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Highest advisory severityHigh 1 vendor · 1 advisory

CVE-2026-56853

CVE-2026-56853: 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-2026-56853] Go net/http: Unencrypted HTTP/2 connections vulnerable to Denial of Service

    CVE-2026-56853Source published Source updated

    When a server is configured to support unencrypted HTTP/2, it reads a few bytes from each new connection to see if they contain the HTTP/2 client preface. ReadHeaderTimeout is unexpectedly not being applied when doing this. A flaw was found in the `net/http` component of the Go standard library. This oversight could allow a remote attacker to maintain open connections indefinitely, potentially leading to a Denial of Service (DoS) by exhausting server resources. Important: Unencrypted HTTP/2 servers are susceptible to a denial of service due to improper handling of ReadHeaderTimeout during the client preface reading phase. This can lead to resource exhaustion and service unavailability in affected Red Hat products configured to support unencrypted HTTP/2. Red Hat severity: Important —…

    Affected products in this advisory
    • Red Hat Enterprise Linux 10.0 Extended Update Support
    • Red Hat Enterprise Linux 8
    • Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions
    • Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions

    52 more entries in the full advisory.

    Source-reported affected versions
    Affected-version details not available in this record.
    Source-reported fixed versions
    • golang-0:1.26.7-1.el10_2
    • go-fdo-server-0:1.0.1-2.el10_2.4
    • golang-github-openprinting-ipp-usb-0:0.9.27-7.el10_2.3
    • grafana-0:10.2.6-28.el10_2.5

    46 more entries in the full advisory.

    Mitigation guidance
    No mitigation guidance extracted; consult the source.
    Full advisory and evidenceOpen source bulletin

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