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PYSEC-2018-79
Vulnerability from pysec - Published: 2018-06-26 16:29 - Updated: 2021-08-25 04:30
VLAI
Details
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.
Impacted products
| Name | purl | websockets | pkg:pypi/websockets |
|---|
Aliases
{
"affected": [
{
"package": {
"ecosystem": "PyPI",
"name": "websockets",
"purl": "pkg:pypi/websockets"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "5.0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"0.1",
"1.0",
"2.0",
"2.1",
"2.2",
"2.3",
"2.4",
"2.5",
"2.6",
"2.7",
"3.0",
"3.1",
"3.2",
"3.3",
"3.4",
"4.0",
"4.0.1"
]
}
],
"aliases": [
"CVE-2018-1000518",
"GHSA-6g87-ff9q-v847"
],
"details": "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.",
"id": "PYSEC-2018-79",
"modified": "2021-08-25T04:30:36.925398Z",
"published": "2018-06-26T16:29:00Z",
"references": [
{
"type": "WEB",
"url": "https://github.com/aaugustin/websockets/pull/407"
},
{
"type": "ADVISORY",
"url": "https://github.com/advisories/GHSA-6g87-ff9q-v847"
}
]
}
BREW-PYTR-CVE-2018-1000518 (GHSA-6G87-FF9Q-V847)
Vulnerability from osv_homebrew – Published: 2026-08-13 17:29 – Updated: 2026-09-10 01:01 – Source website
VLAI
Summary
websockets is vulnerable to denial of service by memory exhaustion
Details
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
Severity
References
{
"affected": [
{
"ecosystem_specific": {
"fix": "bump",
"range_state": "fixed",
"resource": "websockets",
"resource_purl": "pkg:pypi/websockets@17.0.1",
"upstream_fixed_in": "5.0"
},
"package": {
"ecosystem": "Homebrew",
"name": "pytr",
"purl": "pkg:brew/pytr"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "0.4.10"
}
],
"type": "ECOSYSTEM"
}
]
}
],
"database_specific": {
"confidence": "high",
"source": "matched",
"strategy": "registry",
"upstream_evidence": [
{
"ecosystem": "PyPI",
"key": "pkg:pypi/websockets@17.0.1",
"name": "websockets",
"resource": "websockets",
"strategy": "registry",
"subject_version": "17.0.1"
}
]
},
"details": "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",
"id": "BREW-pytr-CVE-2018-1000518",
"modified": "2026-09-10T01:01:43Z",
"published": "2026-08-13T17:29:59Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2018-1000518"
},
{
"type": "WEB",
"url": "https://github.com/aaugustin/websockets/pull/407"
},
{
"type": "PACKAGE",
"url": "https://github.com/aaugustin/websockets"
},
{
"type": "WEB",
"url": "https://github.com/pypa/advisory-database/tree/main/vulns/websockets/PYSEC-2018-79.yaml"
}
],
"schema_version": "1.7.3",
"severity": [
{
"score": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
"type": "CVSS_V3"
},
{
"score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N",
"type": "CVSS_V4"
}
],
"summary": "websockets is vulnerable to denial of service by memory exhaustion",
"upstream": [
"GHSA-6g87-ff9q-v847",
"CVE-2018-1000518",
"PYSEC-2018-79"
]
}
BREW-RAPID-MLX-CVE-2018-… (GHSA-6G87-FF9Q-V847)
Vulnerability from osv_homebrew – Published: 2026-08-13 17:32 – Updated: 2026-09-10 20:37 – Source website
VLAI
Summary
websockets is vulnerable to denial of service by memory exhaustion
Details
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
Severity
References
{
"affected": [
{
"ecosystem_specific": {
"fix": "bump",
"range_state": "fixed",
"resource": "websockets",
"resource_purl": "pkg:pypi/websockets@17.1",
"upstream_fixed_in": "5.0"
},
"package": {
"ecosystem": "Homebrew",
"name": "rapid-mlx",
"purl": "pkg:brew/rapid-mlx"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "0.12.11"
}
],
"type": "ECOSYSTEM"
}
]
}
],
"database_specific": {
"confidence": "high",
"source": "matched",
"strategy": "registry",
"upstream_evidence": [
{
"ecosystem": "PyPI",
"key": "pkg:pypi/websockets@17.1",
"name": "websockets",
"resource": "websockets",
"strategy": "registry",
"subject_version": "17.1"
}
]
},
"details": "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",
"id": "BREW-rapid-mlx-CVE-2018-1000518",
"modified": "2026-09-10T20:37:34Z",
