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      "text" : "An update for osbuild-composer is now available for Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support and Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On.\n\nRed Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.",
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      "text" : "An image building service based on osbuild It is inspired by lorax-composer and exposes the same API. As such, it is a drop-in replacement.\n\nSecurity Fix(es):\n\n* crypto/tls: crypto/tls: Incorrect certificate validation during TLS session resumption (CVE-2025-68121)\n\n* crypto/x509: golang: Go crypto/x509: Denial of Service via inefficient certificate chain validation (CVE-2026-32281)\n\n* crypto/x509: golang: Go crypto/x509: Certificate validation bypass due to incorrect DNS constraint application (CVE-2026-33810)\n\n* crypto/x509: crypto/tls: golang: Go: Denial of Service vulnerability in certificate chain building (CVE-2026-32280)\n\n* golang.org/x/net/idna: golang: net/http: golang.org/x/net/idna: Privilege escalation via incorrect Punycode label processing (CVE-2026-39821)\n\n* mime: golang: Golang MIME: Denial of Service via maliciously-crafted MIME header (CVE-2026-42504)\n\n* github.com/labstack/echo: Echo: Unauthorized Information Disclosure via URL Path Decoding Discrepancy (CVE-2026-55677)\n\n* encoding/asn1: golang: Go encoding/asn1: Denial of Service via excessive recursion in Unmarshal (CVE-2026-33818)\n\n* net/url: golang: golang net/url: Denial of Service from quadratic complexity in path resolution (CVE-2026-56860)\n\n* net/http: golang: Go net/http: Unencrypted HTTP/2 connections vulnerable to Denial of Service (CVE-2026-56853)\n\n* html/template: golang: Go html/template: Cross-Site Scripting via pathological input (CVE-2026-56858)\n\n* crypto/tls: golang: Golang crypto/tls: Denial of Service via indefinite KeyUpdate messages (CVE-2026-56862)\n\n* encoding/xml: golang: Go: Denial of Service via XML decoding recursion depth issue (CVE-2026-56859)\n\n* net/http: golang: golang: Denial of Service via crafted HTTP Range headers (CVE-2026-78667)\n\n* crypto/tls: golang: crypto/tls: Denial of Service via multiple ECH outer extension references (CVE-2026-97031)\n\n* net/textproto: mime/multipart: golang: golang: Denial of Service via memory limit bypass in multipart form parsing (CVE-2026-94440)\n\n* net/http: net/http/internal/http2: golang.org/x/net/http2: net/http: Denial of Service via excessive HTTP/2 SETTINGS frames (CVE-2026-78669)\n\nFor more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.",
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      "text" : "This content is licensed under the Creative Commons Attribution 4.0 International License (https://creativecommons.org/licenses/by/4.0/). If you distribute this content, or a modified version of it, you must provide attribution to Red Hat Inc. and provide a link to the original.",
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      "category" : "general",
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    "title" : "crypto/x509: golang: Go crypto/x509: Certificate validation bypass due to incorrect DNS constraint application"
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    "title" : "encoding/asn1: golang: Go encoding/asn1: Denial of Service via excessive recursion in Unmarshal"
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    "cve" : "CVE-2026-39821",
    "cwe" : {
      "id" : "CWE-1289",
      "name" : "Improper Validation of Unsafe Equivalence in Input"
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      "text" : "A flaw was found in golang.org/x/net/idna. ToASCII and ToUnicode incorrectly accept Punycode-encoded labels that decode to an ASCII-only hostname (for example, xn--example-.com returns example.com instead of an error). Applications that validate the ASCII form then convert to Unicode may grant access to a restricted hostname the ASCII check would have rejected.",
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    "title" : "golang.org/x/net/idna: golang: net/http: golang.org/x/net/idna: Privilege escalation via incorrect Punycode label processing"
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      "title" : "Vulnerability description"
    }, {
      "category" : "summary",
      "text" : "mime: golang: Golang MIME: Denial of Service via maliciously-crafted MIME header",
      "title" : "Vulnerability summary"
    }, {
      "category" : "other",
      "text" : "This is rated as an Important severity flaw. A remote attacker could trigger a Denial of Service by sending a crafted MIME header with numerous invalid encoded-words to an application utilizing the affected Golang MIME package. This could lead to excessive CPU consumption on the system processing the malformed header, impacting service availability.",
