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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"
}
BREW-APM-CVE-2018-1000518 (GHSA-6G87-FF9Q-V847)
Vulnerability from osv_homebrew – Published: 2026-08-13 16:35 – Updated: 2026-09-10 18:52 – 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": "apm",
"purl": "pkg:brew/apm"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "0.28.0"
}
],
"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-apm-CVE-2018-1000518",
"modified": "2026-09-10T18:52:52Z",
"published": "2026-08-13T16:35:55Z",
"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-BBOT-CVE-2018-1000518 (GHSA-6G87-FF9Q-V847)
Vulnerability from osv_homebrew – Published: 2026-08-13 16:37 – Updated: 2026-09-09 23:43 – 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": "bbot",
"purl": "pkg:brew/bbot"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "3.0.1"
}
],
"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-bbot-CVE-2018-1000518",
"modified": "2026-09-09T23:43:32Z",
"published": "2026-08-13T16:37:10Z",
"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-BITTENSOR-CVE-2018-… (GHSA-6G87-FF9Q-V847)
Vulnerability from osv_homebrew – Published: 2026-08-13 16:38 – Updated: 2026-09-09 23:44 – 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": "bittensor",
"purl": "pkg:brew/bittensor"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "11.0.2"
}
],
"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-bittensor-CVE-2018-1000518",
"modified": "2026-09-09T23:44:25Z",
"published": "2026-08-13T16:38:09Z",
"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-BTCLI-CVE-2018-1000518 (GHSA-6G87-FF9Q-V847)
Vulnerability from osv_homebrew – Published: 2026-08-13 16:38 – Updated: 2026-09-09 23:44 – 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": "btcli",
"purl": "pkg:brew/btcli"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "9.23.2"
}
],
"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-btcli-CVE-2018-1000518",
"modified": "2026-09-09T23:44:39Z",
"published": "2026-08-13T16:38:25Z",
"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-DSTACK-CVE-2018-1000518 (GHSA-6G87-FF9Q-V847)
Vulnerability from osv_homebrew – Published: 2026-08-13 16:43 – Updated: 2026-09-09 23:52 – 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": "dstack",
"purl": "pkg:brew/dstack"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "0.21.0"
}
],
"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-dstack-CVE-2018-1000518",
"modified": "2026-09-09T23:52:28Z",
"published": "2026-08-13T16:43:57Z",
"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-ESBONIO-CVE-2018-1000518 (GHSA-6G87-FF9Q-V847)
Vulnerability from osv_homebrew – Published: 2026-08-13 16:45 – Updated: 2026-09-10 19:07 – 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@16.0",
"upstream_fixed_in": "5.0"
},
"package": {
"ecosystem": "Homebrew",
"name": "esbonio",
"purl": "pkg:brew/esbonio"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "2.1.0"
}
],
"type": "ECOSYSTEM"
}
]
}
],
"database_specific": {
"confidence": "high",
"source": "matched",
"strategy": "registry",
"upstream_evidence": [
{
"ecosystem": "PyPI",
"key": "pkg:pypi/websockets@16.0",
"name": "websockets",
"resource": "websockets",
"strategy": "registry",
"subject_version": "16.0"
}
]
},
"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-esbonio-CVE-2018-1000518",
"modified": "2026-09-10T19:07:45Z",
"published": "2026-08-13T16:45:08Z",
"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-ESPTOOL-CVE-2018-1000518 (GHSA-6G87-FF9Q-V847)
Vulnerability from osv_homebrew – Published: 2026-09-04 08:57 – Updated: 2026-09-09 23:53 – 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": "esptool",
"purl": "pkg:brew/esptool"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "3.0_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-esptool-CVE-2018-1000518",
"modified": "2026-09-09T23:53:49Z",
"published": "2026-09-04T08:57:54Z",
"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-FASTAPI-CVE-2018-1000518 (GHSA-6G87-FF9Q-V847)
Vulnerability from osv_homebrew – Published: 2026-08-13 16:46 – Updated: 2026-09-09 23:55 – 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": "fastapi",
"purl": "pkg:brew/fastapi"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "0.141.1"
}
],
"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-fastapi-CVE-2018-1000518",
"modified": "2026-09-09T23:55:50Z",
"published": "2026-08-13T16:46:30Z",
"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-FASTMCP-CVE-2018-1000518 (GHSA-6G87-FF9Q-V847)
Vulnerability from osv_homebrew – Published: 2026-08-13 16:46 – Updated: 2026-09-09 23:56 – 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": "fastmcp",
"purl": "pkg:brew/fastmcp"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "3.4.7"
}
],
"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-fastmcp-CVE-2018-1000518",
"modified": "2026-09-09T23:56:32Z",
"published": "2026-08-13T16:46:31Z",
"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-GALLERY-DL-CVE-2018… (GHSA-6G87-FF9Q-V847)
Vulnerability from osv_homebrew – Published: 2026-08-13 16:49 – Updated: 2026-09-09 23:59 – 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": "gallery-dl",
"purl": "pkg:brew/gallery-dl"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "1.32.9"
}
],
"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-gallery-dl-CVE-2018-1000518",
"modified": "2026-09-09T23:59:22Z",
"published": "2026-08-13T16:49:04Z",
"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"
]
}
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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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