"published": "2026-08-13T17:32:07Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2018-1000518"
},
{
"type": "WEB",
"url": "https://github.com/aaugustin/websockets/pull/407"
},
{
"type": "PACKAGE",
"url": "https://github.com/aaugustin/websockets"
},
{
"type": "WEB",
"url": "https://github.com/pypa/advisory-database/tree/main/vulns/websockets/PYSEC-2018-79.yaml"
}
],
"schema_version": "1.7.3",
"severity": [
{
"score": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
"type": "CVSS_V3"
},
{
"score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N",
"type": "CVSS_V4"
}
],
"summary": "websockets is vulnerable to denial of service by memory exhaustion",
"upstream": [
"GHSA-6g87-ff9q-v847",
"CVE-2018-1000518",
"PYSEC-2018-79"
]
}
BREW-SLITHER-ANALYZER-CV… (GHSA-6G87-FF9Q-V847)
Vulnerability from osv_homebrew – Published: 2026-08-13 17:34 – Updated: 2026-09-10 20:54 – Source website
VLAI
Summary
websockets is vulnerable to denial of service by memory exhaustion
Details
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
Severity
References
{
"affected": [
{
"ecosystem_specific": {
"fix": "bump",
"range_state": "fixed",
"resource": "websockets",
"resource_purl": "pkg:pypi/websockets@15.0.1",
"upstream_fixed_in": "5.0"
},
"package": {
"ecosystem": "Homebrew",
"name": "slither-analyzer",
"purl": "pkg:brew/slither-analyzer"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "0.11.6"
}
],
"type": "ECOSYSTEM"
}
]
}
],
"database_specific": {
"confidence": "high",
"source": "matched",
"strategy": "registry",
"upstream_evidence": [
{
"ecosystem": "PyPI",
"key": "pkg:pypi/websockets@15.0.1",
"name": "websockets",
"resource": "websockets",
"strategy": "registry",
"subject_version": "15.0.1"
}
]
},
"details": "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",
"id": "BREW-slither-analyzer-CVE-2018-1000518",
"modified": "2026-09-10T20:54:13Z",
"published": "2026-08-13T17:34:41Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2018-1000518"
},
{
"type": "WEB",
"url": "https://github.com/aaugustin/websockets/pull/407"
},
{
"type": "PACKAGE",
"url": "https://github.com/aaugustin/websockets"
},
{
"type": "WEB",
"url": "https://github.com/pypa/advisory-database/tree/main/vulns/websockets/PYSEC-2018-79.yaml"
}
],
"schema_version": "1.7.3",
"severity": [
{
"score": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
"type": "CVSS_V3"
},
{
"score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N",
"type": "CVSS_V4"
}
],
"summary": "websockets is vulnerable to denial of service by memory exhaustion",
"upstream": [
"GHSA-6g87-ff9q-v847",
"CVE-2018-1000518",
"PYSEC-2018-79"
]
}
BREW-SYSAIDMIN-CVE-2018-… (GHSA-6G87-FF9Q-V847)
Vulnerability from osv_homebrew – Published: 2026-08-13 17:42 – Updated: 2026-09-10 01:24 – Source website
VLAI
Summary
websockets is vulnerable to denial of service by memory exhaustion
Details
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
Severity
References
{
"affected": [
{
"ecosystem_specific": {
"fix": "bump",
"range_state": "fixed",
"resource": "websockets",
"resource_purl": "pkg:pypi/websockets@16.1",
"upstream_fixed_in": "5.0"
},
"package": {
"ecosystem": "Homebrew",
"name": "sysaidmin",
"purl": "pkg:brew/sysaidmin"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "0.2.5_19"
}
],
"type": "ECOSYSTEM"
}
]
}
],
"database_specific": {
"confidence": "high",
"source": "matched",
"strategy": "registry",
"upstream_evidence": [
{
"ecosystem": "PyPI",
"key": "pkg:pypi/websockets@16.1",
"name": "websockets",
"resource": "websockets",
"strategy": "registry",
"subject_version": "16.1"
}
]
},
"details": "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",
"id": "BREW-sysaidmin-CVE-2018-1000518",
"modified": "2026-09-10T01:24:31Z",
"published": "2026-08-13T17:42:12Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2018-1000518"
},
{
"type": "WEB",
"url": "https://github.com/aaugustin/websockets/pull/407"
},
{
"type": "PACKAGE",
"url": "https://github.com/aaugustin/websockets"
},
{
"type": "WEB",
