CVE-2019-9674Public exploitNetwork attack vector

Denial of service via unbounded ZIP extraction

Published Feb 4, 2020 · Updated Aug 4, 2024

Resource-consumption denial of service in Python through 3.7.2 allows remote attackers to exhaust resources via a crafted ZIP bomb. ZipFile extraction accepts member data whose actual decompressed length greatly exceeds the size announced in the archive and writes the full output to disk. An application must accept and extract an attacker-supplied archive; successful exploitation can fill storage and interrupt the application or host.

CVSS severity7.5
High
EPSS probability5.54%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Resource-consumption denial of service in Python through 3.7.2 allows remote attackers to exhaust resources via a crafted ZIP bomb. ZipFile extraction accepts member data whose actual decompressed length greatly exceeds the size announced in the archive and writes the full output to disk. An application must accept and extract an attacker-supplied archive; successful exploitation can fill storage and interrupt the application or host.

The record

CVE
CVE-2019-9674
Published
Feb 4, 2020
Updated
Aug 4, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-409, T1499
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Feb 4, 2020CVE publishedPublication date reported by the CVE source.
  2. Aug 4, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

7.5UbuntuCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-409Improper Handling of Highly Compressed Data (Data Amplification)
T1499Endpoint Denial of Service

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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