      "title" : "Statement"
    }, {
      "category" : "general",
      "text" : "The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.",
      "title" : "CVSS score applicability"
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    "title" : "net/url: golang: golang net/url: Denial of Service from quadratic complexity in path resolution"
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      "title" : "Vulnerability description"
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      "category" : "summary",
      "text" : "net/http: golang: golang: Denial of Service via crafted HTTP Range headers",
      "title" : "Vulnerability summary"
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      "category" : "other",
      "text" : "This vulnerability is rated with an Important severity for Red Hat products because an unauthenticated remote attacker can exhaust server compute resources over the network, leading to a complete service outage. Across Red Hat enterprise environments, Go is widely deployed in container runtimes, monitoring daemons, and OpenShift infrastructure components. However, exploitation is restricted to applications that actively listen on the network and serve content using standard library HTTP handlers that process multi-range requests. CLI utilities and server components that do not handle byte-range requests from untrusted clients remain unaffected.",
      "title" : "Statement"
    }, {
      "category" : "general",
      "text" : "The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.",
      "title" : "CVSS score applicability"
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    "title" : "net/http: golang: golang: Denial of Service via crafted HTTP Range headers"
  }, {
    "cve" : "CVE-2026-78669",
    "cwe" : {
      "id" : "CWE-770",
      "name" : "Allocation of Resources Without Limits or Throttling"
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    "ids" : [ {
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      "text" : "2548344"
    } ],
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      "category" : "description",
      "text" : "A flaw was found in the Go net/http package. This flaw allows a remote attacker to cause a Denial of Service (DoS) by triggering excessive CPU consumption on an affected client or server. By opening a large number of HTTP/2 streams and repeatedly sending small configuration (SETTINGS) frames that modify window sizes, an attacker forces the system into intensive state processing. This resource exhaustion degrades performance and can render the service unresponsive.",
      "title" : "Vulnerability description"
    }, {
      "category" : "summary",
      "text" : "net/http: net/http/internal/http2: golang.org/x/net/http2: net/http: Denial of Service via excessive HTTP/2 SETTINGS frames",
      "title" : "Vulnerability summary"
    }, {
      "category" : "other",
      "text" : "A flaw was found in the Go net/http package and the golang.org/x/net/http2 module. A malicious HTTP/2 peer can cause excessive CPU consumption by opening a large number of HTTP/2 streams and then sending many small SETTINGS frames containing SETTINGS_INITIAL_WINDOW_SIZE values. Each SETTINGS frame forces the server or client to iterate over all open streams to adjust their flow-control windows, resulting in quadratic CPU usage and denial of service.\n\nThis vulnerability affects all Go programs that serve or consume HTTP/2 traffic using net/http or golang.org/x/net/http2.",
      "title" : "Statement"
    }, {
      "category" : "general",
      "text" : "The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.",
      "title" : "CVSS score applicability"
    } ],
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      "url" : "https://go.dev/cl/847186"
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      "url" : "https://go.dev/issue/81742"
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      "category" : "external",
      "summary" : "https://pkg.go.dev/vuln/GO-2026-6611",
      "url" : "https://pkg.go.dev/vuln/GO-2026-6611"
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    "title" : "net/http: net/http/internal/http2: golang.org/x/net/http2: net/http: Denial of Service via excessive HTTP/2 SETTINGS frames"
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    "cve" : "CVE-2026-94440",
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      "name" : "Allocation of Resources Without Limits or Throttling"
    },
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    "ids" : [ {
