MAL-2026-6301

    Dashboard / Malicious Package / MAL-2026-6301

    MAL-2026-6301

    Published: 23 Jun 2026Last Modified: 24 Jun 2026Aliases: 
    GHSA-j29f-62x7-hj66

    Summary: Malicious code in date-format-helper2 (npm)

    Details: Source: amazon-inspector (66c1775ce65ad47476ee1a0f1c7c5373e61466ec3eb4543cc658e67d2de22960) Package is advertised as a React date-formatting utility, but its postinstall.js performs targeted credential harvesting on npm install. The script reads Coze workload identity environment variables (COZE_WORKLOAD_API_TOKEN, COZE_WORKLOAD_IDENTITY_CLIENT_ID, COZE_WORKLOAD_IDENTITY_CLIENT_SECRET, COZE_WORKLOAD_IDENTITY_TOKEN_ENDPOINT, COZE_PROJECT_SPACE_ID), uses them to mint OAuth access tokens via three grant types (client_credentials, token-exchange, and a JSON body variant) against the configured token endpoint, enumerates ~30 Coze API paths against api.coze.cn / integration.coze.cn / api.coze.com using the minted tokens, and POSTs the env values, the issued tokens, and the API responses over plaintext HTTP to http://2e3bkumw.requestrepo.com — a public request-capture sinkhole controlled by the attacker. The advertised date-helper functionality in index.js is unrelated cover for the install-time credential theft. An installer running `npm install` in CI or a developer environment with Coze credentials in scope would have their workload identity stolen and the attacker could impersonate that workload against Coze APIs. Source: ghsa-malware (a13b8fd2717f710497955f390bdf36a5b52abda37b7f3bd47f737f98bfbbb5b4) 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 to an outside entity, there is no guarantee that removing the package will remove all malicious software resulting from installing it.

    References: https://www.npmjs.com/package/date-format-helper2/v/1.0.3, https://www.npmjs.com/package/date-format-helper2/v/1.0.7, https://www.npmjs.com/package/date-format-helper2/v/1.0.6, https://www.npmjs.com/package/date-format-helper2/v/1.0.2, https://www.npmjs.com/package/date-format-helper2/v/1.0.4, https://www.npmjs.com/package/date-format-helper2/v/1.0.5, https://www.npmjs.com/package/date-format-helper2/v/1.0.0, https://github.com/advisories/GHSA-j29f-62x7-hj66

    Affected packages

    Package

    Name: date-format-helper2

    Purl: pkg:npm/date-format-helper2

    Affected ranges

    Type: SEMVER

    Events:

    Introduced- 0
    Fixed -None

    Affected versions

    1.0.3
    1.0.7
    1.0.6
    1.0.2
    1.0.4
    1.0.5
    1.0.0