CVE-2026-42193

Plunk: SNS webhook forgery

CVSS 9.1 CRITICALEPSS 0.1%CWE-347

Vexday Risk Score

28Baixo

Decisão SSVC (CISA)

Track

Sem sinal de exploração → monitorar

CVSS 9.1EPSS 0.1%KEV nãoPoC —Nuclei —Metasploit —Patch —

Ciclo de vida

08 mai 2026Publicada no NVD

Recomendação: Monitorar — sem sinal de exploração no momento.

Plunk is an open-source email platform built on top of AWS SES. Prior to version 0.9.0, the /webhooks/sns endpoint accepts Amazon SNS notification payloads from unauthenticated requests without verifying the SNS signature, certificate, or topic ARN, meaning anyone can forge a valid-looking webhook request. This allows an unauthenticated attacker to spoof SNS events to trigger workflow automations, unsubscribe contacts, manipulate email delivery metrics, and potentially exhaust billing credits. This issue has been patched in version 0.9.0.

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H

Produtos afetados

useplunk · plunk

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Referências

https://github.com/useplunk/plunk/releases/tag/v0.9.0 https://github.com/useplunk/plunk/security/advisories/GHSA-9792-w86v-gx53