CVE-2026-82623

open62541 History Backend ua_history_data_backend_memory.c UA_DataValue_backend_copyRange use after free

MEDIUM
5.3
CVSS Score
Published: August 31, 2026 at 06:15 AM UTC
Updated: August 31, 2026 at 09:06 PM UTC
1 product affected across 1 vendorOPEN62541

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Severity
MEDIUM5.3
Exploit prediction
EPSS 0.7%
SSVC
PoC

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

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Remediation

No guide yet

No remediation guidance has been written for this CVE yet, and no fixed version or vendor advisory is recorded against it.

References (6)

VDB EntryTechnical Description
Source: cverecord
https://vuldb.com/vuln/397123
SignaturePermissions Required
Source: cverecord
https://vuldb.com/vuln/397123/cti
Third Party Advisory
Source: cverecord
https://vuldb.com/cve/CVE-2026-82623
Third Party Advisory
Source: cverecord
https://vuldb.com/submit/893207
ExploitIssue Tracking
Source: cverecord
https://github.com/open62541/open62541/issues/8199

SSVC — Action Prioritization

SSVCPoCAutomatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

5.3MEDIUMVulDB
Vector?

Quick Info

StatusDEFERRED
CWE
CWE-416CWE-119

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