Uncontrolled Resource Consumption in asyncua and opcua
Published Aug 23, 2022 · Updated Oct 23, 2026 · Also known as GHSA-mfpj-3qhm-976m, PYSEC-2026-888, PYSEC-2026-2385
Original summary
Normalized public record · Updated Oct 23, 2026
Uncontrolled Resource Consumption in asyncua and opcua
Publisher and source text is retained separately from QFinch interpretation.
QFinch assessment
All versions of package opcua; all versions of package asyncua are vulnerable to Denial of Service (DoS) due to a missing limitation on the number of received chunks - per single session or in total for all concurrent sessions. An attacker can exploit this vulnerability by sending an unlimited number of huge chunks (e.g. 2GB each) without sending the Final closing chunk.
Evidence: public source recordsAffected products
| Affected package, product or range | Fix status |
|---|---|
| Consult the referenced vendor advisory for affected versions. | Consult source advisory |
Matching a version is only one part of assessing exposure. QFinch has not assessed your environment on this public page.
Remediation
Apply the vendor-supported fixed release or mitigation, then verify the affected component is no longer reachable.
- Confirm the affected product and reachable code path exist in your environment.
- Apply the vendor-supported patch or mitigation from the primary advisory.
- Rescan the exact deployed revision and retain verification evidence.
Evidence coverage
- SSVC priority
- MEDIUM
- Confidence
- 10%
- Aliases
- GHSA-mfpj-3qhm-976m, PYSEC-2026-888, PYSEC-2026-2385
Scores appear only when corresponding evidence exists. Missing data is never interpreted as zero risk.
Sources and record history
Record history
Published Aug 23, 2022 · Last refreshed Oct 23, 2026