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Highest advisory severityMedium 1 vendor · 1 advisory

CVE-2026-59903

CVE-2026-59903: 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 severityMedium6.5

    Medium [CVE-2026-59903] Information disclosure via CORS Vary header overwrite

    CVE-2026-59903Source published Source updated

    Netty is an asynchronous, event-driven network application framework. Prior to 4.1.137.Final and 4.2.17.Final, io.netty.handler.codec.http.cors. CorsHandler setVaryHeader replaces application Vary headers such as Authorization or Cookie with Origin, allowing a caching proxy or CDN to reuse authenticated responses across users and disclose sensitive information. This Moderate impact information disclosure flaw in Netty arises from the `CorsHandler` incorrectly overwriting application `Vary` headers with `Origin`. This could allow caching proxies or CDNs to reuse authenticated responses across different users, potentially exposing sensitive data. Exploitation requires the presence of a caching proxy or CDN in front of the affected Netty application. Red Hat severity: Moderate — CVSS 6.5…

    Affected products in this advisory
    • Red Hat Ceph Storage 6
    • Red Hat Ceph Storage 7
    • Red Hat Ceph Storage 8
    • Red Hat Ceph Storage 9

    5 more entries in the full advisory.

    Source-reported affected versions
    • < 4.1.137.Final
    • < 4.2.17.Final
    Source-reported fixed versions
    • 4.1.137
    • 4.2.17
    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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