Malicious code in css-overscroll-contain (npm)

{
  "id": "d80873a0aa0cc5717f0b9ba89179a0af0b73b97264ae10ccffacfc8fc9ca576b",
  "url": "https://osv.dev/vulnerability/MAL-2026-17705",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "Malicious code in css-overscroll-contain (npm)",
    "summary": "--- _-= Per source details. Do not edit below this line.=-_ ## Source: amazon-inspector (5d978121f021eb6136e6a34db790556ba757de3bb8fa81981903445baf025d16) The package advertises itself as a CSS overscroll-behavior utility but its shipped modules (thunderboltRegistry.js and sibling files named after Wix-internal registries such as siteAssetsRegistry, editorRegistry, corvidRegistry) run a self-executing IIFE at module load that performs host reconnaissance and bulk credential theft. The IIFE uses child_process.execSync and https.get/fetch to collect host identity (uname, hostname/id), file descriptors, /proc/self/mountinfo, network/DNS data, process environment variables matched by the pattern (KEY|TOKEN|SECRET|AUTH|...), and the Kubernetes service-account token at /var/run/secrets/kubernetes.io/serviceaccount/token, posting each result to the hardcoded endpoint https://dxpoc.gt.tc/callback.php/bb8968d0f67000433bf7005dd5ad2d1f. The same load-time code probes container-escape primitives via unshare --user --mount with devtmpfs/cgroup/release_agent mounts and a perl memfd_create+exec sequence, and ships a registry-manifest.min.json that points at static.parastorage.com/unpkg/css-overscroll-contain@1.0.1/ so the package resolves inside Wix thunderbolt build infrastructure. The declared package purpose, the Wix-internal export names, the attacker endpoint, and the credential-grade data flow are all incompatible with a legitimate CSS utility. ## Source: ghsa-malware (c440f21513c5906",
    "evidence": "osv:MAL-2026-17705",
    "products": [
      {
        "name": {
          "value": "css-overscroll-contain",
          "evidence": "/affected/0/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [],
        "affected_versions": [
          {
            "value": "1.0.1",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "1.0.2",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "1.0.3",
            "evidence": "/affected/0/versions"
          }
        ]
      }
    ],
    "severity": "unknown",
    "structured": {
      "id": "MAL-2026-17705",
      "aliases": [
        "GHSA-xjrr-fv8j-9hw7",
        "MAL-2026-17705"
      ],
      "affected": [
        {
          "ranges": [
            {
              "type": "SEMVER",
              "events": [
                {
                  "introduced": "0"
                }
              ]
            }
          ],
          "package": {
            "name": "css-overscroll-contain",
            "purl": "pkg:npm/css-overscroll-contain",
            "ecosystem": "npm"
          },
          "versions": [
            "1.0.1",
            "1.0.2",
            "1.0.3"
          ],
          "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."
              },
              {
                "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/css-overscroll-contain/MAL-2026-17705.json",
            "indicators": {
              "evidence_files": [
                {
                  "path": "thunderboltRegistry.js",
                  "tlsh": "2de1a5a474ece41071a334b4bbbfa44bbbb798171d69b99070c485b41fb00bc51a9df6",
                  "sha256": "0bebf66b8f89240b99cbe6dadc92023156e6155740e272d3e7a43aa138b8b675"
                }
              ],
              "package_integrity": [
                {
                  "hashes": {
                    "sha1": "a72a1a6f95a84bc091063dc866ea2239f2a2358a",
                    "sha512_sri": "sha512-oV6aW5NyUkBtWV715bXq8DPtL4eX3BZ6IqmL7xPCy9OAkvReC8ZIcF4ey1wTr6CLqBR8gLVwEBSJCqgc16kBaw=="
                  },
                  "filename": "css-overscroll-contain-1.0.1.tgz"
                }
              ]
            }
          }
        }
      ],
      "modified": "2026-10-26T01:45:24.185667517Z",
      "provider": "osv",
      "references": [
        "https://www.npmjs.com/package/css-overscroll-contain/v/1.0.1",
        "https://www.npmjs.com/package/css-overscroll-contain/v/1.0.2",
        "https://www.npmjs.com/package/css-overscroll-contain/v/1.0.3",
        "https://github.com/advisories/GHSA-xjrr-fv8j-9hw7"
      ],
      "provider_metadata": {
        "malicious-packages-origins": [
          {
            "id": "IN-MAL-2026-021238",
            "sha256": "5d978121f021eb6136e6a34db790556ba757de3bb8fa81981903445baf025d16",
            "source": "amazon-inspector",
            "versions": [
              "1.0.1"
            ],
            "import_time": "2026-10-08T21:42:55.420725689Z",
            "modified_time": "2026-10-08T21:19:35Z"
          },
          {
            "id": "IN-MAL-2026-021237",
            "sha256": "b52a74f79ae282ee490c5011d4919480fccd55c1e83d1e52b15020a32da34dc6",
            "source": "amazon-inspector",
            "versions": [
              "1.0.2"
            ],
            "import_time": "2026-10-08T21:42:55.316485381Z",
            "modified_time": "2026-10-08T21:19:28Z"
          },
          {
            "id": "IN-MAL-2026-021235",
            "sha256": "d51077106ae3eee19a2858b1476f3c72b2c6bf678d14e50c85441160ba13dde8",
            "source": "amazon-inspector",
            "versions": [
              "1.0.3"
            ],
            "import_time": "2026-10-08T21:42:55.126202656Z",
            "modified_time": "2026-10-08T21:19:11Z"
          },
          {
            "id": "GHSA-xjrr-fv8j-9hw7",
            "ranges": [
              {
                "type": "SEMVER",
                "events": [
                  {
                    "introduced": "0"
                  }
                ]
              }
            ],
            "sha256": "c440f21513c5906401313e514337afb37c7fcc30ca12f9e9ca4e7b3badb714af",
            "source": "ghsa-malware",
            "import_time": "2026-10-26T01:39:10.999153819Z",
            "modified_time": "2026-10-26T01:34:10Z"
          }
        ]
      }
    },
    "related_cves": [],
    "security_relevant": true,
    "severity_evidence": null
  },
  "source_id": "core-osv",
  "document_id": 104700,
  "published_at": "2026-10-08T21:19:11+00:00"
}