websockets is vulnerable to denial of service by memory exhaustion

ALTO 7.5CVE-2018-1000518 · GHSA-6g87-ff9q-v847 · PYSEC-2018-79 · Published 26/06/2018 · updated 17/06/2026

Em resumo

CVE-2018-1000518 é uma vulnerabilidade ALTO (CVSS 7.5) que afeta websockets, websockets (websockets project).
Chance de exploração nos próximos 30 dias (EPSS): 1.8%, maior que 78.9% das vulnerabilidades.
Correção: atualize para 5.0 ou posterior.

Package	Affected versions	Patched versions
websockets PyPI	`≥ 4.0, < 5.0< 5.0`	`5.0`
websockets websockets_project	`= 4.0`	No fix yet

Description

The Python websockets library version 4 contains a CWE-409: Improper Handling of Highly Compressed Data (Data Amplification) vulnerability in Servers and clients, unless configured with compression=None that can result in Denial of Service by memory exhaustion. This attack appears to be exploitable via sending a specially crafted frame on an established connection. This vulnerability appears to have been fixed in version 5.0

NVD description

aaugustin websockets version 4 contains a CWE-409: Improper Handling of Highly Compressed Data (Data Amplification) vulnerability in Servers and clients, unless configured with compression=None that can result in Denial of Service by memory exhaustion. This attack appear to be exploitable via Sending a specially crafted frame on an established connection. This vulnerability appears to have been fixed in 5.

References

nvd.nist.gov/vuln/detail/CVE-2018-1000518 · ADVISORY
aaugustin/websockets#407 · WEB
aaugustin/websockets · PACKAGE
pypa/advisory-database · WEB
GitHub Advisory GHSA-6g87-ff9q-v847 · ADVISORY

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Package

Affected versions

Patched versions

websockets

PyPI

≥ 4.0, < 5.0< 5.0

5.0

websockets

websockets_project

= 4.0

No fix yet

Description

NVD description