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PYSEC-2020-176
Vulnerability from pysec - Published: 2020-02-19 04:15 - Updated: 2020-03-01 00:15
VLAI
Details
PyYAML 5.1 through 5.1.2 has insufficient restrictions on the load and load_all functions because of a class deserialization issue, e.g., Popen is a class in the subprocess module. NOTE: this issue exists because of an incomplete fix for CVE-2017-18342.
Impacted products
| Name | purl | pyyaml | pkg:pypi/pyyaml |
|---|
Aliases
{
"affected": [
{
"package": {
"ecosystem": "PyPI",
"name": "pyyaml",
"purl": "pkg:pypi/pyyaml"
},
"ranges": [
{
"events": [
{
"introduced": "5.1"
},
{
"fixed": "5.2b1"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"5.1",
"5.1.1",
"5.1.2"
]
}
],
"aliases": [
"CVE-2019-20477",
"GHSA-3pqx-4fqf-j49f"
],
"details": "PyYAML 5.1 through 5.1.2 has insufficient restrictions on the load and load_all functions because of a class deserialization issue, e.g., Popen is a class in the subprocess module. NOTE: this issue exists because of an incomplete fix for CVE-2017-18342.",
"id": "PYSEC-2020-176",
"modified": "2020-03-01T00:15:00Z",
"published": "2020-02-19T04:15:00Z",
"references": [
{
"type": "WEB",
"url": "https://www.exploit-db.com/download/47655"
},
{
"type": "WEB",
"url": "https://github.com/yaml/pyyaml/blob/master/CHANGES"
},
{
"type": "WEB",
"url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/52N5XS73Z5S4ZN7I7R56ICCPCTKCUV4H/"
},
{
"type": "WEB",
"url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/33VBUY73AA6CTTYL3LRWHNFDULV7PFPN/"
},
{
"type": "ADVISORY",
"url": "https://github.com/advisories/GHSA-3pqx-4fqf-j49f"
}
]
}
BREW-ANSIBLE@13-CVE-2019-20477 (GHSA-3PQX-4FQF-J49F)
Vulnerability from osv_homebrew – Published: 2026-08-13 16:35 – Updated: 2026-09-10 18:51 – Source website
VLAI
Summary
Deserialization of Untrusted Data in PyYAML
Details
PyYAML 5.1 through 5.1.2 has insufficient restrictions on the load and load_all functions because of a class deserialization issue, e.g., Popen is a class in the subprocess module. NOTE: this issue exists because of an incomplete fix for CVE-2017-18342.
Severity
9.8 (Critical)
References
{
"affected": [
{
"ecosystem_specific": {
"fix": "bump",
"range_state": "fixed",
"resource": "pyyaml",
"resource_purl": "pkg:pypi/pyyaml@6.0.3",
"upstream_fixed_in": "5.2"
},
"package": {
"ecosystem": "Homebrew",
"name": "ansible@13",
"purl": "pkg:brew/ansible%4013"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "13.8.0_2"
}
],
"type": "ECOSYSTEM"
}
]
}
],
"database_specific": {
"confidence": "high",
"source": "matched",
"strategy": "registry",
"upstream_evidence": [
{
"ecosystem": "PyPI",
"key": "pkg:pypi/pyyaml@6.0.3",
"name": "pyyaml",
"resource": "pyyaml",
"strategy": "registry",
"subject_version": "6.0.3"
}
]
},
"details": "PyYAML 5.1 through 5.1.2 has insufficient restrictions on the load and load_all functions because of a class deserialization issue, e.g., Popen is a class in the subprocess module. NOTE: this issue exists because of an incomplete fix for CVE-2017-18342.",
"id": "BREW-ansible@13-CVE-2019-20477",
"modified": "2026-09-10T18:51:29Z",
"published": "2026-08-13T16:35:22Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2019-20477"
},
{
"type": "ADVISORY",
"url": "https://github.com/advisories/GHSA-3pqx-4fqf-j49f"
},
{
"type": "WEB",
"url": "https://github.com/pypa/advisory-database/tree/main/vulns/pyyaml/PYSEC-2020-176.yaml"
},
{
"type": "PACKAGE",
"url": "https://github.com/yaml/pyyaml"
},
{
"type": "WEB",
"url": "https://github.com/yaml/pyyaml/blob/master/CHANGES"
},
{
"type": "WEB",
