Vulnerability DatabaseCVE-2026-63362
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CVE-2026-63362
Published:July 30, 2026
Updated:August 04, 2026
An unsigned integer underflow in the PubSub signature verification path in open62541 may allow a remote attacker to cause a denial of service via a crafted UDP packet.
Affected Packages
open62541 (CONAN):
Affected version(s) =1.5.0 <1.5.5
Fix Suggestion:
Update to version 1.5.5
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
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) >=v1.3 <v1.3.18
Fix Suggestion:
Update to version v1.3.18
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/open62541/open62541/pull/8235/commits/b666d35769ce63998442e4d0810a3fb10b50179f
https://github.com/open62541/open62541/pull/8238/commits/afab4107bfd161da9ce8bb30ed77f3968c9c97df
https://github.com/cisagov/CSAF/blob/develop/csaf_files/OT/white/2026/icsa-26-211-08.json
https://github.com/open62541/open62541/pull/8236/commits/06b99fef667c8ec5bdf0605b4f00c84fcc1d3a60
https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/63xxx/CVE-2026-63362.json
https://nvd.nist.gov/vuln/detail/CVE-2026-63362
https://www.cisa.gov/news-events/ics-advisories/icsa-26-211-08
https://www.o6-automation.com/contact
https://github.com/open62541/open62541/pull/8237/commits/1b71d9c5d9c4d02d4729b8903a52e9f530bf804e
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CVSS v4
Base Score:
8.2
Attack Vector
NETWORK
Attack Complexity
HIGH
Attack Requirements
NONE
Privileges Required
NONE
User Interaction
NONE
Vulnerable System Confidentiality
NONE
Vulnerable System Integrity
NONE
Vulnerable System Availability
HIGH
Subsequent System Confidentiality
NONE
Subsequent System Integrity
NONE
Subsequent System Availability
NONE
CVSS v3
Base Score:
5.9
Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
HIGH
Weakness Type (CWE)
Integer Underflow (Wrap or Wraparound)
CWE-191
EPSS
Base Score:
1.53