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CVE-2026-67869

• Severity: high (CVSS 7.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.8% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-08-06 · updated 2026-08-31
• Weakness: CWE-120

Description

Buffer Overflow vulnerability in open62541 v1.5.5 allows a remote attacker to cause a denial of service via the Service_Call validates input arguments against runtime-resolved InputArguments metadata

References

• https://github.com/open62541/open62541/blob/v1.5.5/examples/tutorial_server_alarms_conditions.c
• https://github.com/open62541/open62541/blob/v1.5.5/src/server/ua_services_method.c
• https://github.com/open62541/open62541/blob/v1.5.5/src/server/ua_subscription_alarms_conditions.c
• https://github.com/open62541/open62541/issues/8171
• https://github.com/open62541/open62541/issues/8171

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