"url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/33VBUY73AA6CTTYL3LRWHNFDULV7PFPN"
},
{
"type": "WEB",
"url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/52N5XS73Z5S4ZN7I7R56ICCPCTKCUV4H"
},
{
"type": "WEB",
"url": "https://www.exploit-db.com/download/47655"
}
],
"schema_version": "1.7.3",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
},
{
"score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N",
"type": "CVSS_V4"
}
],
"summary": "Deserialization of Untrusted Data in PyYAML",
"upstream": [
"GHSA-3pqx-4fqf-j49f",
"CVE-2019-20477",
"PYSEC-2020-176"
]
}
BREW-ANSIBLE@9-CVE-2019-20477 (GHSA-3PQX-4FQF-J49F)
Vulnerability from osv_homebrew – Published: 2026-08-13 16:35 – Updated: 2026-09-09 23:41 – Source website
VLAI
Summary
Deserialization of Untrusted Data in PyYAML
Details
PyYAML 5.1 through 5.1.2 has insufficient restrictions on the load and load_all functions because of a class deserialization issue, e.g., Popen is a class in the subprocess module. NOTE: this issue exists because of an incomplete fix for CVE-2017-18342.
Severity
9.8 (Critical)
References
| URL | Type | |||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
||||||||||||||||||||||||||
{
"affected": [
{
"ecosystem_specific": {
"fix": "bump",
"range_state": "fixed",
"resource": "pyyaml",
"resource_purl": "pkg:pypi/pyyaml@6.0.3",
"upstream_fixed_in": "5.2"
},
"package": {
"ecosystem": "Homebrew",
"name": "ansible@9",
"purl": "pkg:brew/ansible%409"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "9.13.0_4"
}
],
"type": "ECOSYSTEM"
}
]
}
],
"database_specific": {
"confidence": "high",
"source": "matched",
"strategy": "registry",
"upstream_evidence": [
{
"ecosystem": "PyPI",
"key": "pkg:pypi/pyyaml@6.0.3",
"name": "pyyaml",
"resource": "pyyaml",
"strategy": "registry",
"subject_version": "6.0.3"
}
]
},
"details": "PyYAML 5.1 through 5.1.2 has insufficient restrictions on the load and load_all functions because of a class deserialization issue, e.g., Popen is a class in the subprocess module. NOTE: this issue exists because of an incomplete fix for CVE-2017-18342.",
"id": "BREW-ansible@9-CVE-2019-20477",
"modified": "2026-09-09T23:41:06Z",
"published": "2026-08-13T16:35:23Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2019-20477"
},
{
"type": "ADVISORY",
"url": "https://github.com/advisories/GHSA-3pqx-4fqf-j49f"
},
{
"type": "WEB",
"url": "https://github.com/pypa/advisory-database/tree/main/vulns/pyyaml/PYSEC-2020-176.yaml"
},
{
"type": "PACKAGE",
"url": "https://github.com/yaml/pyyaml"
},
{
"type": "WEB",
"url": "https://github.com/yaml/pyyaml/blob/master/CHANGES"
},
{
"type": "WEB",
"url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/33VBUY73AA6CTTYL3LRWHNFDULV7PFPN"
},
{
"type": "WEB",
"url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/52N5XS73Z5S4ZN7I7R56ICCPCTKCUV4H"
},
{
"type": "WEB",
"url": "https://www.exploit-db.com/download/47655"
}
],
"schema_version": "1.7.3",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
},
{
"score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N",
"type": "CVSS_V4"
}
],
"summary": "Deserialization of Untrusted Data in PyYAML",
"upstream": [
"GHSA-3pqx-4fqf-j49f",
"CVE-2019-20477",
"PYSEC-2020-176"
]
}
BREW-APM-CVE-2019-20477 (GHSA-3PQX-4FQF-J49F)
Vulnerability from osv_homebrew – Published: 2026-08-13 16:35 – Updated: 2026-09-10 18:52 – Source website
VLAI
Summary
Deserialization of Untrusted Data in PyYAML
Details
PyYAML 5.1 through 5.1.2 has insufficient restrictions on the load and load_all functions because of a class deserialization issue, e.g., Popen is a class in the subprocess module. NOTE: this issue exists because of an incomplete fix for CVE-2017-18342.
