CVE-2026-23845

{"id": "CVE-2026-23845", "cveTags": [], "metrics": {"ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-23845", "role": "CISA Coordinator", "options": [{"exploitation": "none"}, {"automatable": "yes"}, {"technicalImpact": "partial"}], "version": "2.0.3", "timestamp": "2026-01-20T20:04:04.082622Z"}}], "cvssMetricV31": [{"type": "Secondary", "source": "security-advisories@github.com", "cvssData": {"scope": "CHANGED", "version": "3.1", "baseScore": 5.8, "attackVector": "NETWORK", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:N/A:N", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "NONE", "privilegesRequired": "NONE", "confidentialityImpact": "LOW"}, "impactScore": 1.4, "exploitabilityScore": 3.9}, {"type": "Primary", "source": "nvd@nist.gov", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 7.5, "attackVector": "NETWORK", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "NONE", "privilegesRequired": "NONE", "confidentialityImpact": "HIGH"}, "impactScore": 3.6, "exploitabilityScore": 3.9}]}, "affected": [{"source": "security-advisories@github.com", "affectedData": [{"vendor": "axllent", "product": "mailpit", "versions": [{"status": "affected", "version": "< 1.28.3"}]}]}], "published": "2026-01-19T19:16:04.820", "references": [{"url": "https://github.com/axllent/mailpit/commit/1679a0aba592ebc8487a996d37fea8318c984dfe", "tags": ["Patch"], "source": "security-advisories@github.com"}, {"url": "https://github.com/axllent/mailpit/releases/tag/v1.28.3", "tags": ["Product", "Release Notes"], "source": "security-advisories@github.com"}, {"url": "https://github.com/axllent/mailpit/security/advisories/GHSA-6jxm-fv7w-rw5j", "tags": ["Exploit", "Vendor Advisory"], "source": "security-advisories@github.com"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Secondary", "source": "security-advisories@github.com", "description": [{"lang": "en", "value": "CWE-918"}]}], "descriptions": [{"lang": "en", "value": "Mailpit is an email testing tool and API for developers. Versions prior to 1.28.3 are vulnerable to Server-Side Request Forgery (SSRF) via HTML Check CSS Download. The HTML Check feature (`/api/v1/message/{ID}/html-check`) is designed to analyze HTML emails for compatibility. During this process, the `inlineRemoteCSS()` function automatically downloads CSS files from external `<link rel=\"stylesheet\" href=\"...\">` tags to inline them for testing. Version 1.28.3 fixes the issue."}, {"lang": "es", "value": "Mailpit es una herramienta de prueba de correo electr\u00f3nico y API para desarrolladores. Las versiones anteriores a la 1.28.3 son vulnerables a la falsificaci\u00f3n de petici\u00f3n del lado del servidor (SSRF) a trav\u00e9s de la descarga de CSS de la funci\u00f3n HTML Check. La funci\u00f3n HTML Check ('/api/v1/message/{ID}/html-check') est\u00e1 dise\u00f1ada para analizar correos electr\u00f3nicos HTML para compatibilidad. Durante este proceso, la funci\u00f3n 'inlineRemoteCSS()' descarga autom\u00e1ticamente archivos CSS de etiquetas externas ' para incrustarlos para pruebas. La versi\u00f3n 1.28.3 corrige el problema."}], "lastModified": "2026-06-17T10:22:11.673", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:axllent:mailpit:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "D00C1680-049F-472C-A900-66D6B2A11A04", "versionEndExcluding": "1.28.3"}], "operator": "OR"}]}], "sourceIdentifier": "security-advisories@github.com"}