CVE Explorer

CVE-2026-42193

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. T

Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:e5f65fc089996df6d9b25e720b7770c4ebffc7fc75b9f327531784f6ab044c25

Known exploited

Not asserted

Disputed

Stale source

Conflicts

Affected products and versions

1 source assertion

{"product":"plunk","vendor":"useplunk","versions":[{"status":"affected","version":"< 0.9.0"}]}

cve_program_cvelist_v5affected
urn:baitaphish:normalized-source-record:v2:f93fa6dabae6579776b9044006db6c7be51ff47ab5951a33c01dced4eb69a626 · sha256:2fa00885c0ea8fb4… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion

{"metric":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"HIGH","baseScore":9.1,"baseSeverity":"CRITICAL","confidentialityImpact":"NONE","integrityImpact":"HIGH","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H","version":"3.1"},"metric_type":"cvssV3_1"}

cve_program_cvelist_v5cvss
urn:baitaphish:normalized-source-record:v2:f93fa6dabae6579776b9044006db6c7be51ff47ab5951a33c01dced4eb69a626 · sha256:2fa00885c0ea8fb4… · /containers/cna/metrics/0/cvssV3_1

CWE assertions

1 source assertion

{"cweId":"CWE-347","description":"CWE-347: Improper Verification of Cryptographic Signature","lang":"en","type":"CWE"}

cve_program_cvelist_v5cwe
urn:baitaphish:normalized-source-record:v2:f93fa6dabae6579776b9044006db6c7be51ff47ab5951a33c01dced4eb69a626 · sha256:2fa00885c0ea8fb4… · /containers/cna/problemTypes/0/descriptions/0

Source references

2 source assertions

{"name":"https://github.com/useplunk/plunk/releases/tag/v0.9.0","tags":["x_refsource_MISC"],"url":"https://github.com/useplunk/plunk/releases/tag/v0.9.0"}

cve_program_cvelist_v5reference
urn:baitaphish:normalized-source-record:v2:f93fa6dabae6579776b9044006db6c7be51ff47ab5951a33c01dced4eb69a626 · sha256:2fa00885c0ea8fb4… · /containers/cna/references/1

{"name":"https://github.com/useplunk/plunk/security/advisories/GHSA-9792-w86v-gx53","tags":["x_refsource_CONFIRM"],"url":"https://github.com/useplunk/plunk/security/advisories/GHSA-9792-w86v-gx53"}

cve_program_cvelist_v5reference
urn:baitaphish:normalized-source-record:v2:f93fa6dabae6579776b9044006db6c7be51ff47ab5951a33c01dced4eb69a626 · sha256:2fa00885c0ea8fb4… · /containers/cna/references/0

Attribution and limitations

CVE Program CVEList V5: Reproduce the MITRE copyright designation and CVE license in copies. Source →

Provider severity values are preserved separately. Baitaphish does not convert them into a risk rating, infer affected products, or treat EPSS as observed exploitation.

← Back to CVE Explorer