Vulnerability DatabaseCVE-2026-65423
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CVE-2026-65423
Published:July 30, 2026
Updated:August 04, 2026
An integer overflow in the UA_Variant arrayDimensions product computation in open62541 may allow a remote attacker to trigger an out-of-bounds write.
Affected Packages
open62541 (CONAN):
Affected version(s) >=1.4.6 <1.4.17
Fix Suggestion:
Update to version 1.4.17
open62541 (CONAN):
Affected version(s) >=1.3.1 <1.3.18
Fix Suggestion:
Update to version 1.3.18
open62541 (CONAN):
Affected version(s) =1.5.0 <1.5.5
Fix Suggestion:
Update to version 1.5.5
https://github.com/open62541/open62541.git (GITHUB):
Affected version(s) >=v1.3 <v1.3.18
Fix Suggestion:
Update to version v1.3.18
https://github.com/open62541/open62541.git (GITHUB):
Affected version(s) >=v1.4.0 <v1.4.17
Fix Suggestion:
Update to version v1.4.17
https://github.com/open62541/open62541.git (GITHUB):
Affected version(s) >=v1.5.0 <v1.5.5
Fix Suggestion:
Update to version v1.5.5
Related Resources (9)
https://github.com/cisagov/CSAF/blob/develop/csaf_files/OT/white/2026/icsa-26-211-08.json
https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/65xxx/CVE-2026-65423.json
https://github.com/open62541/open62541/pull/8237/commits/1b71d9c5d9c4d02d4729b8903a52e9f530bf804e
https://www.o6-automation.com/contact
https://nvd.nist.gov/vuln/detail/CVE-2026-65423
https://www.cisa.gov/news-events/ics-advisories/icsa-26-211-08
https://github.com/open62541/open62541/pull/8236/commits/06b99fef667c8ec5bdf0605b4f00c84fcc1d3a60
https://github.com/open62541/open62541/pull/8235/commits/b666d35769ce63998442e4d0810a3fb10b50179f
https://github.com/open62541/open62541/pull/8238/commits/afab4107bfd161da9ce8bb30ed77f3968c9c97df
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CVSS v4
Base Score:
8.7
Attack Vector
NETWORK
Attack Complexity
LOW
Attack Requirements
NONE
Privileges Required
LOW
User Interaction
NONE
Vulnerable System Confidentiality
HIGH
Vulnerable System Integrity
HIGH
Vulnerable System Availability
HIGH
Subsequent System Confidentiality
NONE
Subsequent System Integrity
NONE
Subsequent System Availability
NONE
CVSS v3
Base Score:
8.8
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH
Weakness Type (CWE)
Integer Overflow or Wraparound
CWE-190
EPSS
Base Score:
0.60