Severity
9.8 (Critical)
References
| URL | Type | |||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
||||||||||||||||||||||||||
{
"affected": [
{
"ecosystem_specific": {
"fix": "bump",
"range_state": "fixed",
"resource": "pyyaml",
"resource_purl": "pkg:pypi/pyyaml@6.0.3",
"upstream_fixed_in": "5.2"
},
"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/pyyaml@6.0.3",
"name": "pyyaml",
"resource": "pyyaml",
"strategy": "registry",
"subject_version": "6.0.3"
}
]
},
"details": "PyYAML 5.1 through 5.1.2 has insufficient restrictions on the load and load_all functions because of a class deserialization issue, e.g., Popen is a class in the subprocess module. NOTE: this issue exists because of an incomplete fix for CVE-2017-18342.",
"id": "BREW-apm-CVE-2019-20477",
"modified": "2026-09-10T18:52:52Z",
"published": "2026-08-13T16:35:55Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2019-20477"
},
{
"type": "ADVISORY",
"url": "https://github.com/advisories/GHSA-3pqx-4fqf-j49f"
},
{
"type": "WEB",
"url": "https://github.com/pypa/advisory-database/tree/main/vulns/pyyaml/PYSEC-2020-176.yaml"
},
{
"type": "PACKAGE",
"url": "https://github.com/yaml/pyyaml"
},
{
"type": "WEB",
"url": "https://github.com/yaml/pyyaml/blob/master/CHANGES"
},
{
"type": "WEB",
"url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/33VBUY73AA6CTTYL3LRWHNFDULV7PFPN"
},
{
"type": "WEB",
"url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/52N5XS73Z5S4ZN7I7R56ICCPCTKCUV4H"
},
{
"type": "WEB",
"url": "https://www.exploit-db.com/download/47655"
}
],
"schema_version": "1.7.3",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
},
{
"score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N",
"type": "CVSS_V4"
}
],
"summary": "Deserialization of Untrusted Data in PyYAML",
"upstream": [
"GHSA-3pqx-4fqf-j49f",
"CVE-2019-20477",
"PYSEC-2020-176"
]
}
BREW-APPRISE-CVE-2019-20477 (GHSA-3PQX-4FQF-J49F)
Vulnerability from osv_homebrew – Published: 2026-08-13 16:35 – Updated: 2026-09-09 23:41 – Source website
VLAI
Summary
Deserialization of Untrusted Data in PyYAML
Details
PyYAML 5.1 through 5.1.2 has insufficient restrictions on the load and load_all functions because of a class deserialization issue, e.g., Popen is a class in the subprocess module. NOTE: this issue exists because of an incomplete fix for CVE-2017-18342.
