PT-2026-146548

CVE-2026-128334

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Published

2026-11-13

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Updated

2026-11-13

Description by

CVSS 3.1
4.8
Medium
MetricsAV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:L
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.
Exploitability
Fix
Researchers
Vendors
Affected products
Weakness enumeration
CWE-636: Not Failing Securely (\'Failing Open\')
Related identifiers
CVE-2026-128334
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