๐Ÿ›ก๏ธ CVE-2026-42193
๐Ÿ”ด CVSS 9.1 โ€” Critical โœ… No Known Exploit CWE-347 NVD
9.1
CVSS Score
0 Low4 Medium7 High9 Critical10

Description

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.

Details

Severity CRITICAL
CVSS Score 9.1
CVSS Vector CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H
CWE CWE-347
Public Exploit โœ… No
Source NVD
Published 2026-05-08
Updated 2026-06-02
Modified 2026-05-12
Fix URL N/A

Affected Packages

Software From version Fixed in
unknown โ€” โ€”

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