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      "category" : "summary",
      "text" : "An update for brotli is now available for Red Hat Enterprise Linux 10.\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" : "Brotli is a generic-purpose lossless compression algorithm that compresses data using a combination of a modern variant of the LZ77 algorithm, Huffman coding and 2nd order context modeling, with a compression ratio comparable to the best currently available general-purpose compression methods. It is similar in speed with deflate but offers more dense compression. \n\nSecurity Fix(es):\n\n* brotli: Out-of-Bounds Write in Google Brotli Decoder (CVE-2026-111497)\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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      "url" : "https://security.access.redhat.com/data/csaf/v2/advisories/2026/rhsa-2026_90449.json"
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    "cwe" : {
      "id" : "CWE-787",
      "name" : "Out-of-bounds Write"
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    "discovery_date" : "2026-10-22T13:42:58.596140+00:00",
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      "category" : "description",
      "text" : "A flaw was found in the Google Brotli decoder. An out-of-bounds write in the block-type switch handling in c/dec/decode.c can be triggered by a crafted Brotli-compressed stream. When an application decompresses untrusted Brotli data, this can lead to memory disclosure, denial of service, or potentially arbitrary code execution.",
      "title" : "Vulnerability description"
    }, {
      "category" : "summary",
      "text" : "brotli: Out-of-Bounds Write in Google Brotli Decoder",
      "title" : "Vulnerability summary"
    }, {
      "category" : "other",
      "text" : "This issue is rated Important. Exploitation requires that the target decompress attacker-controlled Brotli data (for example HTTP content negotiated with Content-Encoding: br, or APIs such as Node.js zlib / fetch() that decode Brotli). The vulnerable path is reached with a malformed stream rather than typical well-formed encoder output. Red Hat Enterprise Linux compiler and runtime hardenings - including Address Space Layout Randomization (ASLR), Non-eXecutable (NX) memory, FORTIFY_SOURCE, and SELinux - increase the difficulty of turning this memory corruption into reliable code execution, though they do not eliminate crashes or all impact. Combined with the Attack Requirements noted by the CNA (CVSS v4 AT:P), Red Hat scores Attack Complexity as High and rates the flaw Important rather than Critical.\n\n---\n\nThe Node.js packages in Red Hat Enterprise Linux use either system version of brotli or bundled version. Some Node.js versions are marked \"Not affected\" because they utilize system brotli. For these versions, the Node.js package itself does not require updating. However, customers must still update the system brotli/libbrotli package to address the vulnerability for these Node.js installations.\n\nFollowing is the overview of Node.js versions use system or bundled version.\n\n- Node.js 22 in Red Hat Enterprise Linux 8 and 9, provided via nodejs:22 module, uses system brotli.\n- Node.js 24 in Red Hat Enterprise Linux 8 and 9, provided via nodejs:24 modules, use bundled brotli.\n- Node.js 22 and 24 in Red Hat Enterprise Linux 10, provided via nodejs22 and nodejs24 use system brotli.\n\n---\n\nThe .NET packages in Red Hat Enterprise Linux may either use system version of brotli or bundled version. Following is the overview of .NET versions use system or bundled version.\n\n- .NET 8.0 in Red Hat Enterprise Linux 8, 9, and 10, provided via dotnet8.0 packages, use bundled brotli.\n- .NET 9.0, 10.0, and 11.0 in Red Hat Enterprise Linux 8, 9, and 10, provided via dotnet9.0, dotnet10.0, and dotnet11.0 packages, use system brotli.",
      "title" : "Statement"
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      "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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    } ],
    "scores" : [ {
      "cvss_v3" : {
        "attackComplexity" : "HIGH",
        "attackVector" : "NETWORK",
        "availabilityImpact" : "HIGH",
        "baseScore" : 8.1,
        "baseSeverity" : "HIGH",
        "confidentialityImpact" : "HIGH",
        "integrityImpact" : "HIGH",
        "privilegesRequired" : "NONE",
        "scope" : "UNCHANGED",
        "userInteraction" : "NONE",
        "vectorString" : "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H",
        "version" : "3.1"
      },
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    } ],
    "threats" : [ {
      "category" : "exploit_status",
      "date" : "2026-10-27T00:00:00+00:00",
      "details" : "CISA: https://www.cisa.gov/known-exploited-vulnerabilities-catalog"
    }, {
      "category" : "impact",
      "details" : "Important"
    } ],
    "title" : "brotli: Out-of-Bounds Write in Google Brotli Decoder"
  } ]
}