open62541 History Backend ua_history_data_backend_memory.c UA_DataValue_backend_copyRange use after free (CVE-2026-82623) | HOL Guard CVE

Unknown severity · Source severity not reportedCVE-2026-82623

open62541 History Backend ua_history_data_backend_memory.c UA_DataValue_backend_copyRange use after free

Answer in brief

CVE-2026-82623 records a Unknown severity vulnerability in open62541 History Backend ua_history_data_backend_memory.c UA_DataValue_backend_copyRange use after free. The current sources do not mark it as known exploited. The current feed maps n/a/open62541 (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Aug 31, 2026Updated Aug 31, 2026Source checked Aug 31, 2026First seen by HOL Aug 31, 2026Material review Aug 31, 2026

Upstream Advisory

Key facts

Risk: Unknown severitySource severity not reported
Exploitation: Not marked as known exploited
Affected software: 1 mapped package or product
Fix availability: Not reported

Why this deserves its current priority

A CVSS score is not reported in the current record. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps n/a/open62541 (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
n/a/open62541generic	1.5.0 \|\| 1.5.1 \|\| 1.5.2 \|\| 1.5.3 \|\| 1.5.4 \|\| 1.5.5	Not reported

Recommended response

Check inventory. Check lockfiles and deployed manifests for n/a/open62541.
Review the reported fix. Monitor this advisory for an available fix and review any installs of the affected package.

Evidence timeline and material changes

Published upstream
Aug 31, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Aug 31, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Aug 31, 2026

Sources and claim methodology

Upstream source 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.

Quoted source text, attributed separately from HOL analysis.