What’s Vulnerable › Vulnerabilities

CVE-2026-32096: Plunk has SSRF via unvalidated AWS SNS SubscriptionConfirmation in POST /webhooks/sns

• Severity: high (CVSS 8.6 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-03-11 · updated 2026-06-17
• Weakness: CWE-918

Description

Plunk is an open-source email platform built on top of AWS SES. Prior to 0.7.0, a Server-Side Request Forgery (SSRF) vulnerability existed in the SNS webhook handler. An unauthenticated attacker could send a crafted request that caused the server to make an arbitrary outbound HTTP GET request to any host accessible from the server. This vulnerability is fixed in 0.7.0.

Affected products

• useplunk plunk: before 0.7.0 — fixed in 0.7.0

How to fix

Upgrade to a fixed version: useplunk plunk 0.7.0. Check the vendor advisory for mitigations.

References

• https://github.com/useplunk/plunk/commit/b8f1ad9ab53c78f8ef063fdc125f397c8bfc7652
• https://github.com/useplunk/plunk/security/advisories/GHSA-xpqg-p8mp-7g44

Get alerted when CVE-2026-32096 or the next vulnerability affects your stack