CVE-2026-118487

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    CVE-2026-118487

    Published: 3 Nov 2026Last Modified: 5 Nov 2026

    Summary: Heap exhaustion via unbounded line accumulation in Vert.x STOMP FrameParser

    Details: 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.

    References: https://gitlab.eclipse.org/security/cve-assignment/-/work_items/521, https://gitlab.eclipse.org/security/vulnerability-reports/-/work_items/864, https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/118xxx/CVE-2026-118487.json, https://github.com/vert-x3/vertx-stomp/security/advisories/GHSA-cchp-hff9-j7q7, https://nvd.nist.gov/vuln/detail/CVE-2026-118487

    Affected packages

    Package

    Name:

    Purl:

    Affected ranges

    Type: GIT

    Events:

    Introduced- 6bceb9c26ab574e5d10b2da58dd45ecd7297d794
    Fixed -None

    Affected versions

    5.2.2
    5.2.1
    5.2.0

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High
    CVE-2026-118487 | CVE-DB