CVE-2026-128334: listmonk 6.2.0 before 7.0.0-beta.2 Missing Authentication via Azure Bounce Webhook
knadh · listmonk
Fixed in 7.0.0-beta.2 · Affected: knadh listmonk before 7.0.0-beta.2 · Exploitation: unlikely (under 1%)
Not in CyberSIXT coverage yet: no article names this CVE. This page shows the public record.
Higher than 30% of scored CVEs
DescriptionCVE.org
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.
Affected products1
From the CVE record. A product or version that is not listed is unknown, not unaffected.
- knadh · listmonkfrom 6.2.0 before 7.0.0-beta.2
On the Atlas
Every published CVE is on the CyberSIXT Atlas, grouped by weakness, vendor and month.
- Exploitation
- Unlikely (under 1%). EPSS under 1%, or no score yet.
- CISA KEV
- Not listed
- Public check
- No public nuclei template
- Vendor
- knadh
- Published
- November 2026
CoverageNo articles yet
No CyberSIXT article names CVE-2026-128334 yet, so there is no coverage timeline, action brief or change log for it. Everything on this page comes from the public CVE record, CISA KEV, EPSS and the nuclei template index. Search the archive or see the CVEs in the news.