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Highest advisory severityHigh 1 vendor · 1 advisory

CVE-2026-75899

CVE-2026-75899: 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-2026-75899] Server-Side Request Forgery via repeated hostname percent-decoding

    CVE-2026-75899Source published Source updated

    fast-uri is a URI parser for Node.js. It decodes percent escapes in a hostname during parsing and then decodes the parsed hostname a second time during authority recomposition, so a single call to normalize or resolve can turn nested percent-encoded input into a different network destination such as a loopback hostname or address. For example, a doubly encoded host that spells out a loopback name decodes to that live host in one operation, which contradicts RFC 3986 section 2.4 that an implementation must not decode the same string more than once. An application that normalizes or resolves an untrusted HTTP-family URI before outbound routing, redirect validation, or a host-policy check can receive a destination different from the one the original encoded host represented, giving a…

    Affected products in this advisory
    • Red Hat Enterprise Linux 10
    • Red Hat Satellite 6.19 for RHEL 9
    • Cluster Observability Operator 1.5.3
    • multicluster engine for Kubernetes 2.11

    30 more entries in the full advisory.

    Source-reported affected versions
    • 2.4.1
    • 3.1.2
    • 4.0.0
    Source-reported fixed versions
    • 2.4.5
    • 3.1.6
    • 4.1.3
    • cockpit-image-builder-0:94.4-1.el10_2

    46 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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