"url": "https://github.com/pypa/advisory-database/tree/main/vulns/websockets/PYSEC-2018-79.yaml"
}
],
"schema_version": "1.7.3",
"severity": [
{
"score": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
"type": "CVSS_V3"
},
{
"score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N",
"type": "CVSS_V4"
}
],
"summary": "websockets is vulnerable to denial of service by memory exhaustion",
"upstream": [
"GHSA-6g87-ff9q-v847",
"CVE-2018-1000518",
"PYSEC-2018-79"
]
}
BREW-TRZSZ-CVE-2018-1000518 (GHSA-6G87-FF9Q-V847)
Vulnerability from osv_homebrew – Published: 2026-08-13 17:44 – Updated: 2026-09-10 01:31 – Source website
VLAI
Summary
websockets is vulnerable to denial of service by memory exhaustion
Details
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
Severity
References
{
"affected": [
{
"ecosystem_specific": {
"fix": "bump",
"range_state": "fixed",
"resource": "websockets",
"resource_purl": "pkg:pypi/websockets@17.1",
"upstream_fixed_in": "5.0"
},
"package": {
"ecosystem": "Homebrew",
"name": "trzsz",
"purl": "pkg:brew/trzsz"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "1.1.5_3"
}
],
"type": "ECOSYSTEM"
}
]
}
],
"database_specific": {
"confidence": "high",
"source": "matched",
"strategy": "registry",
"upstream_evidence": [
{
"ecosystem": "PyPI",
"key": "pkg:pypi/websockets@17.1",
"name": "websockets",
"resource": "websockets",
"strategy": "registry",
"subject_version": "17.1"
}
]
},
"details": "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",
"id": "BREW-trzsz-CVE-2018-1000518",
"modified": "2026-09-10T01:31:23Z",
"published": "2026-08-13T17:44:53Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2018-1000518"
},
{
"type": "WEB",
"url": "https://github.com/aaugustin/websockets/pull/407"
},
{
"type": "PACKAGE",
"url": "https://github.com/aaugustin/websockets"
},
{
"type": "WEB",
"url": "https://github.com/pypa/advisory-database/tree/main/vulns/websockets/PYSEC-2018-79.yaml"
}
],
"schema_version": "1.7.3",
"severity": [
{
"score": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
"type": "CVSS_V3"
},
{
"score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N",
"type": "CVSS_V4"
}
],
"summary": "websockets is vulnerable to denial of service by memory exhaustion",
"upstream": [
"GHSA-6g87-ff9q-v847",
"CVE-2018-1000518",
"PYSEC-2018-79"
]
}
BREW-TUBEUP-CVE-2018-1000518 (GHSA-6G87-FF9Q-V847)
Vulnerability from osv_homebrew – Published: 2026-08-13 17:44 – Updated: 2026-09-10 01:31 – Source website
VLAI
Summary
websockets is vulnerable to denial of service by memory exhaustion
Details
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
Severity
References
{
"affected": [
{
"ecosystem_specific": {
"fix": "bump",
"range_state": "fixed",
"resource": "websockets",
"resource_purl": "pkg:pypi/websockets@16.1.1",
"upstream_fixed_in": "5.0"
},
"package": {
"ecosystem": "Homebrew",
"name": "tubeup",
"purl": "pkg:brew/tubeup"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "2026.5.8_1"
}
],
"type": "ECOSYSTEM"
}
]
}
],
"database_specific": {
"confidence": "high",
"source": "matched",
"strategy": "registry",
"upstream_evidence": [
{
"ecosystem": "PyPI",
"key": "pkg:pypi/websockets@16.1.1",
"name": "websockets",
"resource": "websockets",
"strategy": "registry",
"subject_version": "16.1.1"
}
]
},
"details": "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",
"id": "BREW-tubeup-CVE-2018-1000518",
"modified": "2026-09-10T01:31:23Z",
"published": "2026-08-13T17:44:53Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2018-1000518"
},
{
"type": "WEB",
"url": "https://github.com/aaugustin/websockets/pull/407"
},
{
"type": "PACKAGE",
"url": "https://github.com/aaugustin/websockets"
},
{
"type": "WEB",
"url": "https://github.com/pypa/advisory-database/tree/main/vulns/websockets/PYSEC-2018-79.yaml"
}
],
"schema_version": "1.7.3",
"severity": [
{
"score": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
"type": "CVSS_V3"
},
{
"score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N",
"type": "CVSS_V4"
}
],
