CVE-2026-18785
o6 open62541 client_types_custom.c UA_Client_getRemoteDataTypes use after free
- State
- Published
- Severity
- 4.8 Medium
- Published
- Aug 4, 2026
- Updated
- Aug 4, 2026
- Reserved
- Aug 4, 2026
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 4.8 Medium | 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 | VulDB |
| 3.1 | 5.3 Medium | 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 | VulDB |
| 3.0 | 5.3 Medium | 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 | VulDB |
| 2.0 | 4.3 Medium | AV:L/AC:L/Au:S/C:P/I:P/A:P/E:POC/RL:ND/RC:UR | VulDB |
Weaknesses
Affected Products
| Product | Versions |
|---|---|
open62541o6 |
|
References
- VDB-385787 | o6 open62541 client_types_custom.c UA_Client_getRemoteDataTypes use after freevdb-entrytechnical-description
- VDB-385787 | CTI Indicators (IOB, IOC, IOA)signaturepermissions-required
- CVE-2026-18785 | CVE Analysis and Reportthird-party-advisory
- Submit #857052 | open62541 Project open62541 master (commit ca356b088ada7dee824d1b4acd07c1ff07ce242b) Uncontrolled Recursion (Stack Overflow)third-party-advisory
- https://github.com/open62541/open62541/issues/8131issue-tracking
- https://github.com/gff-cw/information/issues/12exploitissue-tracking
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