Severity
9.8 (Critical)
References
| URL | Type | |||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
||||||||||||||||||||||||||
{
"affected": [
{
"ecosystem_specific": {
"fix": "bump",
"range_state": "fixed",
"resource": "pyyaml",
"resource_purl": "pkg:pypi/pyyaml@6.0.3",
"upstream_fixed_in": "5.2"
},
"package": {
"ecosystem": "Homebrew",
"name": "apprise",
"purl": "pkg:brew/apprise"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "1.12.0"
}
],
"type": "ECOSYSTEM"
}
]
}
],
"database_specific": {
"confidence": "high",
"source": "matched",
"strategy": "registry",
"upstream_evidence": [
{
"ecosystem": "PyPI",
"key": "pkg:pypi/pyyaml@6.0.3",
"name": "pyyaml",
"resource": "pyyaml",
"strategy": "registry",
"subject_version": "6.0.3"
}
]
},
"details": "PyYAML 5.1 through 5.1.2 has insufficient restrictions on the load and load_all functions because of a class deserialization issue, e.g., Popen is a class in the subprocess module. NOTE: this issue exists because of an incomplete fix for CVE-2017-18342.",
"id": "BREW-apprise-CVE-2019-20477",
"modified": "2026-09-09T23:41:52Z",
"published": "2026-08-13T16:35:55Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2019-20477"
},
{
"type": "ADVISORY",
"url": "https://github.com/advisories/GHSA-3pqx-4fqf-j49f"
},
{
"type": "WEB",
"url": "https://github.com/pypa/advisory-database/tree/main/vulns/pyyaml/PYSEC-2020-176.yaml"
},
{
"type": "PACKAGE",
"url": "https://github.com/yaml/pyyaml"
},
{
"type": "WEB",
"url": "https://github.com/yaml/pyyaml/blob/master/CHANGES"
},
{
"type": "WEB",
"url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/33VBUY73AA6CTTYL3LRWHNFDULV7PFPN"
},
{
"type": "WEB",
"url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/52N5XS73Z5S4ZN7I7R56ICCPCTKCUV4H"
},
{
"type": "WEB",
"url": "https://www.exploit-db.com/download/47655"
}
],
"schema_version": "1.7.3",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
},
{
"score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N",
"type": "CVSS_V4"
}
],
"summary": "Deserialization of Untrusted Data in PyYAML",
"upstream": [
"GHSA-3pqx-4fqf-j49f",
"CVE-2019-20477",
"PYSEC-2020-176"
]
}
BREW-ARCHGW-CVE-2019-20477 (GHSA-3PQX-4FQF-J49F)
Vulnerability from osv_homebrew – Published: 2026-08-13 16:36 – Updated: 2026-09-09 23:41 – Source website
VLAI
Summary
Deserialization of Untrusted Data in PyYAML
Details
PyYAML 5.1 through 5.1.2 has insufficient restrictions on the load and load_all functions because of a class deserialization issue, e.g., Popen is a class in the subprocess module. NOTE: this issue exists because of an incomplete fix for CVE-2017-18342.
Severity
9.8 (Critical)
References
| URL | Type | |||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
||||||||||||||||||||||||||
{
"affected": [
{
"ecosystem_specific": {
"fix": "bump",
"range_state": "fixed",
"resource": "pyyaml",
"resource_purl": "pkg:pypi/pyyaml@6.0.3",
"upstream_fixed_in": "5.2"
},
"package": {
"ecosystem": "Homebrew",
"name": "archgw",
"purl": "pkg:brew/archgw"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "0.3.22_4"
}
],
"type": "ECOSYSTEM"
}
]
}
],
"database_specific": {
"confidence": "high",
"source": "matched",
"strategy": "registry",
"upstream_evidence": [
{
"ecosystem": "PyPI",
"key": "pkg:pypi/pyyaml@6.0.3",
"name": "pyyaml",
"resource": "pyyaml",
"strategy": "registry",
"subject_version": "6.0.3"
}
]
},
"details": "PyYAML 5.1 through 5.1.2 has insufficient restrictions on the load and load_all functions because of a class deserialization issue, e.g., Popen is a class in the subprocess module. NOTE: this issue exists because of an incomplete fix for CVE-2017-18342.",
"id": "BREW-archgw-CVE-2019-20477",
"modified": "2026-09-09T23:41:59Z",
"published": "2026-08-13T16:36:04Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2019-20477"
},
{
"type": "ADVISORY",
"url": "https://github.com/advisories/GHSA-3pqx-4fqf-j49f"
},
{
"type": "WEB",
"url": "https://github.com/pypa/advisory-database/tree/main/vulns/pyyaml/PYSEC-2020-176.yaml"
},
{
"type": "PACKAGE",
"url": "https://github.com/yaml/pyyaml"
},
{
"type": "WEB",
"url": "https://github.com/yaml/pyyaml/blob/master/CHANGES"
},
{
"type": "WEB",
"url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/33VBUY73AA6CTTYL3LRWHNFDULV7PFPN"
},
{
"type": "WEB",
"url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/52N5XS73Z5S4ZN7I7R56ICCPCTKCUV4H"
},
{
"type": "WEB",
"url": "https://www.exploit-db.com/download/47655"
}
],
"schema_version": "1.7.3",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
},
{
"score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N",
"type": "CVSS_V4"
}
],
"summary": "Deserialization of Untrusted Data in PyYAML",
"upstream": [
"GHSA-3pqx-4fqf-j49f",
"CVE-2019-20477",
"PYSEC-2020-176"
]
}
BREW-ARXIV_LATEX_CLEANER… (GHSA-3PQX-4FQF-J49F)
Vulnerability from osv_homebrew – Published: 2026-08-13 16:36 – Updated: 2026-09-09 23:42 – Source website
VLAI
Summary
Deserialization of Untrusted Data in PyYAML
Details
PyYAML 5.1 through 5.1.2 has insufficient restrictions on the load and load_all functions because of a class deserialization issue, e.g., Popen is a class in the subprocess module. NOTE: this issue exists because of an incomplete fix for CVE-2017-18342.
