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TI-2026-15388 Aliases CVE-2026-18784GHSA-r2hr-h3px-675c

o6 open62541 ua_client_highlevel.c UA_Client_readNodeClassAttribute heap-based overflow

Priority MEDIUM 55CWE-119Published · Updated

Key facts

Attack vector
Local
Privileges required
Low
User interaction
None
Attack complexity
Low
Attack requirements
None
Impact type
—
Confidentiality · integrity · availability
Low · Low · Low
Fix status
No fix listed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA.

Summary

A vulnerability was found in o6 open62541 up to 1.5.5. This issue affects the function UA_Client_readNodeClassAttribute of the file src/client/ua_client_highlevel.c. Performing a manipulation results in heap-based buffer overflow. Attacking locally is a requirement. The exploit has been made public and could be used. The project closed the issue report, stating that this is not the official way to report a security vulnerability.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00172 6th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by the CNA
Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
o6open625411.5.0; 1.5.1; 1.5.2; 1.5.3; 1.5.4; 1.5.5—No fix listedCNA
  • open62541 Vendoro6 Affected 1.5.0; 1.5.1; 1.5.2; 1.5.3; 1.5.4; 1.5.5 Fixed in — No fix listed CNA

CPE names CNA · 1

CPEVersionsRoleVendor
cpe:2.3:a:open62541:open62541:*:*:*:*:*:*:*:*——open62541
  • cpe:2.3:a:open62541:open62541:*:*:*:*:*:*:*:* Versions — — ·open62541

Remediation

No fixed version listed by the sources yet.

Vendor assessments

Red Hat

Red Hat's page for this CVE →

Not affected: 1 product
  • Red Hat

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-18784
  2. 2026-10-03 Alias added: GHSA-r2hr-h3px-675c

References

Exploit 1

Other 1

  • TI-2026-15389 o6 open62541 client_types_custom.c UA_Client_getRemoteDataTypes use after free CVSS 4.0MEDIUM 4.8

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences