{"schema_version":1,"title":"pyopenssl (PyPI) vulnerabilities","summary":"Junglewise Threat Intelligence has tracked 5 vulnerabilities in pyopenssl (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-2026-27459, was published on 18 March 2026.","url":"https://junglewise.ai/threats/technologies/pypi-pyopenssl","json_url":"https://junglewise.ai/threats/technologies/pypi-pyopenssl.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/pypi-pyopenssl","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":2},"latest":[{"cve":"CVE-2026-27459","cvss":9.8,"epss":0.0088,"slug":"cve-2026-27459-pyopenssl-buffer-overflow-in-dtls-cookie-generation-callback","title":"pyOpenSSL buffer overflow in DTLS cookie generation callback","severity":"critical","exploited":false,"published_at":"2026-03-18T00:16:19.273+00:00","url":"https://junglewise.ai/threats/cve-2026-27459-pyopenssl-buffer-overflow-in-dtls-cookie-generation-callback"},{"cve":"CVE-2026-27448","cvss":4,"epss":0.0039,"slug":"cve-2026-27448-pyopenssl-allows-tls-connection-bypass-via-unhandled-callback","title":"PYSEC-2026-2268 - pyOpenSSL is a Python wrapper around the OpenSSL library. Starting in version 0.14.0 and prior to version 26.0.0, if a user provided callbac","severity":"medium","exploited":false,"published_at":"2026-03-18T00:16:19.107+00:00","url":"https://junglewise.ai/threats/cve-2026-27448-pyopenssl-allows-tls-connection-bypass-via-unhandled-callback"},{"cve":"CVE-2018-1000807","cvss":3.1,"epss":0.0408,"slug":"cve-2018-1000807-pyopenssl-use-after-free-vulnerability","title":"PYSEC-2018-23 - Python Cryptographic Authority pyopenssl version prior to version 17.5.0 contains a CWE-416: Use After Free vulnerability in X509 object han","severity":"low","exploited":false,"published_at":"2018-10-08T15:29:00+00:00","url":"https://junglewise.ai/threats/cve-2018-1000807-pyopenssl-use-after-free-vulnerability"},{"cve":"CVE-2018-1000808","cvss":3,"epss":0.019,"slug":"cve-2018-1000808-pyopenssl-incorrect-memory-management-in-pkcs-12-handling","title":"PYSEC-2018-24 - Python Cryptographic Authority pyopenssl version Before 17.5.0 contains a CWE - 401 : Failure to Release Memory Before Removing Last Referen","severity":"low","exploited":false,"published_at":"2018-10-08T15:29:00+00:00","url":"https://junglewise.ai/threats/cve-2018-1000808-pyopenssl-incorrect-memory-management-in-pkcs-12-handling"},{"cve":"CVE-2013-4314","cvss":3.1,"epss":0.012,"slug":"cve-2013-4314-pyopenssl-mishandles-nul-byte-in-certificate-subject-alternative","title":"PYSEC-2013-31 - The X509Extension in pyOpenSSL before 0.13.1 does not properly handle a '\\0' character in a domain name in the Subject Alternative Name fiel","severity":"low","exploited":false,"published_at":"2013-09-30T21:55:00+00:00","url":"https://junglewise.ai/threats/cve-2013-4314-pyopenssl-mishandles-nul-byte-in-certificate-subject-alternative"}],"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":"pyopenssl (PyPI)","slug":"pypi-pyopenssl","vendor":{"name":"PyPI","slug":"pypi","url":"https://junglewise.ai/threats/vendors/pypi"},"aliases":[],"description":"Python wrapper for OpenSSL library providing SSL/TLS functionality.","url":"https://junglewise.ai/threats/technologies/pypi-pyopenssl"},"most_severe":[{"cve":"CVE-2026-27459","cvss":9.8,"epss":0.0088,"slug":"cve-2026-27459-pyopenssl-buffer-overflow-in-dtls-cookie-generation-callback","title":"pyOpenSSL buffer overflow in DTLS cookie generation callback","severity":"critical","exploited":false,"published_at":"2026-03-18T00:16:19.273+00:00","url":"https://junglewise.ai/threats/cve-2026-27459-pyopenssl-buffer-overflow-in-dtls-cookie-generation-callback"},{"cve":"CVE-2026-27448","cvss":4,"epss":0.0039,"slug":"cve-2026-27448-pyopenssl-allows-tls-connection-bypass-via-unhandled-callback","title":"PYSEC-2026-2268 - pyOpenSSL is a Python wrapper around the OpenSSL library. Starting in version 0.14.0 and prior to version 26.0.0, if a user provided callbac","severity":"medium","exploited":false,"published_at":"2026-03-18T00:16:19.107+00:00","url":"https://junglewise.ai/threats/cve-2026-27448-pyopenssl-allows-tls-connection-bypass-via-unhandled-callback"},{"cve":"CVE-2018-1000807","cvss":3.1,"epss":0.0408,"slug":"cve-2018-1000807-pyopenssl-use-after-free-vulnerability","title":"PYSEC-2018-23 - Python Cryptographic Authority pyopenssl version prior to version 17.5.0 contains a CWE-416: Use After Free vulnerability in X509 object han","severity":"low","exploited":false,"published_at":"2018-10-08T15:29:00+00:00","url":"https://junglewise.ai/threats/cve-2018-1000807-pyopenssl-use-after-free-vulnerability"},{"cve":"CVE-2013-4314","cvss":3.1,"epss":0.012,"slug":"cve-2013-4314-pyopenssl-mishandles-nul-byte-in-certificate-subject-alternative","title":"PYSEC-2013-31 - The X509Extension in pyOpenSSL before 0.13.1 does not properly handle a '\\0' character in a domain name in the Subject Alternative Name fiel","severity":"low","exploited":false,"published_at":"2013-09-30T21:55:00+00:00","url":"https://junglewise.ai/threats/cve-2013-4314-pyopenssl-mishandles-nul-byte-in-certificate-subject-alternative"},{"cve":"CVE-2018-1000808","cvss":3,"epss":0.019,"slug":"cve-2018-1000808-pyopenssl-incorrect-memory-management-in-pkcs-12-handling","title":"PYSEC-2018-24 - Python Cryptographic Authority pyopenssl version Before 17.5.0 contains a CWE - 401 : Failure to Release Memory Before Removing Last Referen","severity":"low","exploited":false,"published_at":"2018-10-08T15:29:00+00:00","url":"https://junglewise.ai/threats/cve-2018-1000808-pyopenssl-incorrect-memory-management-in-pkcs-12-handling"}],"generated_at":"2026-09-28T03:07:00.154823+00:00"}