Severity
9.8 (Critical)
References
| URL | Type | |||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
||||||||||||||||||||||||||
{
"affected": [
{
"ecosystem_specific": {
"fix": "bump",
"range_state": "fixed",
"resource": "pyyaml",
"resource_purl": "pkg:pypi/pyyaml@6.0.3",
"upstream_fixed_in": "5.2"
},
"package": {
"ecosystem": "Homebrew",
"name": "arxiv_latex_cleaner",
"purl": "pkg:brew/arxiv_latex_cleaner"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "1.0.11"
}
],
"type": "ECOSYSTEM"
}
]
}
],
"database_specific": {
"confidence": "high",
"source": "matched",
"strategy": "registry",
"upstream_evidence": [
{
"ecosystem": "PyPI",
"key": "pkg:pypi/pyyaml@6.0.3",
"name": "pyyaml",
"resource": "pyyaml",
"strategy": "registry",
"subject_version": "6.0.3"
}
]
},
"details": "PyYAML 5.1 through 5.1.2 has insufficient restrictions on the load and load_all functions because of a class deserialization issue, e.g., Popen is a class in the subprocess module. NOTE: this issue exists because of an incomplete fix for CVE-2017-18342.",
"id": "BREW-arxiv_latex_cleaner-CVE-2019-20477",
"modified": "2026-09-09T23:42:01Z",
"published": "2026-08-13T16:36:07Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2019-20477"
},
{
"type": "ADVISORY",
"url": "https://github.com/advisories/GHSA-3pqx-4fqf-j49f"
},
{
"type": "WEB",
"url": "https://github.com/pypa/advisory-database/tree/main/vulns/pyyaml/PYSEC-2020-176.yaml"
},
{
"type": "PACKAGE",
"url": "https://github.com/yaml/pyyaml"
},
{
"type": "WEB",
"url": "https://github.com/yaml/pyyaml/blob/master/CHANGES"
},
{
"type": "WEB",
"url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/33VBUY73AA6CTTYL3LRWHNFDULV7PFPN"
},
{
"type": "WEB",
"url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/52N5XS73Z5S4ZN7I7R56ICCPCTKCUV4H"
},
{
"type": "WEB",
"url": "https://www.exploit-db.com/download/47655"
}
],
"schema_version": "1.7.3",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
},
{
"score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N",
"type": "CVSS_V4"
}
],
"summary": "Deserialization of Untrusted Data in PyYAML",
"upstream": [
"GHSA-3pqx-4fqf-j49f",
"CVE-2019-20477",
"PYSEC-2020-176"
]
}
BREW-AWS-ELASTICBEANSTAL… (GHSA-3PQX-4FQF-J49F)
Vulnerability from osv_homebrew – Published: 2026-08-13 16:37 – Updated: 2026-09-10 18:54 – Source website
VLAI
Summary
Deserialization of Untrusted Data in PyYAML
Details
PyYAML 5.1 through 5.1.2 has insufficient restrictions on the load and load_all functions because of a class deserialization issue, e.g., Popen is a class in the subprocess module. NOTE: this issue exists because of an incomplete fix for CVE-2017-18342.
