{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-18257", "assignerOrgId": "ceab7361-8a18-47b1-92ba-4d7d25f6715a", "state": "PUBLISHED", "assignerShortName": "GitLab", "dateReserved": "2026-07-29T16:33:59.899Z", "datePublished": "2026-07-29T16:34:09.688Z", "dateUpdated": "2026-07-29T16:34:09.688Z"}, "containers": {"cna": {"title": "Improper Certificate Validation in S2OPC", "descriptions": [{"lang": "en", "value": "Improper validity period check for root issuer certificate in CycloneCrypto cryptographic wrapper of S2OPC allows a certificate issued by this root issuer to be considered trusted"}], "affected": [{"vendor": "Systerel", "product": "S2OPC", "versions": [{"version": "1.5.0", "status": "affected", "lessThan": "2.0.0", "versionType": "semver"}], "defaultStatus": "unaffected"}], "problemTypes": [{"descriptions": [{"lang": "en", "description": "CWE-295: Improper Certificate Validation", "cweId": "CWE-295", "type": "CWE"}]}], "references": [{"url": "https://gitlab.com/systerel/S2OPC/-/work_items/1804"}], "metrics": [{"format": "CVSS", "scenarios": [{"lang": "en", "value": "GENERAL"}], "cvssV3_1": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L", "attackVector": "NETWORK", "attackComplexity": "HIGH", "privilegesRequired": "NONE", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "LOW", "integrityImpact": "LOW", "availabilityImpact": "LOW", "baseScore": 5.6, "baseSeverity": "MEDIUM"}}], "solutions": [{"lang": "en", "value": "Use mbedtls cryptographic wrapper of S2OPC. Or upgrade S2OPC to use CycloneCrypto wrapper of release version >= 2.0.0 or master commit >= 839ae878"}], "credits": [{"lang": "en", "value": "Systerel", "type": "finder"}], "providerMetadata": {"orgId": "ceab7361-8a18-47b1-92ba-4d7d25f6715a", "shortName": "GitLab", "dateUpdated": "2026-07-29T16:34:09.688Z"}}}}

{}

{}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[1.5.0,2.0.0)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "S2OPC", "source": "cna", "vendor": "Systerel"}, "product": "s2opc", "vendor": "systerel"}], "created": "2026-07-29T17:30:04.078495+00:00", "updated": "2026-07-29T17:30:04.078538+00:00", "vendors": ["systerel", "systerel$PRODUCT$s2opc"]}