CVE-2026-18785
📛 CVE Title
o6 open62541 client_types_custom.c UA_Client_getRemoteDataTypes use after free
Description
A vulnerability was determined in o6 open62541 ca356b088ada7dee824d1b4acd07c1ff07ce242b. Impacted is the function UA_Client_getRemoteDataTypes of the file examples/custom_datatype/client_types_custom.c. Executing a manipulation can lead to use after free. It is possible to launch the attack on the local host. The exploit has been publicly disclosed and may be utilized. The project closed the issue report, stating that this is not the official way to report a security vulnerability.
Overview
- State
- PUBLISHED
- Assigner (CNA)
- VulDB
- CVSS severity
- MEDIUM
- CVSS score
- 4.8 / 10
- CVSS vector
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- Effective score
- 4.8 / 10 MEDIUM source: CNA overview
- CWE(s)
-
CWE-416,CWE-119 - Reserved
- 2026-08-04
- Published
- 2026-08-04 16:45 UTC
- Last updated
- 2026-08-04 17:35 UTC
- Source
- https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2026/18xxx/CVE-2026-18785.json
Affected products (1)
| Vendor | Product | Versions | Platforms |
|---|---|---|---|
| o6 | open62541 |
ca356b088ada7dee824d1b4acd07c1ff07ce242b (affected)
|
— |
Vendor references (6)
References embedded in the original CVE record by the assigning CNA.
- VDB-385787 | o6 open62541 client_types_custom.c UA_Client_getRemoteDataTypes use after free vdb-entrytechnical-description
- VDB-385787 | CTI Indicators (IOB, IOC, IOA) signaturepermissions-required
- CVE-2026-18785 | CVE Analysis and Report third-party-advisory
- Submit #857052 | open62541 Project open62541 master (commit ca356b088ada7dee824d1b4acd07c1ff07ce242b) Uncontrolled Recursion (Stack Overflow) third-party-advisory
- https://github.com/open62541/open62541/issues/8131 issue-tracking
- https://github.com/gff-cw/information/issues/12 exploitissue-tracking
Web references (0)
DuckDuckGo results ranked by threat-intel / vendor advisory domains. Generated by the 🔎 Find references (web) button above — same flow as the Remediations search.
No web references attached yet.
AI Forensic Analysis
Only Available for Registered Users. Sign in to view.
Raw JSON
The full cvelistV5 record. Download as CVE-2026-18785.json.
{
"containers": {
"adp": [
{
"metrics": [
{
"other": {
"content": {
"id": "CVE-2026-18785",
"options": [
{
"Exploitation": "poc"
},
{
"Automatable": "no"
},
{
"Technical Impact": "partial"
}
],
"role": "CISA Coordinator",
"timestamp": "2026-08-04T17:30:52.782290Z",
"version": "2.0.3"
},
"type": "ssvc"
}
}
],
"providerMetadata": {
"dateUpdated": "2026-08-04T17:35:15.212Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"references": [
{
"tags": [
"exploit"
],
"url": "https://vuldb.com/submit/857052"
},
{
"tags": [
"exploit"
],
"url": "https://github.com/open62541/open62541/issues/8131"
}
],
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
"affected": [
{
"cpes": [
"cpe:2.3:a:open62541:open62541:*:*:*:*:*:*:*:*"
],
"product": "open62541",
"vendor": "o6",
"versions": [
{
"status": "affected",
"version": "ca356b088ada7dee824d1b4acd07c1ff07ce242b"
}
]
}
],
"credits": [
{
"lang": "en",
"type": "finder",
"value": "Chuan Wei (SCU)"
},
{
"lang": "en",
"type": "reporter",
"value": "VULL (VulDB User)"
},
{
"lang": "en",
"type": "analyst",
"value": "SCU_1CP (VulDB User)"
},
{
"lang": "en",
"type": "coordinator",
"value": "VulDB CNA Team"
}
],
"descriptions": [
{
"lang": "en",
"value": "A vulnerability was determined in o6 open62541 ca356b088ada7dee824d1b4acd07c1ff07ce242b. Impacted is the function UA_Client_getRemoteDataTypes of the file examples/custom_datatype/client_types_custom.c. Executing a manipulation can lead to use after free. It is possible to launch the attack on the local host. The exploit has been publicly disclosed and may be utilized. The project closed the issue report, stating that this is not the official way to report a security vulnerability."
}
],
"metrics": [
{
"cvssV4_0": {
"baseScore": 4.8,
"baseSeverity": "MEDIUM",
"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",
"version": "4.0"
}
},
{
"cvssV3_1": {
"baseScore": 5.3,
"baseSeverity": "MEDIUM",
"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",
"version": "3.1"
}
},
{
"cvssV3_0": {
"baseScore": 5.3,
"baseSeverity": "MEDIUM",
"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",
"version": "3.0"
}
},
{
"cvssV2_0": {
"baseScore": 4.3,
"vectorString": "AV:L/AC:L/Au:S/C:P/I:P/A:P/E:POC/RL:ND/RC:UR",
"version": "2.0"
}
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-416",
"description": "Use After Free",
"lang": "en",
"type": "CWE"
}
]
},
{
"descriptions": [
{
"cweId": "CWE-119",
"description": "Memory Corruption",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-08-04T16:45:08.749Z",
"orgId": "1af790b2-7ee1-4545-860a-a788eba489b5",
"shortName": "VulDB"
},
"references": [
{
"name": "VDB-385787 | o6 open62541 client_types_custom.c UA_Client_getRemoteDataTypes use after free",
"tags": [
"vdb-entry",
"technical-description"
],
"url": "https://vuldb.com/vuln/385787"
},
{
"name": "VDB-385787 | CTI Indicators (IOB, IOC, IOA)",
"tags": [
"signature",
"permissions-required"
],
"url": "https://vuldb.com/vuln/385787/cti"
},
{
"name": "CVE-2026-18785 | CVE Analysis and Report",
"tags": [
"third-party-advisory"
],
"url": "https://vuldb.com/cve/CVE-2026-18785"
},
{
"name": "Submit #857052 | open62541 Project open62541 master (commit ca356b088ada7dee824d1b4acd07c1ff07ce242b) Uncontrolled Recursion (Stack Overflow)",
"tags": [
"third-party-advisory"
],
"url": "https://vuldb.com/submit/857052"
},
{
"tags": [
"issue-tracking"
],
"url": "https://github.com/open62541/open62541/issues/8131"
},
{
"tags": [
"exploit",
"issue-tracking"
],
"url": "https://github.com/gff-cw/information/issues/12"
}
],
"timeline": [
{
"lang": "en",
"time": "2026-08-04T00:00:00.000Z",
"value": "Advisory disclosed"
},
{
"lang": "en",
"time": "2026-08-04T02:00:00.000Z",
"value": "VulDB entry created"
},
{
"lang": "en",
"time": "2026-08-04T10:53:57.000Z",
"value": "VulDB entry last update"
}
],
"title": "o6 open62541 client_types_custom.c UA_Client_getRemoteDataTypes use after free",
"x_generator": [
"VulDB PVTS v202608"
]
}
},
"cveMetadata": {
"assignerOrgId": "1af790b2-7ee1-4545-860a-a788eba489b5",
"assignerShortName": "VulDB",
"cveId": "CVE-2026-18785",
"datePublished": "2026-08-04T16:45:08.749Z",
"dateReserved": "2026-08-04T08:30:07.756Z",
"dateUpdated": "2026-08-04T17:35:15.212Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}