{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2026-18784", "assignerOrgId": "1af790b2-7ee1-4545-860a-a788eba489b5", "state": "PUBLISHED", "assignerShortName": "VulDB", "dateReserved": "2026-08-04T08:29:59.828Z", "datePublished": "2026-08-04T16:30:09.771Z", "dateUpdated": "2026-08-05T14:55:36.315Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "1af790b2-7ee1-4545-860a-a788eba489b5", "shortName": "VulDB", "dateUpdated": "2026-08-04T16:30:09.771Z" }, "title": "o6 open62541 ua_client_highlevel.c UA_Client_readNodeClassAttribute heap-based overflow", "problemTypes": [ { "descriptions": [ { "type": "CWE", "cweId": "CWE-122", "lang": "en", "description": "Heap-based Buffer Overflow" } ] }, { "descriptions": [ { "type": "CWE", "cweId": "CWE-119", "lang": "en", "description": "Memory Corruption" } ] } ], "affected": [ { "vendor": "o6", "product": "open62541", "versions": [ { "version": "1.5.0", "status": "affected" }, { "version": "1.5.1", "status": "affected" }, { "version": "1.5.2", "status": "affected" }, { "version": "1.5.3", "status": "affected" }, { "version": "1.5.4", "status": "affected" }, { "version": "1.5.5", "status": "affected" } ], "cpes": [ "cpe:2.3:a:open62541:open62541:*:*:*:*:*:*:*:*" ] } ], "descriptions": [ { "lang": "en", "value": "A vulnerability was found in o6 open62541 up to 1.5.5. This issue affects the function UA_Client_readNodeClassAttribute of the file src/client/ua_client_highlevel.c. Performing a manipulation results in heap-based buffer overflow. Attacking locally is a requirement. The exploit has been made public and could be used. The project closed the issue report, stating that this is not the official way to report a security vulnerability." } ], "metrics": [ { "cvssV4_0": { "version": "4.0", "baseScore": 4.8, "vectorString": "CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P", "baseSeverity": "MEDIUM" } }, { "cvssV3_1": { "version": "3.1", "baseScore": 5.3, "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L/E:P/RL:X/RC:R", "baseSeverity": "MEDIUM" } }, { "cvssV3_0": { "version": "3.0", "baseScore": 5.3, "vectorString": "CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L/E:P/RL:X/RC:R", "baseSeverity": "MEDIUM" } }, { "cvssV2_0": { "version": "2.0", "baseScore": 4.3, "vectorString": "AV:L/AC:L/Au:S/C:P/I:P/A:P/E:POC/RL:ND/RC:UR" } } ], "timeline": [ { "time": "2026-08-04T00:00:00.000Z", "lang": "en", "value": "Advisory disclosed" }, { "time": "2026-08-04T02:00:00.000Z", "lang": "en", "value": "VulDB entry created" }, { "time": "2026-08-04T10:47:54.000Z", "lang": "en", "value": "VulDB entry last update" } ], "credits": [ { "lang": "en", "value": "Chuan Wei", "type": "finder" }, { "lang": "en", "value": "VULL (VulDB User)", "type": "reporter" }, { "lang": "en", "value": "SCU_1CP (VulDB User)", "type": "analyst" }, { "lang": "en", "value": "VulDB CNA Team", "type": "coordinator" } ], "references": [ { "url": "https://vuldb.com/vuln/385786", "name": "VDB-385786 | o6 open62541 ua_client_highlevel.c UA_Client_readNodeClassAttribute heap-based overflow", "tags": [ "vdb-entry", "technical-description" ] }, { "url": "https://vuldb.com/vuln/385786/cti", "name": "VDB-385786 | CTI Indicators (IOB, IOC, IOA)", "tags": [ "signature", "permissions-required" ] }, { "url": "https://vuldb.com/cve/CVE-2026-18784", "name": "CVE-2026-18784 | CVE Analysis and Report", "tags": [ "third-party-advisory" ] }, { "url": "https://vuldb.com/submit/857012", "name": "Submit #857012 | open62541 Project open62541 master (commit ca356b088ada7dee824d1b4acd07c1ff07ce242b) Heap-based Buffer Overflow (Out-of-Bounds Read)", "tags": [ "third-party-advisory" ] }, { "url": "https://github.com/open62541/open62541/issues/8139", "tags": [ "issue-tracking" ] }, { "url": "https://github.com/gff-cw/information/issues/11", "tags": [ "exploit", "issue-tracking" ] } ], "x_generator": [ "VulDB PVTS v202608" ] }, "adp": [ { "metrics": [ { "other": { "type": "ssvc", "content": { "timestamp": "2026-08-05T14:55:21.806045Z", "id": "CVE-2026-18784", "options": [ { "Exploitation": "poc" }, { "Automatable": "no" }, { "Technical Impact": "partial" } ], "role": "CISA Coordinator", "version": "2.0.3" } } } ], "title": "CISA ADP Vulnrichment", "providerMetadata": { "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-08-05T14:55:36.315Z" } } ] } }