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Highest advisory severityHigh 1 vendor · 1 advisory

CVE-2026-48743

CVE-2026-48743: 1 tracked advisory record across Red Hat. Compare vendor sources and published fix guidance.

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 severityHigh7.5

    High [CVE-2026-48743] Request desynchronization allows security policy bypass via HTTP/3 to HTTP/1 translation

    CVE-2026-48743Source published Source updated

    Envoy is an open source edge and service proxy designed for cloud-native applications. Prior to 1.35.11, 1.36.7, 1.37.3, and 1.38.1, Envoy can translate a downstream HTTP/3 request that is complete at the transport layer (HEADERS with FIN / headers-only close) but still carries a nonzero Content-Length into a complete upstream HTTP/1 request with unresolved body debt. In an HTTP/1 upstream deployment where the origin replies before reading the declared body and keeps the connection reusable, the beginning of the next Envoy-generated upstream request can be consumed as the first request's body. The remaining bytes are then parsed by the origin as a new HTTP/1 request. This was reproduced as a route-bypass/desync: direct /pwn was denied by Envoy, but the second downstream H3 stream…

    Affected products in this advisory
    • Red Hat OpenShift Service Mesh 3.2
    • Red Hat OpenShift Service Mesh 3.3
    • OpenShift Service Mesh 2
    Source-reported affected versions
    • < 1.35.11
    • < 1.36.7
    • < 1.37.3
    • < 1.38.1
    Source-reported fixed versions
    • 1.35.11
    • 1.36.7
    • 1.37.3
    • 1.38.1

    4 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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