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    CVE-2026-93491

    A flaw was found in Netty's HttpServerCodec. A remote, unauthenticated attacker can exploit this vulnerability by pipelining HTTP/1.1 requests on a single connection and withholding reads. This action causes the methodOverflowQueue to grow without limit, leading to unbounded heap memory consumption and a denial of service due to memory exhaustion.

    Published:Sep 10, 2026
    Last Modified:Oct 15, 2026
    EPS:Sep 18, 2026
    EPSS Score:0.00734
    CVSS Score:7.5

    Affected Products

    Vendor
    Io.netty
    Product
    Netty-codec-http
    Vendor
    Redhat
    Product
    Amq Broker
    Vendor
    Redhat
    Product
    Amq Broker 7
    Vendor
    Redhat
    Product
    Amq Clients
    Vendor
    Redhat
    Product
    Apache Camel Quarkus
    Vendor
    Redhat
    Product
    Apicurio Registry
    Vendor
    Redhat
    Product
    Build Keycloak
    Vendor
    Redhat
    Product
    Build Of Apache Camel For Quarkus
    Vendor
    Redhat
    Product
    Build Of Apache Camel For Spring Boot
    Vendor
    Redhat
    Product
    Build Of Apicurio Registry
    Vendor
    Redhat
    Product
    Build Of Debezium 3
    Vendor
    Redhat
    Product
    Build Of Keycloak
    Vendor
    Redhat
    Product
    Build Of Quarkus
    Vendor
    Redhat
    Product
    Camel Quarkus
    Vendor
    Redhat
    Product
    Camel Spring Boot
    Vendor
    Redhat
    Product
    Data Grid 8
    Vendor
    Redhat
    Product
    Debezium
    Vendor
    Redhat
    Product
    Jboss Data Grid
    Vendor
    Redhat
    Product
    Jboss Enterprise Application Platform
    Vendor
    Redhat
    Product
    Jboss Fuse
    Vendor
    Redhat
    Product
    Quarkus
    Vendor
    Redhat
    Product
    Quay 3
    Vendor
    Redhat
    Product
    Red Hat Single Sign On

    Exploits

    No exploit reference

    Related CVEs

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    CVE-2026-93574 (CVSS 6.5) — A flaw was found in Netty's `netty-codec-http` component. A remote attacker could exploit this vulnerability b…
    CVE-2026-93573 (CVSS 6.5) — A flaw was found in Netty's HTTP/1.1 decoder. This vulnerability allows a remote attacker to bypass `Transfer-…
    CVE-2026-93572 (CVSS 7.5) — A flaw was found in Netty's `RedisArrayAggregator` component. A remote attacker can exploit this vulnerability…
    CVE-2026-93569 (CVSS 8.2) — A flaw was found in Netty. A remote unauthenticated attacker can exploit a vulnerability in Netty's HTTP/1 to …
    CVE-2026-93568 (CVSS 7.5) — A flaw was found in Netty. A remote attacker could exploit this vulnerability by sending specially crafted HTT…
    CVE-2026-93563 (CVSS 7.5) — A flaw was found in Netty's `SmtpResponseDecoder` component. A remote attacker, acting as a malicious or man-i…
    CVE-2026-93562 (CVSS 6.5) — A flaw was found in Netty's HTTP/1 decoder. Incomplete validation of malformed Transfer-Encoding headers allow…

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High