{
  "cveId": "CVE-2026-78661",
  "url": "https://patchblox.com/security/cve/CVE-2026-78661",
  "summary": "CVE-2026-78661 is fixed in golang-golang-x-net on 1 platform by DEBIAN-CVE-2026-78661 (version 1:0.62.0-1), released November 3, 2026. It is not reported as exploited. Patch Radar priority: High.",
  "title": "Avoid quadratic complexity when coalescing text nodes in html in golang.org/x/net",
  "description": "When coalescing adjacent text nodes in addText and fosterParent, appending to an existing TextNode\u0027s Data via string concatenation (n.Data \u002B= text) reallocated and copied the accumulated string on every token. Inputs containing many short text runs separated by ignored end tags (such as \u0022a\u003C/x\u003E\u0022) caused O(n^2) allocations and byte copies. Accumulate coalesced text in per-node byte slices during parsing and materialize Data strings once at the end of parse.",
  "published": "2026-10-27T22:18:05Z",
  "severity": "Moderate",
  "cvss": 7.5,
  "cvssVector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N",
  "epss": 0.00409,
  "epssPercentile": 0.35414,
  "priority": "High",
  "priorityTier": 3,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "vendorAdvisory": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-78661",
  "fixes": [
    {
      "platform": "linux",
      "product": "golang-golang-x-net",
      "release": "Debian 14",
      "fixedVersion": "1:0.62.0-1",
      "fix": "DEBIAN-CVE-2026-78661",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-78661",
      "released": "2026-11-03T18:58:21Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-09T07:25:28Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}