CVE-2026-42193

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-42193", "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "state": "PUBLISHED", "assignerShortName": "GitHub_M", "dateReserved": "2026-04-25T01:53:21.584Z", "datePublished": "2026-05-08T21:12:26.450Z", "dateUpdated": "2026-05-11T18:06:33.364Z"}, "containers": {"cna": {"title": "Plunk: SNS webhook forgery", "problemTypes": [{"descriptions": [{"cweId": "CWE-347", "lang": "en", "description": "CWE-347: Improper Verification of Cryptographic Signature", "type": "CWE"}]}], "metrics": [{"cvssV3_1": {"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"}}], "references": [{"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"}, {"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"}], "affected": [{"vendor": "useplunk", "product": "plunk", "versions": [{"version": "< 0.9.0", "status": "affected"}]}], "providerMetadata": {"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "shortName": "GitHub_M", "dateUpdated": "2026-05-08T21:12:26.450Z"}, "descriptions": [{"lang": "en", "value": "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."}], "source": {"advisory": "GHSA-9792-w86v-gx53", "discovery": "UNKNOWN"}}, "adp": [{"metrics": [{"other": {"type": "ssvc", "content": {"timestamp": "2026-05-11T18:05:40.960607Z", "id": "CVE-2026-42193", "options": [{"Exploitation": "none"}, {"Automatable": "yes"}, {"Technical Impact": "total"}], "role": "CISA Coordinator", "version": "2.0.3"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-05-11T18:06:33.364Z"}}]}}

{"dataType": "CVE_RECORD", "containers": {"adp": [{"title": "CISA ADP Vulnrichment", "metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2026-42193", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "yes"}, {"Technical Impact": "total"}], "version": "2.0.3", "timestamp": "2026-05-11T18:05:40.960607Z"}}}], "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-05-11T18:06:28.244Z"}}], "cna": {"title": "Plunk: SNS webhook forgery", "source": {"advisory": "GHSA-9792-w86v-gx53", "discovery": "UNKNOWN"}, "metrics": [{"cvssV3_1": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 9.1, "attackVector": "NETWORK", "baseSeverity": "CRITICAL", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "NONE", "confidentialityImpact": "NONE"}}], "affected": [{"vendor": "useplunk", "product": "plunk", "versions": [{"status": "affected", "version": "< 0.9.0"}]}], "references": [{"url": "https://github.com/useplunk/plunk/security/advisories/GHSA-9792-w86v-gx53", "name": "https://github.com/useplunk/plunk/security/advisories/GHSA-9792-w86v-gx53", "tags": ["x_refsource_CONFIRM"]}, {"url": "https://github.com/useplunk/plunk/releases/tag/v0.9.0", "name": "https://github.com/useplunk/plunk/releases/tag/v0.9.0", "tags": ["x_refsource_MISC"]}], "descriptions": [{"lang": "en", "value": "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."}], "problemTypes": [{"descriptions": [{"lang": "en", "type": "CWE", "cweId": "CWE-347", "description": "CWE-347: Improper Verification of Cryptographic Signature"}]}], "providerMetadata": {"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "shortName": "GitHub_M", "dateUpdated": "2026-05-08T21:12:26.450Z"}}}, "cveMetadata": {"cveId": "CVE-2026-42193", "state": "PUBLISHED", "dateUpdated": "2026-05-11T18:06:33.364Z", "dateReserved": "2026-04-25T01:53:21.584Z", "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "datePublished": "2026-05-08T21:12:26.450Z", "assignerShortName": "GitHub_M"}, "dataVersion": "5.2"}

{"affected": [{"affectedData": [{"product": "plunk", "vendor": "useplunk", "versions": [{"status": "affected", "version": "< 0.9.0"}]}], "source": "security-advisories@github.com"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "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."}, {"lang": "es", "value": "Plunk es una plataforma de correo electr\u00f3nico de c\u00f3digo abierto construida sobre AWS SES. Antes de la versi\u00f3n 0.9.0, el endpoint /webhooks/sns acepta cargas \u00fatiles de notificaci\u00f3n de Amazon SNS de solicitudes no autenticadas sin verificar la firma de SNS, el certificado o el ARN del tema, lo que significa que cualquiera puede falsificar una solicitud de webhook de apariencia v\u00e1lida. Esto permite a un atacante no autenticado suplantar eventos de SNS para activar automatizaciones de flujo de trabajo, cancelar la suscripci\u00f3n de contactos, manipular m\u00e9tricas de entrega de correo electr\u00f3nico y potencialmente agotar los cr\u00e9ditos de facturaci\u00f3n. Este problema ha sido parcheado en la versi\u00f3n 0.9.0."}], "id": "CVE-2026-42193", "lastModified": "2026-10-26T18:10:00.173", "metrics": {"cvssMetricV31": [{"cvssData": {"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"}, "exploitabilityScore": 3.9, "impactScore": 5.2, "source": "security-advisories@github.com", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-42193", "options": [{"exploitation": "none"}, {"automatable": "yes"}, {"technicalImpact": "total"}], "role": "CISA Coordinator", "timestamp": "2026-05-11T18:05:40.960607Z", "version": "2.0.3"}}]}, "published": "2026-05-08T22:16:31.273", "references": [{"source": "security-advisories@github.com", "url": "https://github.com/useplunk/plunk/releases/tag/v0.9.0"}, {"source": "security-advisories@github.com", "url": "https://github.com/useplunk/plunk/security/advisories/GHSA-9792-w86v-gx53"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Deferred", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-347"}], "source": "security-advisories@github.com", "type": "Secondary"}]}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[0,0.9.0)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "plunk", "source": "cna", "vendor": "useplunk"}, "product": "plunk", "vendor": "useplunk"}], "created": "2026-05-08T22:30:18.334347+00:00", "updated": "2026-05-08T23:00:15.752397+00:00", "vendors": ["useplunk", "useplunk$PRODUCT$plunk"]}