{
  "fix": "RHSA-2026:49702",
  "url": "https://patchblox.com/security/fix/linux/rhsa-2026-49702",
  "summary": "RHSA-2026:49702, released May 27, 2026, fixes 16 CVEs in golang (version 1.26.5-1.el10_0). None of them is reported as exploited. Patch Radar priority: Urgent.",
  "platform": "linux",
  "type": "advisory",
  "title": "golang security update",
  "released": "2026-05-27T17:40:12Z",
  "priority": "Urgent",
  "priorityTier": 2,
  "priorityReason": "Closes CVE-2026-39821, rated Critical",
  "supported": true,
  "cveCount": 16,
  "exploitedCveCount": 0,
  "kevCveCount": 0,
  "ransomwareCveCount": 0,
  "maxEpss": 0.01834,
  "maxCvss": 10,
  "vendorAdvisory": "https://access.redhat.com/errata/RHSA-2026:49702",
  "appliesTo": [
    {
      "product": "golang",
      "productUrl": "https://patchblox.com/security/product/linux/golang",
      "release": "RHEL 10",
      "fixedVersion": "1.26.5-1.el10_0",
      "supported": true
    }
  ],
  "cves": [
    {
      "cveId": "CVE-2026-39821",
      "url": "https://patchblox.com/security/cve/CVE-2026-39821",
      "title": "Invoking failure to reject ASCII-only Punycode-encoded labels in golang.org/x/net/idna",
      "priority": "Urgent",
      "severity": "Critical",
      "cvss": 10,
      "epss": 0.01834,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2026-33811",
      "url": "https://patchblox.com/security/cve/CVE-2026-33811",
      "title": "Crash when handling long CNAME response in net",
      "priority": "High",
      "severity": "Important",
      "cvss": 8.8,
      "epss": 0.00875,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2026-33814",
      "url": "https://patchblox.com/security/cve/CVE-2026-33814",
      "title": "Infinite loop in HTTP/2 transport when given bad SETTINGS_MAX_FRAME_SIZE in net/http/internal/http2 in golang.org/x/net",
      "priority": "High",
      "severity": "Important",
      "cvss": 7.5,
      "epss": 0.0084,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2026-42499",
      "url": "https://patchblox.com/security/cve/CVE-2026-42499",
      "title": "Quadratic string concatenation in consumePhrase in net/mail",
      "priority": "High",
      "severity": "Important",
      "cvss": 8.8,
      "epss": 0.00798,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2026-39820",
      "url": "https://patchblox.com/security/cve/CVE-2026-39820",
      "title": "Quadratic string concatentation in consumeComment in net/mail",
      "priority": "High",
      "severity": "Important",
      "cvss": 8.8,
      "epss": 0.00784,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2026-27137",
      "url": "https://patchblox.com/security/cve/CVE-2026-27137",
      "title": "Incorrect enforcement of email constraints in crypto/x509",
      "priority": "High",
      "severity": "Moderate",
      "cvss": 9.1,
      "epss": 0.00661,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2026-27145",
      "url": "https://patchblox.com/security/cve/CVE-2026-27145",
      "title": "Inefficient candidate hostname parsing in crypto/x509",
      "priority": "High",
      "severity": "Moderate",
      "cvss": 8.2,
      "epss": 0.00591,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2026-39825",
      "url": "https://patchblox.com/security/cve/CVE-2026-39825",
      "title": "ReverseProxy forwards queries with more than urlmaxqueryparams parameters in net/http/httputil",
      "priority": "High",
      "severity": "Moderate",
      "cvss": 7.5,
      "epss": 0.0039,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2026-39826",
      "url": "https://patchblox.com/security/cve/CVE-2026-39826",
      "title": "Escaper bypass leads to XSS in html/template",
      "priority": "High",
      "severity": "Moderate",
      "cvss": 7.5,
      "epss": 0.00371,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2026-33810",
      "url": "https://patchblox.com/security/cve/CVE-2026-33810",
      "title": "Case-sensitive excludedSubtrees name constraints cause Auth Bypass in crypto/x509",
      "priority": "High",
      "severity": "Moderate",
      "cvss": 9.1,
      "epss": 0.00346,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2026-39823",
      "url": "https://patchblox.com/security/cve/CVE-2026-39823",
      "title": "Bypass of meta content URL escaping causes XSS in html/template",
      "priority": "High",
      "severity": "Moderate",
      "cvss": 7.5,
      "epss": 0.00314,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2026-39822",
      "url": "https://patchblox.com/security/cve/CVE-2026-39822",
      "title": "Root escape via symlink plus trailing slash in os",
      "priority": "High",
      "severity": "Important",
      "cvss": 8.2,
      "epss": 0.00232,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2026-42501",
      "url": "https://patchblox.com/security/cve/CVE-2026-42501",
      "title": "Malicious module proxy can bypass checksum database in cmd/go",
      "priority": "High",
      "severity": "Important",
      "cvss": 7.5,
      "epss": 0.00231,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2026-39819",
      "url": "https://patchblox.com/security/cve/CVE-2026-39819",
      "title": "Invoking \u0022go bug\u0022 follows symlinks in predictable temporary filenames in cmd/go",
      "priority": "High",
      "severity": "Moderate",
      "cvss": 7.5,
      "epss": 0.00179,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2026-39817",
      "url": "https://patchblox.com/security/cve/CVE-2026-39817",
      "title": "Invoking \u0022go tool pack\u0022 does not sanitize output paths in cmd/go",
      "priority": "High",
      "severity": "Moderate",
      "cvss": 7.5,
      "epss": 0.0017,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2026-42507",
      "url": "https://patchblox.com/security/cve/CVE-2026-42507",
      "title": "Arbitrary inputs are included in errors without any escaping in net/textproto",
      "priority": "Routine",
      "severity": "Moderate",
      "cvss": 5.3,
      "epss": 0.0037,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    }
  ],
  "dataAsOf": "2026-11-07T12:40:37Z"
}