CVE-2026-42596

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{"affected": [{"affectedData": [{"product": "gotenberg", "vendor": "gotenberg", "versions": [{"status": "affected", "version": "< 8.31.0"}]}], "source": "security-advisories@github.com"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:a:thecodingmachine:gotenberg:*:*:*:*:*:*:*:*", "matchCriteriaId": "953D4808-E728-472B-94E3-9714C1E2EA1C", "versionEndExcluding": "8.31.0", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "Gotenberg is a Docker-powered stateless API for PDF files. Prior to 8.31.0, the default deny-lists used by Gotenberg's downloadFrom feature and webhook feature are bypassable. Because the filter is regex-based and case-sensitive, an unauthenticated attacker can supply URLs such as http://[::ffff:127.0.0.1]:... and reach loopback or private HTTP services that the default deny-list is intended to block. This crosses a real security boundary because an external caller can force the server to make outbound requests to internal-only targets. This vulnerability is fixed in 8.31.0."}, {"lang": "es", "value": "Gotenberg es una API sin estado impulsada por Docker para archivos PDF. Antes de la versi\u00f3n 8.31.0, las listas de denegaci\u00f3n predeterminadas utilizadas por la funci\u00f3n downloadFrom y la funci\u00f3n de webhook de Gotenberg son eludibles. Debido a que el filtro est\u00e1 basado en expresiones regulares y distingue entre may\u00fasculas y min\u00fasculas, un atacante no autenticado puede proporcionar URLs como http://[::ffff:127.0.0.1]:... y alcanzar servicios HTTP de bucle invertido o privados que la lista de denegaci\u00f3n predeterminada pretende bloquear. Esto cruza un l\u00edmite de seguridad real porque un llamador externo puede forzar al servidor a realizar solicitudes salientes a objetivos solo internos. Esta vulnerabilidad est\u00e1 corregida en la versi\u00f3n 8.31.0."}], "id": "CVE-2026-42596", "lastModified": "2026-11-11T20:10:00.273", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "LOW", "baseScore": 9.4, "baseSeverity": "CRITICAL", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:L", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 5.5, "source": "security-advisories@github.com", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-42596", "options": [{"exploitation": "poc"}, {"automatable": "yes"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-05-15T16:03:36.707460Z", "version": "2.0.3"}}]}, "published": "2026-05-14T16:16:22.893", "references": [{"source": "security-advisories@github.com", "tags": ["Exploit", "Mitigation", "Vendor Advisory"], "url": "https://github.com/gotenberg/gotenberg/security/advisories/GHSA-4vmc-gm8v-m35h"}, {"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "tags": ["Exploit", "Mitigation", "Vendor Advisory"], "url": "https://github.com/gotenberg/gotenberg/security/advisories/GHSA-4vmc-gm8v-m35h"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-918"}], "source": "security-advisories@github.com", "type": "Secondary"}]}

{}

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