listmonk 6.2.0 before 7.0.0-beta.2 contains a missing authentication vulnerability that allows unauthenticated attackers to submit Azure Event Grid bounce webhooks when no shared secret is configured. Attackers can POST forged EmailDeliveryReportReceived events with Bounced status to /webhooks/service/azure to blocklist, unsubscribe, or delete arbitrary subscribers.
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Fixes
Solution
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Workaround
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References
History
Fri, 13 Nov 2026 09:45:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Description | listmonk 6.2.0 before 7.0.0-beta.2 contains a missing authentication vulnerability that allows unauthenticated attackers to submit Azure Event Grid bounce webhooks when no shared secret is configured. Attackers can POST forged EmailDeliveryReportReceived events with Bounced status to /webhooks/service/azure to blocklist, unsubscribe, or delete arbitrary subscribers. | |
| Title | listmonk 6.2.0 before 7.0.0-beta.2 Missing Authentication via Azure Bounce Webhook | |
| Weaknesses | CWE-636 | |
| References |
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| Metrics |
cvssV3_1
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Status: PUBLISHED
Assigner: VulnCheck
Published:
Updated: 2026-11-13T09:33:40.800Z
Reserved: 2026-11-13T01:20:37.824Z
Link: CVE-2026-128334
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Status : Deferred
Published: 2026-11-13T10:18:13.370
Modified: 2026-11-13T10:18:13.513
Link: CVE-2026-128334
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OpenCVE Enrichment
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Weaknesses