Integer Underflow (Wrap or Wraparound)

Overview Affected versions of this package are vulnerable to Integer Underflow Wrap or Wraparound via the PubSub signature verification process. An attacker can cause a denial of service by sending a specially crafted UDP packet. Remediation Upgrade open62541 to version 1.4.20, 1.5.8 or higher...

CVE-2026-63362

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...