What’s Vulnerable › Vulnerabilities

CVE-2026-82623: open62541 History Backend ua_history_data_backend_memory.c UA_DataValue_backend_copyRange use after free

• Severity: medium (CVSS 5.3 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.7% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-08-31 · updated 2026-08-31
• Weakness: CWE-119

Description

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.

Affected products

• open62541: 1.5.0, 1.5.1, 1.5.2, 1.5.3, 1.5.4, 1.5.5

References

• https://github.com/open62541/open62541/
• https://github.com/open62541/open62541/issues/8199
• https://vuldb.com/cve/CVE-2026-82623
• https://vuldb.com/submit/893207
• https://vuldb.com/vuln/397123
• https://vuldb.com/vuln/397123/cti
• https://vuldb.com/submit/893207

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