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Highest advisory severityMedium 1 vendor · 1 advisory

CVE-2026-59898

CVE-2026-59898: 1 tracked advisory record across Red Hat. Compare source-reported impact, fixes and remediation.

Compare the source-linked records below. Ratings and product/version details belong to each advisory; they are not a single CVE-wide score or proof that every listed product is affected. How VulniPulse collects and checks evidence.

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Vendor advisory comparison

Red Hat

1 advisory
  • Advisory severityMedium5.3

    Medium [CVE-2026-59898] Protocol version confusion in netty-codec-http (WebSocket)

    CVE-2026-59898Source published Source updated

    Netty is an asynchronous, event-driven network application framework. Prior to versions 4.1.136.Final and 4.2.16.Final, ab attacker can force WebSocket upgrade via the lax V07 (or V08) handshaker by sending `Sec-WebSocket-Version: 7` and omitting `Connection: Upgrade` / `Upgrade: websocket` headers, completing a protocol switch that a proxy would not recognize as an Upgrade request and enabling HTTP request smuggling / protocol-confusion attacks. A flaw was found in netty-codec-http. The WebSocket handshaker in this component fails to properly validate protocol version information during the WebSocket upgrade process. A remote attacker can exploit this vulnerability by manipulating the WebSocket handshake, leading to a bypass of security checks or the negotiation of unexpected protocol…

    Affected products in this advisory
    • Red Hat build of Quarkus 3.27.4.SP3
    • Red Hat build of Quarkus 3.33.2.SP3
    • Cryostat 4
    • OpenShift Serverless

    19 more entries in the full advisory.

    Source-reported affected versions
    • < 4.1.136.Final
    • < 4.2.16.Final
    Source-reported fixed versions
    • 4.1.136
    • 4.2.16
    • netty-codec-http
    • RHSA-2026:47189

    1 more entries in the full advisory.

    Mitigation guidance
    • Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.
    Full advisory and evidenceOpen source bulletin

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