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4 vulnerabilities by open62541 project / o6 Automation GmbH
CVE-2026-11946 (GCVE-0-2026-11946)
Vulnerability from nvd – Published: 2026-07-02 10:54 – Updated: 2026-07-02 12:15
VLAI
Title
GetEndpoints Memory Exhaustion in open62541
Summary
An unauthenticated remote attacker can exhaust
server memory via the GetEndpoints Discovery Service in open62541. The
endpointUrl field of GetEndpointsRequest is not validated for length. An
attacker can declare an arbitrarily large string (up to ~4.09 GB via the UInt32
length field) delivered across intermediate chunks without ever sending the
final chunk. The server buffers all chunks in RAM indefinitely until the
SecureChannel times out. The attack is
pre-session and bypasses all encryption configurations.
The issue affects open62541: from 1.4.0 through 1.4.16, from 1.5.0 through 1.5.4, master.
Severity
7.5 (High)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
Assigner
References
3 references
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| open62541 project / o6 Automation GmbH | open62541 |
Affected:
1.4.0 , ≤ 1.4.16
(semver)
Affected: 1.5.0 , ≤ 1.5.4 (semver) Affected: master (custom) |
Credits
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CVE-2026-33592 (GCVE-0-2026-33592)
Vulnerability from nvd – Published: 2026-07-02 07:12 – Updated: 2026-07-02 12:30
VLAI
Title
FindServers Memory Exhaustion in open62541
Summary
An unauthenticated remote attacker can exhaust
server memory via the FindServers Discovery Service in open62541. The
serverUris field of FindServersRequest is not validated for length or array
size. An attacker can declare an arbitrarily large string (up to ~3.9 GB)
delivered across intermediate chunks without ever sending the final chunk. The
server buffers all chunks in RAM indefinitely until the SecureChannel times
out. The attack is pre-session and bypasses all encryption configuration. The issue affects open62541: from 1.4.0 through 1.4.16, from 1.5.0 through 1.5.4, master.
Severity
7.5 (High)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
Assigner
References
3 references
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| open62541 project / o6 Automation GmbH | open62541 |
Affected:
1.4.0 , ≤ 1.4.16
(semver)
Affected: 1.5.0 , ≤ 1.5.4 (semver) Affected: master (custom) |
Credits
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CVE-2026-11946 (GCVE-0-2026-11946)
Vulnerability from cvelistv5 – Published: 2026-07-02 10:54 – Updated: 2026-07-02 12:15
VLAI
Title
GetEndpoints Memory Exhaustion in open62541
Summary
An unauthenticated remote attacker can exhaust
server memory via the GetEndpoints Discovery Service in open62541. The
endpointUrl field of GetEndpointsRequest is not validated for length. An
attacker can declare an arbitrarily large string (up to ~4.09 GB via the UInt32
length field) delivered across intermediate chunks without ever sending the
final chunk. The server buffers all chunks in RAM indefinitely until the
SecureChannel times out. The attack is
pre-session and bypasses all encryption configurations.
The issue affects open62541: from 1.4.0 through 1.4.16, from 1.5.0 through 1.5.4, master.
Severity
7.5 (High)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
Assigner
References
3 references
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| open62541 project / o6 Automation GmbH | open62541 |
Affected:
1.4.0 , ≤ 1.4.16
(semver)
Affected: 1.5.0 , ≤ 1.5.4 (semver) Affected: master (custom) |
Credits
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CVE-2026-33592 (GCVE-0-2026-33592)
Vulnerability from cvelistv5 – Published: 2026-07-02 07:12 – Updated: 2026-07-02 12:30
VLAI
Title
FindServers Memory Exhaustion in open62541
Summary
An unauthenticated remote attacker can exhaust
server memory via the FindServers Discovery Service in open62541. The
serverUris field of FindServersRequest is not validated for length or array
size. An attacker can declare an arbitrarily large string (up to ~3.9 GB)
delivered across intermediate chunks without ever sending the final chunk. The
server buffers all chunks in RAM indefinitely until the SecureChannel times
out. The attack is pre-session and bypasses all encryption configuration. The issue affects open62541: from 1.4.0 through 1.4.16, from 1.5.0 through 1.5.4, master.
Severity
7.5 (High)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
Assigner
References
3 references
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| open62541 project / o6 Automation GmbH | open62541 |
Affected:
1.4.0 , ≤ 1.4.16
(semver)
Affected: 1.5.0 , ≤ 1.5.4 (semver) Affected: master (custom) |
Credits
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