Malicious code in tinkoff-cache-path (npm)

{
  "id": "61a5faf9cfa6af637dccafe99da0599946777898b4ef8d2afb3f2a6c9e544004",
  "url": "https://osv.dev/vulnerability/MAL-2026-12076",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "Malicious code in tinkoff-cache-path (npm)",
    "summary": "--- _-= Per source details. Do not edit below this line.=-_ ## Source: amazon-inspector (9db3a162bd8fe3b6112b6d058e42245617122a41941d0b3a818254aba25ce59b) The package advertises itself as an in-memory cache utility, but index.js unconditionally requires _compat.js on load, which acts as a dropper. _compat.js selects a platform-specific endpoint from an obfuscated list of hosts assembled at runtime via Array.join (oob-worker.cf*.workers.dev and *.dl.well1.site), downloads an opaque native binary over HTTPS, and falls back to a DNS-TXT covert channel that queries a count record at c. and reassembles numbered base64 TXT chunks into an executable buffer. The payload is written under /var/tmp or %TEMP% with a disguised name (.cache_ on Unix, dotnet_diag_.exe on Windows), chmod +x, and spawned detached via cp.spawn(\"/bin/sh\", [\"-c\", fp + \" &\"], {detached:true}).unref() or spawn(\"cmd\",...). A.analytics_state marker file and DO_NOT_TRACK-shaped environment opt-outs are used as cover. The declared purpose (caching) has no relationship to fetching and executing a native binary from attacker-controlled infrastructure. ## Source: ghsa-malware (552aaa735c9fe984505fd2126c110c3219350dc76a922e50ffb6eef32c475337) Any computer that has this package installed or running should be considered fully compromised. All secrets and keys stored on that computer should be rotated immediately from a different computer. The package should be removed, but as full control of the computer may have been given",
    "evidence": "osv:MAL-2026-12076",
    "products": [
      {
        "name": {
          "value": "tinkoff-cache-path",
          "evidence": "/affected/0/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [],
        "affected_versions": [
          {
            "value": "20.8.3",
            "evidence": "/affected/0/versions"
          }
        ]
      }
    ],
    "severity": "unknown",
    "structured": {
      "id": "MAL-2026-12076",
      "aliases": [
        "GHSA-phw8-h49c-9v2q",
        "MAL-2026-12076"
      ],
      "affected": [
        {
          "ranges": [
            {
              "type": "SEMVER",
              "events": [
                {
                  "introduced": "0"
                }
              ]
            }
          ],
          "package": {
            "name": "tinkoff-cache-path",
            "purl": "pkg:npm/tinkoff-cache-path",
            "ecosystem": "npm"
          },
          "versions": [
            "20.8.3"
          ],
          "database_specific": {
            "cwes": [
              {
                "name": "Embedded Malicious Code",
                "cweId": "CWE-506",
                "description": "The product contains code that appears to be malicious in nature."
              },
              {
                "name": "Embedded Malicious Code",
                "cweId": "CWE-506",
                "description": "The product contains code that appears to be malicious in nature."
              }
            ],
            "source": "https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/tinkoff-cache-path/MAL-2026-12076.json",
            "indicators": {
              "evidence_files": [
                {
                  "path": "_compat.js",
                  "tlsh": "21a196a6156630198bb0ebe4c7175419f65be6632380c2d4fb9ca9981f7316483b2efc",
                  "sha256": "4f58c34cfd6196bc5f272509dfe74e27ef056726cabd887dc4cc11573da5e5b6"
                }
              ],
              "package_integrity": [
                {
                  "hashes": {
                    "sha1": "64a9e95fc6b351e8cadc3720f5a65a8af1737d33",
                    "sha512_sri": "sha512-/SfjAMFPDzc1qiS+FBKqvUN6X47aY3ISyWPoOg6Vf8kDs+8vFGIp06IWye8birDFkcmQPummrTG6uVf7eHPsKA=="
                  },
                  "filename": "tinkoff-cache-path-20.8.3.tgz"
                }
              ]
            }
          }
        }
      ],
      "modified": "2026-10-20T22:30:05.408238895Z",
      "provider": "osv",
      "references": [
        "https://www.npmjs.com/package/tinkoff-cache-path/v/20.8.3",
        "https://github.com/advisories/GHSA-phw8-h49c-9v2q"
      ],
      "provider_metadata": {
        "malicious-packages-origins": [
          {
            "id": "IN-MAL-2026-011509",
            "sha256": "9db3a162bd8fe3b6112b6d058e42245617122a41941d0b3a818254aba25ce59b",
            "source": "amazon-inspector",
            "versions": [
              "20.8.3"
            ],
            "import_time": "2026-08-05T03:11:15.531452205Z",
            "modified_time": "2026-08-05T01:40:03Z"
          },
          {
            "id": "GHSA-phw8-h49c-9v2q",
            "ranges": [
              {
                "type": "SEMVER",
                "events": [
                  {
                    "introduced": "0"
                  }
                ]
              }
            ],
            "sha256": "552aaa735c9fe984505fd2126c110c3219350dc76a922e50ffb6eef32c475337",
            "source": "ghsa-malware",
            "import_time": "2026-10-20T22:24:14.720570808Z",
            "modified_time": "2026-10-20T21:37:28Z"
          }
        ]
      }
    },
    "related_cves": [],
    "security_relevant": true,
    "severity_evidence": null
  },
  "source_id": "core-osv",
  "document_id": 390716,
  "published_at": "2026-08-05T01:40:03+00:00"
}