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Highest advisory severityCritical 1 vendor · 1 advisory

CVE-2026-53622

CVE-2026-53622: 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 severityCritical9.1

    Critical [CVE-2026-53622] mTLS enforcement bypass due to HTTP/3 TLS configuration flaw

    CVE-2026-53622Source published Source updated

    Traefik is an HTTP reverse proxy and load balancer. Prior to 3.7.3, there is a critical vulnerability in Traefik's HTTP/3 (QUIC) TLS configuration selection that allows unauthenticated clients to bypass router-specific mTLS enforcement. When HTTP/3 is enabled on an entrypoint, the TLS handshake selects the applicable TLS configuration through an exact, case-sensitive lookup on the SNI value, which fails to match wildcard host patterns (e.g., *.example.com) or case variants of the configured hostname. Because the handshake falls back to the default TLS configuration — which may not require client certificates — a client can complete the QUIC handshake without presenting a certificate, while the subsequent HTTP routing layer still dispatches the request to a backend protected by a…

    Affected products in this advisory
    • Red Hat OpenShift Dev Spaces 3.30
    Source-reported affected versions
    • < 3.7.3
    Source-reported fixed versions
    • 3.7.3
    • devspaces/traefik-rhel9:1787756799
    • RHSA-2026:62260
    Mitigation guidance
    • To mitigate this issue, disable HTTP/3 (QUIC) on Traefik entrypoints. This prevents the TLS configuration selection flaw that leads to mTLS bypass. Consult Traefik documentation for specific configuration steps to disable HTTP/3. Restarting the Traefik service will be required for the changes to take effect.
    Full advisory and evidenceOpen source bulletin

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