Severity
9.8 (Critical)
References
| URL | Type | |||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
||||||||||||||||||||||||||
{
"affected": [
{
"ecosystem_specific": {
"fix": "bump",
"range_state": "fixed",
"resource": "pyyaml",
"resource_purl": "pkg:pypi/pyyaml@6.0.3",
"upstream_fixed_in": "5.2"
},
"package": {
"ecosystem": "Homebrew",
"name": "aws-elasticbeanstalk",
"purl": "pkg:brew/aws-elasticbeanstalk"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "3.27.3_1"
}
],
"type": "ECOSYSTEM"
}
]
}
],
"database_specific": {
"confidence": "high",
"source": "matched",
"strategy": "registry",
"upstream_evidence": [
{
"ecosystem": "PyPI",
"key": "pkg:pypi/pyyaml@6.0.3",
"name": "pyyaml",
"resource": "pyyaml",
"strategy": "registry",
"subject_version": "6.0.3"
}
]
},
"details": "PyYAML 5.1 through 5.1.2 has insufficient restrictions on the load and load_all functions because of a class deserialization issue, e.g., Popen is a class in the subprocess module. NOTE: this issue exists because of an incomplete fix for CVE-2017-18342.",
"id": "BREW-aws-elasticbeanstalk-CVE-2019-20477",
"modified": "2026-09-10T18:54:04Z",
"published": "2026-08-13T16:37:01Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2019-20477"
},
{
"type": "ADVISORY",
"url": "https://github.com/advisories/GHSA-3pqx-4fqf-j49f"
},
{
"type": "WEB",
"url": "https://github.com/pypa/advisory-database/tree/main/vulns/pyyaml/PYSEC-2020-176.yaml"
},
{
"type": "PACKAGE",
"url": "https://github.com/yaml/pyyaml"
},
{
"type": "WEB",
"url": "https://github.com/yaml/pyyaml/blob/master/CHANGES"
},
{
"type": "WEB",
"url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/33VBUY73AA6CTTYL3LRWHNFDULV7PFPN"
},
{
"type": "WEB",
"url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/52N5XS73Z5S4ZN7I7R56ICCPCTKCUV4H"
},
{
"type": "WEB",
"url": "https://www.exploit-db.com/download/47655"
}
],
"schema_version": "1.7.3",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
},
{
"score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N",
"type": "CVSS_V4"
}
],
"summary": "Deserialization of Untrusted Data in PyYAML",
"upstream": [
"GHSA-3pqx-4fqf-j49f",
"CVE-2019-20477",
"PYSEC-2020-176"
]
}
BREW-AWS-SAM-CLI-CVE-201… (GHSA-3PQX-4FQF-J49F)
Vulnerability from osv_homebrew – Published: 2026-08-13 16:37 – Updated: 2026-09-10 18:54 – Source website
VLAI
Summary
Deserialization of Untrusted Data in PyYAML
Details
PyYAML 5.1 through 5.1.2 has insufficient restrictions on the load and load_all functions because of a class deserialization issue, e.g., Popen is a class in the subprocess module. NOTE: this issue exists because of an incomplete fix for CVE-2017-18342.
