{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-42767", "assignerOrgId": "3a12439a-ef3a-4c79-92e6-6081a721f1e5", "state": "PUBLISHED", "assignerShortName": "openssl", "dateReserved": "2026-04-29T09:22:27.968Z", "datePublished": "2026-06-09T16:03:27.435Z", "dateUpdated": "2026-06-10T07:48:03.405Z"}, "containers": {"cna": {"affected": [{"defaultStatus": "unaffected", "product": "OpenSSL", "vendor": "OpenSSL", "versions": [{"lessThan": "4.0.1", "status": "affected", "version": "4.0.0", "versionType": "semver"}, {"lessThan": "3.6.3", "status": "affected", "version": "3.6.0", "versionType": "semver"}, {"lessThan": "3.5.7", "status": "affected", "version": "3.5.0", "versionType": "semver"}, {"lessThan": "3.4.6", "status": "affected", "version": "3.4.0", "versionType": "semver"}, {"lessThan": "3.0.21", "status": "affected", "version": "3.0.0", "versionType": "semver"}]}], "credits": [{"lang": "en", "type": "reporter", "value": "Zhanpeng Liu (Tencent Xuanwu Lab)"}, {"lang": "en", "type": "reporter", "value": "Guannan Wang (Tencent Xuanwu Lab)"}, {"lang": "en", "type": "reporter", "value": "Guancheng Li (Tencent Xuanwu Lab)"}, {"lang": "en", "type": "reporter", "value": "Bhabani Sankar Das"}, {"lang": "en", "type": "remediation developer", "value": "Igor Ustinov"}, {"lang": "en", "type": "remediation developer", "value": "Tom\u00e1\u0161 Mr\u00e1z"}], "datePublic": "2026-06-09T14:00:00.000Z", "descriptions": [{"lang": "en", "supportingMedia": [{"base64": false, "type": "text/html", "value": "Issue summary: An attacker-controlled CMP (Certificate Management Protocol)<br>server could trigger a NULL pointer dereference in a CMP client application.<br><br>Impact summary: A NULL pointer dereference causes a crash of the<br>application and a Denial of Service.<br><br>An attacker controlling a CMP server (or acting as a man-in-the-middle) could<br>craft a CMP response containing a CRMF (Certificate Request Message Format)<br>CertRepMessage with an EncryptedValue structure where the symmAlg field<br>has an algorithm OID but no parameters field. 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