CVE-2026-82623open62541 History Backend ua_history_data_backend_memory.c UA_DataValue_backend_copyRange use after free
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It affects n/a open62541. Add what you run to find out whether that includes you.
No exploitation reported and no EPSS estimate yet.
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A vulnerability was detected in open62541 up to 1.5.5. Affected by this vulnerability is the function UA_DataValue_backend_copyRange of the file plugins/historydata/ua_history_data_backend_memory.c of the component History Backend. The manipulation results in use after free. The attack can be launched remotely. The exploit is now public and may be used. The project closed the issue report, stating that this is not the official way to report a security vulnerability.
- CVSS
- 5.3 MEDIUM (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L/E:P/RL:X/RC:R
- Weakness (CWE)
- CWE-416, CWE-119
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- VulDB
- NVD analysis
- Deferred
- Record last updated
- Aug 31, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
n/a open62541 open62541:open62541 | 1.5.0; 1.5.1; 1.5.2; 1.5.3; 1.5.4; 1.5.5 | CNA record |
References
- https://vuldb.com/vuln/397123vdb-entry, technical-description
- https://vuldb.com/vuln/397123/ctisignature, permissions-required
- https://vuldb.com/cve/CVE-2026-82623third-party-advisory
- https://vuldb.com/submit/893207third-party-advisory
- https://github.com/open62541/open62541/issues/8199exploit, issue-tracking
- https://github.com/open62541/open62541/product
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.