Severity
9.8 (Critical)
References
| URL | Type | |||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
||||||||||||||||||||||||||
{
"affected": [
{
"ecosystem_specific": {
"fix": "bump",
"range_state": "fixed",
"resource": "pyyaml",
"resource_purl": "pkg:pypi/pyyaml@6.0.3",
"upstream_fixed_in": "5.2"
},
"package": {
"ecosystem": "Homebrew",
"name": "aws-sam-cli",
"purl": "pkg:brew/aws-sam-cli"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "1.165.0"
}
],
"type": "ECOSYSTEM"
}
]
}
],
"database_specific": {
"confidence": "high",
"source": "matched",
"strategy": "registry",
"upstream_evidence": [
{
"ecosystem": "PyPI",
"key": "pkg:pypi/pyyaml@6.0.3",
"name": "pyyaml",
"resource": "pyyaml",
"strategy": "registry",
"subject_version": "6.0.3"
}
]
},
"details": "PyYAML 5.1 through 5.1.2 has insufficient restrictions on the load and load_all functions because of a class deserialization issue, e.g., Popen is a class in the subprocess module. NOTE: this issue exists because of an incomplete fix for CVE-2017-18342.",
"id": "BREW-aws-sam-cli-CVE-2019-20477",
"modified": "2026-09-10T18:54:05Z",
"published": "2026-08-13T16:37:01Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2019-20477"
},
{
"type": "ADVISORY",
"url": "https://github.com/advisories/GHSA-3pqx-4fqf-j49f"
},
{
"type": "WEB",
"url": "https://github.com/pypa/advisory-database/tree/main/vulns/pyyaml/PYSEC-2020-176.yaml"
},
{
"type": "PACKAGE",
"url": "https://github.com/yaml/pyyaml"
},
{
"type": "WEB",
"url": "https://github.com/yaml/pyyaml/blob/master/CHANGES"
},
{
"type": "WEB",
"url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/33VBUY73AA6CTTYL3LRWHNFDULV7PFPN"
},
{
"type": "WEB",
"url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/52N5XS73Z5S4ZN7I7R56ICCPCTKCUV4H"
},
{
"type": "WEB",
"url": "https://www.exploit-db.com/download/47655"
}
],
"schema_version": "1.7.3",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
},
{
"score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N",
"type": "CVSS_V4"
}
],
"summary": "Deserialization of Untrusted Data in PyYAML",
"upstream": [
"GHSA-3pqx-4fqf-j49f",
"CVE-2019-20477",
"PYSEC-2020-176"
]
}
BREW-AWS-SHELL-CVE-2019-20477 (GHSA-3PQX-4FQF-J49F)
Vulnerability from osv_homebrew – Published: 2026-08-13 16:37 – Updated: 2026-09-09 23:42 – Source website
VLAI
Summary
Deserialization of Untrusted Data in PyYAML
Details
PyYAML 5.1 through 5.1.2 has insufficient restrictions on the load and load_all functions because of a class deserialization issue, e.g., Popen is a class in the subprocess module. NOTE: this issue exists because of an incomplete fix for CVE-2017-18342.
Severity
9.8 (Critical)
References
| URL | Type | |||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
||||||||||||||||||||||||||
{
"affected": [
{
"ecosystem_specific": {
"fix": "bump",
"range_state": "fixed",
"resource": "pyyaml",
"resource_purl": "pkg:pypi/pyyaml@6.0.3",
"upstream_fixed_in": "5.2"
},
"package": {
"ecosystem": "Homebrew",
"name": "aws-shell",
"purl": "pkg:brew/aws-shell"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "0.2.2_15"
}
],
"type": "ECOSYSTEM"
}
]
}
],
"database_specific": {
"confidence": "high",
"source": "matched",
"strategy": "registry",
"upstream_evidence": [
{
"ecosystem": "PyPI",
"key": "pkg:pypi/pyyaml@6.0.3",
"name": "pyyaml",
"resource": "pyyaml",
"strategy": "registry",
"subject_version": "6.0.3"
}
]
},
"details": "PyYAML 5.1 through 5.1.2 has insufficient restrictions on the load and load_all functions because of a class deserialization issue, e.g., Popen is a class in the subprocess module. NOTE: this issue exists because of an incomplete fix for CVE-2017-18342.",
"id": "BREW-aws-shell-CVE-2019-20477",
"modified": "2026-09-09T23:42:43Z",
"published": "2026-08-13T16:37:01Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2019-20477"
