ETK-2026-2957Zero's internal tracking ID, independent of the CVE number.

{
  "etk_id": "ETK-2026-2957",
  "cve_id": null,
  "display_id": "ETK-2026-2957",
  "ghsa_id": "GHSA-h5m7-4hv9-cvp3",
  "euvd_id": null,
  "status": "published",
  "anchor_state": "awaiting_cve",
  "title": "Use-after-free in zstd-jni multi-dictionary decompression",
  "summary": "zstd-jni multi-dictionary decompression can retain a native reference to a dictionary after it is closed. An attacker able to influence this dictionary lifecycle may trigger native memory corruption and terminate the JVM. The issue requires multi-dictionary mode and a previously registered dictionary to be closed while still referenced.",
  "mitigation": "Upgrade com.github.luben:zstd-jni to version 1.5.7-25 or later. Until upgraded, do not enable multi-dictionary decompression or close dictionaries that may remain registered with a decompression context.",
  "vendor": "maven",
  "product": "maven:com.github.luben:zstd-jni",
  "affected": [
    {
      "affected_notes": [],
      "affected_ranges": [
        "<= 1.5.7-24"
      ],
      "ecosystem": "maven",
      "fixed_versions": [
        "1.5.7-25"
      ],
      "package_name": "com.github.luben:zstd-jni",
      "purl": "pkg:maven/com.github.luben/zstd-jni"
    }
  ],
  "cwes": [
    416
  ],
  "cvss_score": 8.1,
  "cvss_src": "cna_vendor",
  "cvss_vector": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H",
  "epss_score": null,
  "epss_percentile": null,
  "epss_asof": null,
  "automation": "contextual",
  "check": true,
  "check_confidence_basis": "assessed",
  "exploit": false,
  "pipeline_minutes": 8.140308166666667,
  "t0_at": null,
  "signals": {
    "check": {
      "at": "2026-10-29T10:52:20.147755+00:00",
      "days": -0.14588702673611112,
      "is_lower_bound": true,
      "measured_at": "2026-10-29T14:22:24.829589+00:00",
      "url": null
    },
    "trigger_signal": {
      "at": "2026-10-28T02:42:41+00:00",
      "days": -1.485923459085648,
      "is_lower_bound": true,
      "measured_at": "2026-10-29T14:22:24.829589+00:00",
      "url": "https://github.com/luben/zstd-jni/security/advisories/GHSA-h5m7-4hv9-cvp3"
    }
  }
}