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{
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      {
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          {
            "cvssV3_1": {
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              "attackVector": "NETWORK",
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              "baseSeverity": "MEDIUM",
              "confidentialityImpact": "NONE",
              "integrityImpact": "LOW",
              "privilegesRequired": "NONE",
              "scope": "UNCHANGED",
              "userInteraction": "NONE",
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              "version": "3.1"
            }
          },
          {
            "other": {
              "content": {
                "id": "CVE-2026-27145",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-06-04T12:34:03.859208Z",
                "version": "2.0.3"
              },
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            }
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          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
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        ],
        "datePublic": "2026-06-02T22:01:36.954Z",
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            "lang": "en",
            "value": "A flaw was found in the `crypto/x509` package of `golang`. This vulnerability allows a remote attacker to cause a Denial of Service (DoS) by presenting a specially crafted X.509 certificate with a large number of DNS Subject Alternative Name (SAN) entries. The certificate verification process, specifically the `VerifyHostname` function, incurs excessive computational overhead due to repeated string operations when processing these entries. This can lead to a significant performance degradation or unresponsiveness of systems validating such certificates."
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        "timeline": [
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            "time": "2026-06-02T23:01:08.992Z",
            "value": "Reported to Red Hat."
          },
          {
            "lang": "en",
            "time": "2026-06-02T22:01:36.954Z",
            "value": "Made public."
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        "title": "crypto/x509: golang: golang crypto/x509: Denial of Service via excessive processing of DNS SAN entries",
        "workarounds": [
          {
            "lang": "en",
            "value": "A flaw was found in the Go standard library crypto/x509 package. When verifying a TLS certificate hostname, VerifyHostname processed each DNS Subject Alternative Name (SAN) entry in a loop and repeatedly split the candidate hostname on \".\" characters. For certificates with a very large DNS SAN list, CPU use could grow quadratically with the number of SAN entries and hostname labels. Because hostname verification runs before the certificate chain is built, this overhead can occur even when the certificate is not trusted.\n\nRed Hat rates this issue as Important. It affects Red Hat products that include the Go standard library crypto/x509 code from an affected Go toolchain version (before Go 1.25.11, or from Go 1.26.0 through Go 1.26.3). Applications and container images built with a fixed Go release (1.25.11 or later, or 1.26.4 or later) are not affected. Community distributions such as Fedora are also affected.\n\nUpstream fix: Go 1.25.11 and Go 1.26.4 (GO-2026-5037)."
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    "cna": {
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        {
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          "defaultStatus": "unaffected",
          "packageName": "crypto/x509",
          "product": "crypto/x509",
          "programRoutines": [
            {
              "name": "HostnameError.Error"
            },
            {
              "name": "matchHostnames"
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            {
              "name": "Certificate.Verify"
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            {
              "name": "Certificate.VerifyHostname"
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          ],
          "vendor": "Go standard library",
          "versions": [
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              "status": "affected",
              "version": "0",
              "versionType": "semver"
            },
            {
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              "version": "1.26.0-0",
              "versionType": "semver"
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      ],
      "credits": [
        {
          "lang": "en",
          "value": "Jakub Ciolek - https://ciolek.dev/"
        }
      ],
      "descriptions": [
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        }
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      "problemTypes": [
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          "descriptions": [
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              "description": "CWE-407: Inefficient Algorithmic Complexity",
              "lang": "en"
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          ]
        }
      ],
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        "orgId": "1bb62c36-49e3-4200-9d77-64a1400537cc",
        "shortName": "Go"
      },
      "references": [
        {
          "url": "https://go.dev/cl/783621"
        },
        {
          "url": "https://go.dev/issue/79694"
        },
        {
          "url": "https://groups.google.com/g/golang-announce/c/tKs3rmcBcKw"
        },
        {
          "url": "https://pkg.go.dev/vuln/GO-2026-5037"
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      ],
      "title": "Inefficient candidate hostname parsing in crypto/x509"
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  },
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    "assignerOrgId": "1bb62c36-49e3-4200-9d77-64a1400537cc",
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    "dateReserved": "2026-02-17T19:57:28.435Z",
    "dateUpdated": "2026-07-09T12:09:44.786Z",
    "state": "PUBLISHED"
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          "url": "https://pkg.go.dev/vuln/GO-2026-4946"
        }
      ],
      "title": "Inefficient policy validation in crypto/x509"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "1bb62c36-49e3-4200-9d77-64a1400537cc",
    "assignerShortName": "Go",
    "cveId": "CVE-2026-32281",
    "datePublished": "2026-04-08T01:06:58.354Z",
    "dateReserved": "2026-03-11T16:38:46.556Z",
    "dateUpdated": "2026-04-13T18:19:44.779Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

{
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        "metrics": [
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            "cvssV3_1": {
              "attackComplexity": "LOW",
              "attackVector": "NETWORK",
              "availabilityImpact": "HIGH",
              "baseScore": 7.5,
              "baseSeverity": "HIGH",
              "confidentialityImpact": "NONE",
              "integrityImpact": "NONE",
              "privilegesRequired": "NONE",
              "scope": "UNCHANGED",
              "userInteraction": "NONE",
              "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
              "version": "3.1"
            }
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          {
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              "content": {
                "id": "CVE-2026-32280",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "yes"
                  },
                  {
                    "Technical Impact": "partial"
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                "role": "CISA Coordinator",
                "timestamp": "2026-04-08T17:46:14.569488Z",
                "version": "2.0.3"
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              "type": "ssvc"
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            "descriptions": [
              {
                "cweId": "CWE-770",
                "description": "CWE-770 Allocation of Resources Without Limits or Throttling",
                "lang": "en",
                "type": "CWE"
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          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
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