},
{
"type": "ADVISORY",
"url": "https://github.com/advisories/GHSA-3pqx-4fqf-j49f"
},
{
"type": "WEB",
"url": "https://github.com/pypa/advisory-database/tree/main/vulns/pyyaml/PYSEC-2020-176.yaml"
},
{
"type": "PACKAGE",
"url": "https://github.com/yaml/pyyaml"
},
{
"type": "WEB",
"url": "https://github.com/yaml/pyyaml/blob/master/CHANGES"
},
{
"type": "WEB",
"url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/33VBUY73AA6CTTYL3LRWHNFDULV7PFPN"
},
{
"type": "WEB",
"url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/52N5XS73Z5S4ZN7I7R56ICCPCTKCUV4H"
},
{
"type": "WEB",
"url": "https://www.exploit-db.com/download/47655"
}
],
"schema_version": "1.7.3",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
},
{
"score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N",
"type": "CVSS_V4"
}
],
"summary": "Deserialization of Untrusted Data in PyYAML",
"upstream": [
"GHSA-3pqx-4fqf-j49f",
"CVE-2019-20477",
"PYSEC-2020-176"
]
}
BREW-AWS-SSO-UTIL-CVE-20… (GHSA-3PQX-4FQF-J49F)
Vulnerability from osv_homebrew – Published: 2026-08-13 16:37 – Updated: 2026-09-10 18:54 – Source website
VLAI
Summary
Deserialization of Untrusted Data in PyYAML
Details
PyYAML 5.1 through 5.1.2 has insufficient restrictions on the load and load_all functions because of a class deserialization issue, e.g., Popen is a class in the subprocess module. NOTE: this issue exists because of an incomplete fix for CVE-2017-18342.
Severity
9.8 (Critical)
References
| URL | Type | |||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
||||||||||||||||||||||||||
{
"affected": [
{
"ecosystem_specific": {
"fix": "bump",
"range_state": "fixed",
"resource": "pyyaml",
"resource_purl": "pkg:pypi/pyyaml@6.0.3",
"upstream_fixed_in": "5.2"
},
"package": {
"ecosystem": "Homebrew",
"name": "aws-sso-util",
"purl": "pkg:brew/aws-sso-util"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "4.33.0_8"
}
],
"type": "ECOSYSTEM"
}
]
}
],
"database_specific": {
"confidence": "high",
"source": "matched",
"strategy": "registry",
"upstream_evidence": [
{
"ecosystem": "PyPI",
"key": "pkg:pypi/pyyaml@6.0.3",
"name": "pyyaml",
"resource": "pyyaml",
"strategy": "registry",
"subject_version": "6.0.3"
}
]
},
"details": "PyYAML 5.1 through 5.1.2 has insufficient restrictions on the load and load_all functions because of a class deserialization issue, e.g., Popen is a class in the subprocess module. NOTE: this issue exists because of an incomplete fix for CVE-2017-18342.",
"id": "BREW-aws-sso-util-CVE-2019-20477",
"modified": "2026-09-10T18:54:05Z",
"published": "2026-08-13T16:37:01Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2019-20477"
},
{
"type": "ADVISORY",
"url": "https://github.com/advisories/GHSA-3pqx-4fqf-j49f"
},
{
"type": "WEB",
"url": "https://github.com/pypa/advisory-database/tree/main/vulns/pyyaml/PYSEC-2020-176.yaml"
},
{
"type": "PACKAGE",
"url": "https://github.com/yaml/pyyaml"
},
{
"type": "WEB",
"url": "https://github.com/yaml/pyyaml/blob/master/CHANGES"
},
{
"type": "WEB",
"url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/33VBUY73AA6CTTYL3LRWHNFDULV7PFPN"
},
{
"type": "WEB",
"url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/52N5XS73Z5S4ZN7I7R56ICCPCTKCUV4H"
},
{
"type": "WEB",
"url": "https://www.exploit-db.com/download/47655"
}
],
"schema_version": "1.7.3",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
},
{
"score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N",
"type": "CVSS_V4"
}
],
"summary": "Deserialization of Untrusted Data in PyYAML",
"upstream": [
"GHSA-3pqx-4fqf-j49f",
"CVE-2019-20477",
"PYSEC-2020-176"
]
}
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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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