CVE-2026-118487: Vert.x FP-DS via unlimited buffer (4-4.5.35,5-5.2.2)
CVE-2026-118487 Published on November 3, 2026
Heap exhaustion via unbounded line accumulation in Vert.x STOMP FrameParser
In Eclipse Vert.x versions [4.0.0, 4.5.35] or [5.0.0, 5.2.2], the `FrameParser` in vertx-stomp creates a `RecordParser` without setting `maxRecordSize`, so any peer that streams bytes continuously without a newline character causes the parser to accumulate data indefinitely. Both the STOMP server and the STOMP client are affected: a malicious server can exploit this against a connecting client, and a malicious client can exploit this against a server before or after authentication. Sustained byte streaming exhausts JVM heap memory, crashing the affected process and causing a complete denial of service.
Vulnerability Analysis
CVE-2026-118487 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. An automatable proof of concept (POC) exploit exists. 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
Allocation of Resources Without Limits or Throttling
The software allocates a reusable resource or group of resources on behalf of an actor without imposing any restrictions on the size or number of resources that can be allocated, in violation of the intended security policy for that actor.
Products Associated with CVE-2026-118487
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Affected Versions
Eclipse Foundation Eclipse Vert.x:- Version 4.0.0, <= 4.5.35 is affected.
- Version 5.0.0, <= 5.2.2 is affected.