Bug 2553075 (CVE-2026-102475)

Summary: CVE-2026-102475 io.vertx/vertx-http-proxy: vertx-http-proxy: Denial of Service via unbounded memory allocation in body transformer
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
Status: NEW --- QA Contact:
Severity: high Docs Contact:
Priority: high    
Version: unspecifiedCC: ant, cescoffi, fmongiar, gsmet, janstey, jmartisk, jnethert, manderse, olubyans, ozzy, pjindal, rguimara, sbiarozk, varjain
Target Milestone: ---Keywords: Security
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Hardware: All   
OS: Linux   
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A flaw was found in Eclipse Vert.x HTTP proxy. A remote attacker can cause a Denial of Service (DoS) by triggering unbounded memory allocation on the server. When the proxy is configured with an intercepting body transformer, buffer limits are not properly enforced, allowing requests to continuously allocate memory on the heap. This excessive memory consumption can exhaust system resources and cause the application to crash or become unresponsive.
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Cloudforms Team: --- Target Upstream Version:
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Description OSIDB Bzimport 2026-10-15 07:41:53 UTC 
In Eclipse Vert.x versions [5.0.0,5.0.12] or [5.1.0,5.1.9] or [5.2.0, 5.2.0], the HTTP proxy provides a body transformer interceptor that relies on a max buffered bytes limit to ensure a bounded buffer for each request. This can be used to force a server to indefinitely allocate heap. This vulnerability requires to use an intercepting body transformer.



The impacted component is io.vertx:vertx-http-proxy.