CVE-2026-116591

{
  "etk_id": "ETK-2026-2698",
  "cve_id": "CVE-2026-116591",
  "display_id": "CVE-2026-116591",
  "ghsa_id": "GHSA-fpmh-frq8-7rj8",
  "euvd_id": "EUVD-2026-110497",
  "status": "published",
  "anchor_state": "anchored",
  "title": "Denial of service in klauspost/compress zstd decoder",
  "summary": "Versions before v1.20.2 of klauspost/compress's Go zstd package can panic while decoding malformed Zstandard frames. An attacker who can supply compressed input to DecodeAll or a streaming decoder may terminate the hosting process.",
  "mitigation": "Upgrade klauspost/compress/zstd to v1.20.2 or later. Until upgraded, avoid decoding untrusted Zstandard data.",
  "vendor": "klauspost",
  "product": "compress",
  "affected": [
    {
      "affected_notes": [],
      "affected_ranges": [
        "<= v1.20.1"
      ],
      "ecosystem": "go",
      "fixed_versions": [
        "v1.20.2"
      ],
      "package_name": "klauspost/compress/zstd",
      "purl": "pkg:golang/klauspost/compress/zstd"
    }
  ],
  "cwes": [
    190
  ],
  "cvss_score": 8.7,
  "cvss_src": "cna_vendor",
  "cvss_vector": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N",
  "epss_score": null,
  "epss_percentile": null,
  "epss_asof": null,
  "automation": "contextual",
  "check": false,
  "check_confidence_basis": null,
  "exploit": false,
  "pipeline_minutes": 15.965659566666666,
  "t0_at": "2026-10-26T21:54:33.109000+00:00",
  "signals": {
    "public_poc": {
      "at": "2026-10-12T10:23:05+00:00",
      "days": -14.480186446759259,
      "is_lower_bound": false,
      "measured_at": "2026-10-26T21:54:33.109000+00:00",
      "url": "https://github.com/klauspost/compress/security/advisories/GHSA-fpmh-frq8-7rj8"
    },
    "trigger_signal": {
      "at": "2026-10-12T10:23:05+00:00",
      "days": -14.480186446759259,
      "is_lower_bound": false,
      "measured_at": "2026-10-26T21:54:33.109000+00:00",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-116591"
    }
  }
}