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Highest advisory severityHigh 1 vendor · 1 advisory

CVE-2026-56817

CVE-2026-56817: 1 tracked advisory record across Red Hat. Compare source-reported impact, fixes and remediation.

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-2026-56817] Information disclosure via XML External Entity (XXE) vulnerability

    CVE-2026-56817Source published Source updated

    Netty is a network application framework for development of protocol servers and clients. In versions 4.2.0.Final through 4.2.15.Final and 4.1.0.Final through 4.1.135.Final, any caller that can deliver bytes to a Netty channel pipeline containing `XmlDecoder` can send XML with a `DOCTYPE` declaration to an `AsyncXMLInputFactory` instantiated with no security configuration, leaving DTD and entity handling active depending on Aalto XML async parser behavior and creating conditional XML external entity risk. This issue is fixed in versions 4.1.136.Final and 4.2.16.Final. A remote attacker could exploit this vulnerability by sending specially crafted XML data containing a DOCTYPE declaration to a vulnerable XmlDecoder within the Netty channel pipeline. This can lead to an XML External Entity…

    Affected products in this advisory
    • Red Hat build of Apache Camel 4.18.3 for Spring Boot 3.5.16
    • Red Hat Data Grid 8
    • Red Hat JBoss Enterprise Application Platform 7
    • Red Hat Single Sign-On 7
    Source-reported affected versions
    • 4.2.0
    • 4.2.15
    • 4.1.0
    • 4.1.135
    Source-reported fixed versions
    • 4.1.136
    • 4.2.16
    • netty-codec-xml
    • RHSA-2026:54622
    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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