)

Summary: CVE-2026-22740 spring-webflux: Spring WebFlux: Denial of Service via temporary file accumulation
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
Status: NEW --- QA Contact:
Severity: medium Docs Contact:
Priority: medium    
Version: unspecifiedCC: abrianik, asoldano, bbaranow, bmaxwell, bstansbe, dlofthou, ggrzybek, gmalinko, istudens, ivassile, iweiss, janstey, jraez, mosmerov, msvehla, nwallace, parichar, pberan, pdelbell, pesilva, pjindal, pmackay, rstancel, rstepani, smaestri, tasato, thjenkin, vdosoudi
Target Milestone: ---Keywords: Security
Target Release: ---   
Hardware: All   
OS: Linux   
Whiteboard:
Fixed In Version: Doc Type: ---
Doc Text:
A flaw was found in Spring WebFlux, a component of the Spring Framework. A remote attacker can exploit this vulnerability by sending specially crafted multipart requests to a WebFlux server application. When processing these requests, the server creates temporary files that, under certain conditions, are not properly deleted. This can lead to an accumulation of temporary files, consuming available disk space and potentially causing a Denial of Service (DoS) for the affected system.
Story Points: ---
Clone Of: Environment:
Last Closed: Type: ---
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Embargoed:

Description OSIDB Bzimport 2026-04-29 12:01:22 UTC
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.