{"cve":"CVE-2018-1000807","nvd":{"published":"2018-10-08T15:29:00.837","modified":"2026-06-17T01:33:05.207","status":"Modified","description":"Python Cryptographic Authority pyopenssl version prior to version 17.5.0 contains a CWE-416: Use After Free vulnerability in X509 object handling that can result in Use after free can lead to possible denial of service or remote code execution.. This attack appear to be exploitable via Depends on the calling application and if it retains a reference to the memory.. This vulnerability appears to have been fixed in 17.5.0.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H","score":8.1},"cwes":["CWE-416"],"references":["http://lists.opensuse.org/opensuse-security-announce/2019-04/msg00014.html","https://access.redhat.com/errata/RHSA-2019:0085","https://github.com/pyca/pyopenssl/commit/e73818600065821d588af475b024f4eb518c3509","https://github.com/pyca/pyopenssl/pull/723","https://usn.ubuntu.com/3813-1/"],"products":["canonical:ubuntu_linux","pyopenssl:pyopenssl","redhat:enterprise_linux_desktop","redhat:enterprise_linux_server","redhat:enterprise_linux_workstation","redhat:openstack"],"source":"nvd","synced_at":"2026-10-19T20:53:14.491561039+00:00"},"epss":{"cve":"CVE-2018-1000807","score":0.04075,"percentile":0.90696,"date":"2026-11-01"},"kev":null,"osv":[{"id":"GHSA-p28m-34f6-967q","url":"https://osv.dev/vulnerability/GHSA-p28m-34f6-967q","summary":"PyOpenSSL Use-After-Free vulnerability","modified":"2024-10-15T16:39:23.634847Z","packages":[{"ecosystem":"PyPI","name":"pyopenssl","purl":"pkg:pypi/pyopenssl","ranges":["<17.5.0"],"fixed":["17.5.0"]}]},{"id":"PYSEC-2018-23","url":"https://osv.dev/vulnerability/PYSEC-2018-23","summary":"","modified":"2023-11-08T03:59:40.132715Z","packages":[{"ecosystem":"PyPI","name":"pyopenssl","purl":"pkg:pypi/pyopenssl","ranges":["<17.5.0"],"fixed":["17.5.0"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}