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      "text" : "2548341"
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      "text" : "A flaw was found in the mime/multipart and net/textproto packages in Go. A remote attacker could exploit this vulnerability by submitting a crafted multipart form request that bypasses configured memory limits when the remaining boundary limit is small. This issue allows the application to read an arbitrarily long line into memory, leading to excessive resource consumption and a Denial of Service (DoS).",
      "title" : "Vulnerability description"
    }, {
      "category" : "summary",
      "text" : "net/textproto: mime/multipart: golang: golang: Denial of Service via memory limit bypass in multipart form parsing",
      "title" : "Vulnerability summary"
    }, {
      "category" : "other",
      "text" : "This vulnerability is rated as having a Moderate severity for Red Hat products because, while an unauthenticated remote attacker can trigger excessive memory consumption leading to a denial of service, exploitation cannot lead to code execution or information disclosure. The issue specifically threatens Go-based services and daemons that accept and process incoming multipart HTTP form payloads. Applications built with Go that do not expose web interfaces or parse multipart request streams are unaffected by this flaw.",
      "title" : "Statement"
    }, {
      "category" : "general",
      "text" : "The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.",
      "title" : "CVSS score applicability"
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    "cve" : "CVE-2026-97031",
    "cwe" : {
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      "name" : "Allocation of Resources Without Limits or Throttling"
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      "category" : "description",
      "text" : "A flaw was found in crypto/tls. A remote attacker can trigger this vulnerability by sending a specially crafted packet containing multiple Encrypted Client Hello (ECH) outer extension references to a server. Processing these unauthorized references leads to excessive memory consumption, causing a Denial of Service (DoS) through server crashes or unresponsiveness.",
      "title" : "Vulnerability description"
    }, {
      "category" : "summary",
      "text" : "crypto/tls: golang: crypto/tls: Denial of Service via multiple ECH outer extension references",
      "title" : "Vulnerability summary"
    }, {
      "category" : "other",
      "text" : "This vulnerability is rated as an Important severity flaw because an unauthenticated remote attacker can trigger memory exhaustion and crash server processes without requiring privileges or user interaction. Go applications that terminate TLS connections and accept Encrypted Client Hello configurations are vulnerable to resource amplification during the initial handshake. While the flaw does not facilitate arbitrary code execution or compromise data confidentiality, the resulting denial of service can disrupt critical network services.",
      "title" : "Statement"
    }, {
      "category" : "general",
      "text" : "The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.",
      "title" : "CVSS score applicability"
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    "references" : [ {
      "category" : "self",
      "summary" : "Canonical URL",
      "url" : "https://access.redhat.com/security/cve/CVE-2026-97031"
    }, {
      "category" : "external",
      "summary" : "RHBZ#2548336",
      "url" : "https://bugzilla.redhat.com/show_bug.cgi?id=2548336"
    }, {
      "category" : "external",
      "summary" : "https://www.cve.org/CVERecord?id=CVE-2026-97031",
      "url" : "https://www.cve.org/CVERecord?id=CVE-2026-97031"
    }, {
      "category" : "external",
      "summary" : "https://nvd.nist.gov/vuln/detail/CVE-2026-97031",
      "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-97031"
    }, {
      "category" : "external",
      "summary" : "https://go.dev/cl/847312",
      "url" : "https://go.dev/cl/847312"
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      "category" : "external",
      "summary" : "https://go.dev/issue/81855",
      "url" : "https://go.dev/issue/81855"
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      "category" : "external",
      "summary" : "https://groups.google.com/g/golang-announce/c/U2fTuyDJznI",
      "url" : "https://groups.google.com/g/golang-announce/c/U2fTuyDJznI"
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      "summary" : "https://pkg.go.dev/vuln/GO-2026-6607",
      "url" : "https://pkg.go.dev/vuln/GO-2026-6607"
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}