CVE-2026-119078

{
  "etk_id": "ETK-2026-4010",
  "cve_id": "CVE-2026-119078",
  "display_id": "CVE-2026-119078",
  "ghsa_id": "GHSA-rv28-228v-c565",
  "euvd_id": "EUVD-2026-120400",
  "status": "published",
  "anchor_state": "anchored",
  "title": "Repeated-finalization key derivation flaw in Commons Codec Blake3",
  "summary": "Commons Codec versions 1.16.0 through 1.22.x may cause derived keys to repeat when application code finalizes the same Blake3 instance more than once. This can defeat intended key separation; exposure requires an application to rely on consecutive finalization calls for distinct derived values. The evidence does not identify a direct attacker action beyond the resulting loss of key separation.",
  "mitigation": "Upgrade to Commons Codec 1.23.0 for corrected guidance, then audit Blake3 key-derivation code. Request all required output in one finalization operation and divide that output into separate keys rather than finalizing the same instance repeatedly.",
  "vendor": "Apache Software Foundation",
  "product": "Apache Commons Codec",
  "affected": [
    {
      "affected_notes": [],
      "affected_ranges": [
        ">= 1.16.0, < 1.23.0"
      ],
      "ecosystem": null,
      "fixed_versions": [
        "1.23.0"
      ],
      "package_name": "commons-codec:commons-codec",
      "purl": null
    }
  ],
  "cwes": [
    684,
    1068
  ],
  "cvss_score": null,
  "cvss_src": null,
  "cvss_vector": null,
  "epss_score": null,
  "epss_percentile": null,
  "epss_asof": null,
  "automation": "contextual",
  "check": false,
  "check_confidence_basis": null,
  "exploit": false,
  "pipeline_minutes": 12.183282716666668,
  "t0_at": "2026-11-09T20:11:12.230000+00:00",
  "signals": {
    "trigger_signal": {
      "at": "2026-11-09T20:11:12.230000+00:00",
      "days": 0,
      "is_lower_bound": false,
      "measured_at": "2026-11-09T20:11:12.230000+00:00",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-119078"
    }
  }
}