{"schema_version":1,"title":"PyYAML (PyPI) vulnerabilities","summary":"Junglewise Threat Intelligence has tracked 5 vulnerabilities in PyYAML (PyPI): 0 in the last 7 days and 0 in the last 90 days, 1 of them critical and 0 exploited in the wild. The most recent, CVE-2020-14343, was published on 9 February 2021.","url":"https://junglewise.ai/threats/technologies/pyyaml","json_url":"https://junglewise.ai/threats/technologies/pyyaml.json","publisher":"Junglewise Threat Intelligence","license":"CC-BY-4.0","license_url":"https://creativecommons.org/licenses/by/4.0/","attribution":"Junglewise Threat Intelligence, https://junglewise.ai/threats/technologies/pyyaml","sources":"NVD, GitHub Security Advisories, OSV, the CISA Known Exploited Vulnerabilities catalog, FIRST EPSS and vendor advisories","kind":"technology","counts":{"high":0,"all_time":5,"critical":1,"exploited":0,"last_7_days":0,"last_30_days":0,"last_90_days":0,"last_365_days":0},"latest":[{"cve":"CVE-2020-14343","cvss":3.1,"epss":0.0598,"slug":"cve-2020-14343-improper-input-validation-in-pyyaml","title":"PYSEC-2021-142 - A vulnerability was discovered in the PyYAML library in versions before 5.4, where it is susceptible to arbitrary code execution when it pro","severity":"low","exploited":false,"published_at":"2021-02-09T21:15:00+00:00","url":"https://junglewise.ai/threats/cve-2020-14343-improper-input-validation-in-pyyaml"},{"cve":"CVE-2020-1747","cvss":3.1,"epss":0.0544,"slug":"cve-2020-1747-improper-input-validation-in-pyyaml","title":"PYSEC-2020-96 - A vulnerability was discovered in the PyYAML library in versions before 5.3.1, where it is susceptible to arbitrary code execution when it p","severity":"low","exploited":false,"published_at":"2020-03-24T15:15:00+00:00","url":"https://junglewise.ai/threats/cve-2020-1747-improper-input-validation-in-pyyaml"},{"cve":"CVE-2019-20477","cvss":3.1,"epss":0.0511,"slug":"cve-2019-20477-pyyaml-unsafe-deserialization-in-load-and-load-all","title":"PYSEC-2020-176 - 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., Po","severity":"low","exploited":false,"published_at":"2020-02-19T04:15:00+00:00","url":"https://junglewise.ai/threats/cve-2019-20477-pyyaml-unsafe-deserialization-in-load-and-load-all"},{"slug":"pysec-2020-195-pyyaml-5-1-through-5-1-2-has-insufficient-restrictions-52e85ed8","title":"PYSEC-2020-195 - 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., Po","severity":"info","exploited":false,"published_at":"2020-02-19T04:15:00+00:00","url":"https://junglewise.ai/threats/pysec-2020-195-pyyaml-5-1-through-5-1-2-has-insufficient-restrictions-52e85ed8"},{"cve":"CVE-2017-18342","cvss":9.8,"epss":0.0566,"slug":"cve-2017-18342-pyyaml-insecure-deserialization-in-yaml-load-api","title":"PyYAML insecure deserialization in yaml.load API","severity":"critical","exploited":false,"published_at":"2019-01-04T17:45:26+00:00","url":"https://junglewise.ai/threats/cve-2017-18342-pyyaml-insecure-deserialization-in-yaml-load-api"}],"weekly":[{"week":"2026-07-06","critical":0,"exploited":0,"vulnerabilities":0},{"week":"2026-07-13","critical":0,"exploited":0,"vulnerabilities":0},{"week":"2026-07-20","critical":0,"exploited":0,"vulnerabilities":0},{"week":"2026-07-27","critical":0,"exploited":0,"vulnerabilities":0},{"week":"2026-08-03","critical":0,"exploited":0,"vulnerabilities":0},{"week":"2026-08-10","critical":0,"exploited":0,"vulnerabilities":0},{"week":"2026-08-17","critical":0,"exploited":0,"vulnerabilities":0},{"week":"2026-08-24","critical":0,"exploited":0,"vulnerabilities":0},{"week":"2026-08-31","critical":0,"exploited":0,"vulnerabilities":0},{"week":"2026-09-07","critical":0,"exploited":0,"vulnerabilities":0},{"week":"2026-09-14","critical":0,"exploited":0,"vulnerabilities":0},{"week":"2026-09-21","critical":0,"exploited":0,"vulnerabilities":0},{"week":"2026-09-28","critical":0,"exploited":0,"vulnerabilities":0}],"related":[{"name":"tensorflow (PyPI)","slug":"pypi-tensorflow","vulnerabilities":428,"url":"https://junglewise.ai/threats/technologies/pypi-tensorflow"},{"name":"tensorflow-cpu (PyPI)","slug":"tensorflow-cpu","vulnerabilities":424,"url":"https://junglewise.ai/threats/technologies/tensorflow-cpu"},{"name":"tensorflow-gpu (PyPI)","slug":"tensorflow-gpu","vulnerabilities":421,"url":"https://junglewise.ai/threats/technologies/tensorflow-gpu"},{"name":"open-webui (PyPI)","slug":"open-webui","vulnerabilities":177,"url":"https://junglewise.ai/threats/technologies/open-webui"},{"name":"Django (PyPI)","slug":"django","vulnerabilities":172,"url":"https://junglewise.ai/threats/technologies/django"},{"name":"apache-airflow (PyPI)","slug":"apache-airflow","vulnerabilities":152,"url":"https://junglewise.ai/threats/technologies/apache-airflow"},{"name":"plone (PyPI)","slug":"pypi-plone","vulnerabilities":101,"url":"https://junglewise.ai/threats/technologies/pypi-plone"},{"name":"praisonai (PyPI)","slug":"pypi-praisonai","vulnerabilities":86,"url":"https://junglewise.ai/threats/technologies/pypi-praisonai"},{"name":"exiv2 (PyPI)","slug":"exiv2","vulnerabilities":85,"url":"https://junglewise.ai/threats/technologies/exiv2"},{"name":"nltk (PyPI)","slug":"nltk","vulnerabilities":83,"url":"https://junglewise.ai/threats/technologies/nltk"},{"name":"mlflow (PyPI)","slug":"mlflow","vulnerabilities":82,"url":"https://junglewise.ai/threats/technologies/mlflow"},{"name":"pillow (PyPI)","slug":"pillow","vulnerabilities":79,"url":"https://junglewise.ai/threats/technologies/pillow"}],"technology":{"hub":true,"name":"PyYAML (PyPI)","slug":"pyyaml","vendor":{"name":"PyPI","slug":"pypi","url":"https://junglewise.ai/threats/vendors/pypi"},"aliases":[],"homepage":"https://pyyaml.org/","repo_url":"https://github.com/yaml/pyyaml","description":"A YAML parser and emitter for the Python programming language.","url":"https://junglewise.ai/threats/technologies/pyyaml"},"most_severe":[{"cve":"CVE-2017-18342","cvss":9.8,"epss":0.0566,"slug":"cve-2017-18342-pyyaml-insecure-deserialization-in-yaml-load-api","title":"PyYAML insecure deserialization in yaml.load API","severity":"critical","exploited":false,"published_at":"2019-01-04T17:45:26+00:00","url":"https://junglewise.ai/threats/cve-2017-18342-pyyaml-insecure-deserialization-in-yaml-load-api"},{"cve":"CVE-2020-14343","cvss":3.1,"epss":0.0598,"slug":"cve-2020-14343-improper-input-validation-in-pyyaml","title":"PYSEC-2021-142 - A vulnerability was discovered in the PyYAML library in versions before 5.4, where it is susceptible to arbitrary code execution when it pro","severity":"low","exploited":false,"published_at":"2021-02-09T21:15:00+00:00","url":"https://junglewise.ai/threats/cve-2020-14343-improper-input-validation-in-pyyaml"},{"cve":"CVE-2020-1747","cvss":3.1,"epss":0.0544,"slug":"cve-2020-1747-improper-input-validation-in-pyyaml","title":"PYSEC-2020-96 - A vulnerability was discovered in the PyYAML library in versions before 5.3.1, where it is susceptible to arbitrary code execution when it p","severity":"low","exploited":false,"published_at":"2020-03-24T15:15:00+00:00","url":"https://junglewise.ai/threats/cve-2020-1747-improper-input-validation-in-pyyaml"},{"cve":"CVE-2019-20477","cvss":3.1,"epss":0.0511,"slug":"cve-2019-20477-pyyaml-unsafe-deserialization-in-load-and-load-all","title":"PYSEC-2020-176 - 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., Po","severity":"low","exploited":false,"published_at":"2020-02-19T04:15:00+00:00","url":"https://junglewise.ai/threats/cve-2019-20477-pyyaml-unsafe-deserialization-in-load-and-load-all"},{"slug":"pysec-2020-195-pyyaml-5-1-through-5-1-2-has-insufficient-restrictions-52e85ed8","title":"PYSEC-2020-195 - 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., Po","severity":"info","exploited":false,"published_at":"2020-02-19T04:15:00+00:00","url":"https://junglewise.ai/threats/pysec-2020-195-pyyaml-5-1-through-5-1-2-has-insufficient-restrictions-52e85ed8"}],"generated_at":"2026-09-28T03:07:00.154823+00:00"}