CVE-2026-18784 (GCVE-0-2026-18784)

Vulnerability from cvelistv5 – Published: 2026-08-04 16:30 – Updated: 2026-08-05 14:55
VLAI
Title
o6 open62541 ua_client_highlevel.c UA_Client_readNodeClassAttribute heap-based overflow
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.
Severity
4.8 (Medium)
CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P
5.3 (Medium)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L/E:P/RL:X/RC:R
5.3 (Medium)
CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L/E:P/RL:X/RC:R
SSVC
Exploitation: poc Automatable: no Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
Assigner
References
URL Tags
https://vuldb.com/vuln/385786 vdb-entrytechnical-description
https://vuldb.com/vuln/385786/cti signaturepermissions-required
https://vuldb.com/cve/CVE-2026-18784 third-party-advisory
https://vuldb.com/submit/857012 third-party-advisory
https://github.com/open62541/open62541/issues/8139 issue-tracking
https://github.com/gff-cw/information/issues/11 exploitissue-tracking
Impacted products
Vendor Product Version
o6 open62541 Affected: 1.5.0
Affected: 1.5.1
Affected: 1.5.2
Affected: 1.5.3
Affected: 1.5.4
Affected: 1.5.5
    cpe:2.3:a:open62541:open62541:*:*:*:*:*:*:*:*
 Create a notification for this product.
Credits
Chuan Wei VULL (VulDB User) SCU_1CP (VulDB User) VulDB CNA Team
Show details on NVD website
To clipboard 

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Taxonomy of the tags.





Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.