"summary": "websockets is vulnerable to denial of service by memory exhaustion",
"upstream": [
"GHSA-6g87-ff9q-v847",
"CVE-2018-1000518",
"PYSEC-2018-79"
]
}
BREW-UVICORN-CVE-2018-1000518 (GHSA-6G87-FF9Q-V847)
Vulnerability from osv_homebrew – Published: 2026-08-13 17:46 – Updated: 2026-09-16 10:41 – Source website
VLAI
Summary
websockets is vulnerable to denial of service by memory exhaustion
Details
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
Severity
References
{
"affected": [
{
"ecosystem_specific": {
"fix": "bump",
"range_state": "fixed",
"resource": "websockets",
"resource_purl": "pkg:pypi/websockets@17.1",
"upstream_fixed_in": "5.0"
},
"package": {
"ecosystem": "Homebrew",
"name": "uvicorn",
"purl": "pkg:brew/uvicorn"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "0.52.1"
}
],
"type": "ECOSYSTEM"
}
]
}
],
"database_specific": {
"confidence": "high",
"source": "matched",
"strategy": "registry",
"upstream_evidence": [
{
"ecosystem": "PyPI",
"key": "pkg:pypi/websockets@17.1",
"name": "websockets",
"resource": "websockets",
"strategy": "registry",
"subject_version": "17.1"
}
]
},
"details": "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",
"id": "BREW-uvicorn-CVE-2018-1000518",
"modified": "2026-09-16T10:41:43Z",
"published": "2026-08-13T17:46:24Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2018-1000518"
},
{
"type": "WEB",
"url": "https://github.com/aaugustin/websockets/pull/407"
},
{
"type": "PACKAGE",
"url": "https://github.com/aaugustin/websockets"
},
{
"type": "WEB",
"url": "https://github.com/pypa/advisory-database/tree/main/vulns/websockets/PYSEC-2018-79.yaml"
}
],
"schema_version": "1.7.3",
"severity": [
{
"score": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
"type": "CVSS_V3"
},
{
"score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N",
"type": "CVSS_V4"
}
],
"summary": "websockets is vulnerable to denial of service by memory exhaustion",
"upstream": [
"GHSA-6g87-ff9q-v847",
"CVE-2018-1000518",
"PYSEC-2018-79"
]
}
BREW-YT-DLP-CVE-2018-1000518 (GHSA-6G87-FF9Q-V847)
Vulnerability from osv_homebrew – Published: 2026-08-13 17:55 – Updated: 2026-09-10 21:33 – Source website
VLAI
Summary
websockets is vulnerable to denial of service by memory exhaustion
Details
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
Severity
References
{
"affected": [
{
"ecosystem_specific": {
"fix": "bump",
"range_state": "fixed",
"resource": "websockets",
"resource_purl": "pkg:pypi/websockets@17.1",
"upstream_fixed_in": "5.0"
},
"package": {
"ecosystem": "Homebrew",
"name": "yt-dlp",
"purl": "pkg:brew/yt-dlp"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "2026.7.4"
}
],
"type": "ECOSYSTEM"
}
]
}
],
"database_specific": {
"confidence": "high",
"source": "matched",
"strategy": "registry",
"upstream_evidence": [
{
"ecosystem": "PyPI",
"key": "pkg:pypi/websockets@17.1",
"name": "websockets",
"resource": "websockets",
"strategy": "registry",
"subject_version": "17.1"
}
]
},
"details": "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",
"id": "BREW-yt-dlp-CVE-2018-1000518",
"modified": "2026-09-10T21:33:20Z",
"published": "2026-08-13T17:55:05Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2018-1000518"
},
{
"type": "WEB",
"url": "https://github.com/aaugustin/websockets/pull/407"
},
{
"type": "PACKAGE",
"url": "https://github.com/aaugustin/websockets"
},
{
"type": "WEB",
"url": "https://github.com/pypa/advisory-database/tree/main/vulns/websockets/PYSEC-2018-79.yaml"
}
],
"schema_version": "1.7.3",
"severity": [
{
"score": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
"type": "CVSS_V3"
},
{
"score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N",
"type": "CVSS_V4"
}
],
"summary": "websockets is vulnerable to denial of service by memory exhaustion",
"upstream": [
"GHSA-6g87-ff9q-v847",
"CVE-2018-1000518",
"PYSEC-2018-79"
]
}
CVE-2018-1000518 (GCVE-0-2018-1000518)
Vulnerability from cvelistv5 – Published: 2018-06-26 16:00 – Updated: 2024-08-05 12:40
VLAI
EPSS
VEX
Summary
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.
Severity
No CVSS data available.
CWE
- n/a
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://github.com/aaugustin/websockets/pull/407 | x_refsource_MISC |
Date Public
2018-06-26 00:00
{
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"dateUpdated": "2024-08-05T12:40:47.112Z",
"orgId": "af854a3a-2127-422b-91ae-364da2661108",
"shortName": "CVE"
},
"references": [
{
"tags": [
"x_refsource_MISC",
"x_transferred"
],
"url": "https://github.com/aaugustin/websockets/pull/407"
}
],
"title": "CVE Program Container"
}
],
"cna": {
"affected": [
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"product": "n/a",
"vendor": "n/a",
"versions": [
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"version": "n/a"
}
]
}
],
"dateAssigned": "2018-06-23T00:00:00.000Z",
"datePublic": "2018-06-26T00:00:00.000Z",
"descriptions": [
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"value": "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."
}
],
"problemTypes": [
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"dateUpdated": "2018-06-26T15:57:01.000Z",
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},
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"tags": [
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],
"url": "https://github.com/aaugustin/websockets/pull/407"
}
],
"x_legacyV4Record": {
"CVE_data_meta": {
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"DATE_ASSIGNED": "2018-06-23T11:22:33.021015",
"DATE_REQUESTED": "2018-05-19T11:13:06",
"ID": "CVE-2018-1000518",
"REQUESTER": "aymeric.augustin@fractalideas.com",
"STATE": "PUBLIC"
},
"affects": {
"vendor": {
"vendor_data": [
{
"product": {
"product_data": [
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"product_name": "n/a",
"version": {
"version_data": [
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"problemtype": {
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"cveMetadata": {
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"dataVersion": "5.1"
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GHSA-6G87-FF9Q-V847
Vulnerability from github – Published: 2018-09-17 20:46 – Updated: 2024-11-19 18:06
VLAI
Summary
websockets is vulnerable to denial of service by memory exhaustion
Details
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
Severity
{
"affected": [
{
"package": {
"ecosystem": "PyPI",
"name": "websockets"
},
"ranges": [
{
"events": [
{
"introduced": "4.0"
},
{
"fixed": "5.0"
}
],
"type": "ECOSYSTEM"
}
]
}
],
"aliases": [
"CVE-2018-1000518"
],
"database_specific": {
"cwe_ids": [
"CWE-400"
],
"github_reviewed": true,
"github_reviewed_at": "2020-06-16T21:19:15Z",
"nvd_published_at": "2018-06-26T16:29:00Z",
"severity": "HIGH"
},
"details": "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",
"id": "GHSA-6g87-ff9q-v847",
"modified": "2024-11-19T18:06:51Z",
"published": "2018-09-17T20:46:52Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2018-1000518"
},
{
"type": "WEB",
"url": "https://github.com/aaugustin/websockets/pull/407"
},
{
"type": "PACKAGE",
"url": "https://github.com/aaugustin/websockets"
},
{
"type": "WEB",
"url": "https://github.com/pypa/advisory-database/tree/main/vulns/websockets/PYSEC-2018-79.yaml"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
"type": "CVSS_V3"
},
{
"score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N",
"type": "CVSS_V4"
}
],
"summary": "websockets is vulnerable to denial of service by memory exhaustion"
}
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Trend slope:
-
(linear fit over daily sighting counts)
Show additional events:
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
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Related by attack behaviour
Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.
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