{"id":"CVE-2026-9758","aliases":["EUVD-2026-36003","GHSA-q89f-427x-5p67"],"status":"published","title":"Improper Certificate Validation in S2OPC","description":"Improper comparison with the certificates trusted list in S2OPC allows an attacker well-formed untrusted certificate to be considered trusted","severity":{"version":"3.1","score":7.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-08","score":0.00119,"percentile":0.01771,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-295"],"published":"2026-06-10T12:32:39Z","modified":"2026-10-26T11:10:00Z","products":[{"vendor":"systerel","product":"s2opc"}],"references":[{"url":"https://gitlab.com/systerel/S2OPC/-/work_items/1770"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-9758"},{"url":"https://github.com/advisories/GHSA-q89f-427x-5p67"}],"sources":{"cve":[{"id":"CVE-2026-9758","title":"Improper Certificate Validation in S2OPC","description":"Improper comparison with the certificates trusted list in S2OPC allows an attacker well-formed untrusted certificate to be considered trusted","status":"published","published":"2026-06-10T12:32:39.183Z","modified":"2026-06-10T13:54:59.235Z","cvss":[{"version":"3.1","score":7.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L","level":"high","assessor":"cna"}],"cwes":["CWE-295"],"updated_at":"2026-11-02T13:42:37.965383Z"}],"euvd":[{"id":"EUVD-2026-36003","description":"Improper comparison with the certificates trusted list in S2OPC allows an attacker well-formed untrusted certificate to be considered trusted","status":"published","published":"2026-06-10T12:32:39Z","modified":"2026-06-10T13:54:59Z","cvss":[{"version":"3.1","score":7.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L","level":"high"}],"updated_at":"2026-11-02T18:20:45.405546Z"}],"ghsa":[{"id":"GHSA-q89f-427x-5p67","title":"Improper comparison with the certificates trusted list in S2OPC allows an attacker well-formed...","description":"Improper comparison with the certificates trusted list in S2OPC allows an attacker well-formed untrusted certificate to be considered trusted","status":"published","published":"2026-06-10T15:31:32Z","modified":"2026-06-10T15:31:51Z","cvss":[{"version":"3.1","score":7.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L","level":"high"}],"cwes":["CWE-295"],"updated_at":"2026-11-02T15:08:43.963781Z"}],"nvd":[{"id":"CVE-2026-9758","description":"Improper comparison with the certificates trusted list in S2OPC allows an attacker well-formed untrusted certificate to be considered trusted","status":"published","published":"2026-06-10T14:16:37.767Z","modified":"2026-10-26T11:10:00.157Z","cvss":[{"version":"3.1","score":7.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L","level":"high","assessor":"secondary"}],"cwes":["CWE-295"],"updated_at":"2026-11-02T14:12:23.485267Z"}]}}