by Kastro
Paper/Archive/CVE-2026-32096

CVE-2026-32096

useplunk plunk — Plunk has SSRF via unvalidated AWS SNS SubscriptionConfirmation in POST /webhooks/sns

EPSS 0.3%CVSS 9.3
critical.is priorityof 100
32
CVSS 9.3 (CNA)9.3 / 10 × 3027.9Not in CISA KEV+300.0EPSS percentile 21.0.210 × 204.2No public exploit+100.0SSVC exploitation: none+100.0
Description · from the CVE record

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

ProductAffectedFixed inSource
plunk< 0.7.0–CNA

Scores by source

GitHub_M (CNA)9.3CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:L/A:N
CISA ADPSSVCExploitation: none · Automatable: yes · Technical impact: partial

References

refgithub.com/useplunk/plunk/security/advisories/GHSA-xpqg-p8mp-7g44refgithub.com/useplunk/plunk/commit/b8f1ad9ab53c78f8ef063fdc125f397c8bfc7652