mal-2026-3314
Vulnerability from ossf_malicious_packages
Published
2026-05-01 15:01
Modified
2026-05-01 15:01
Summary
Malicious code in update-browserslist (npm)
Details

-= Per source details. Do not edit below this line.=-

Source: ossf-package-analysis (e29d806736ad7afce9367b004ad5ab1dbbde834ae2d51ae79b26d1f27f91ff7f)

The OpenSSF Package Analysis project identified 'update-browserslist' @ 99.1.1 (npm) as malicious.

It is considered malicious because:

  • The package communicates with a domain associated with malicious activity.
Credits
OpenSSF: Package Analysis github.com/ossf/package-analysis openssf.slack.com/channels/package_analysis
To clipboard 

{
  "affected": [
    {
      "package": {
        "ecosystem": "npm",
        "name": "update-browserslist"
      },
      "versions": [
        "99.1.1"
      ]
    }
  ],
  "credits": [
    {
      "contact": [
        "https://github.com/ossf/package-analysis",
        "https://openssf.slack.com/channels/package_analysis"
      ],
      "name": "OpenSSF: Package Analysis",
      "type": "FINDER"
    }
  ],
  "database_specific": {
    "malicious-packages-origins": [
      {
        "import_time": "2026-05-04T03:13:20.442230137Z",
        "modified_time": "2026-05-01T15:01:09Z",
        "sha256": "e29d806736ad7afce9367b004ad5ab1dbbde834ae2d51ae79b26d1f27f91ff7f",
        "source": "ossf-package-analysis",
        "versions": [
          "99.1.1"
        ]
      }
    ]
  },
  "details": "\n---\n_-= Per source details. Do not edit below this line.=-_\n\n## Source: ossf-package-analysis (e29d806736ad7afce9367b004ad5ab1dbbde834ae2d51ae79b26d1f27f91ff7f)\nThe OpenSSF Package Analysis project identified \u0027update-browserslist\u0027 @ 99.1.1 (npm) as malicious.\n\nIt is considered malicious because:\n\n- The package communicates with a domain associated with malicious activity.\n",
  "id": "MAL-2026-3314",
  "modified": "2026-05-01T15:01:09Z",
  "published": "2026-05-01T15:01:09Z",
  "schema_version": "1.7.4",
  "summary": "Malicious code in update-browserslist (npm)"
}


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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



Detection rules are retrieved from Rulezet.