flatmap-stream (npm)

Known vulnerabilities and malicious package reports for flatmap-stream on npm, live from OSV, with CISA KEV exploitation status and EPSS scores.

Known package reports

1 malicious package report and 2 vulnerabilities returned by OSV. Check a specific version to see which reports apply.

If you installed a reported malicious release, remove it and rotate the credentials that machine could access. Upgrading does not undo code that already ran.

MAL-2025-20690: Malicious package report

Malicious code in flatmap-stream (npm)

Published 2025-08-14.

Updated 2025-08-14.

Affected ranges: introduced 0.

GHSA-9x64-5r7x-2q53: Vulnerability

Malicious Package in flatmap-stream

Published 2020-09-01.

Updated 2021-10-01.

Reported affected releases: 0.1.1.

Severity: CRITICAL.

GHSA-mh6f-8j2x-4483: Vulnerability

Critical severity vulnerability that affects event-stream and flatmap-stream

Published 2018-11-26.

Updated 2021-09-15.

Affected ranges: introduced 0.

Severity: CRITICAL.

Source: OSV, including OpenSSF malicious-package reports and GitHub advisories. No known report is not proof a package is safe.