CVE-2026-73255

{"id": "CVE-2026-73255", "cveTags": [], "metrics": {"ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-73255", "role": "CISA Coordinator", "options": [{"exploitation": "poc"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "version": "2.0.3", "timestamp": "2026-08-25T15:09:21.374366Z"}}], "cvssMetricV31": [{"type": "Secondary", "source": "security-advisories@github.com", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 6.5, "attackVector": "NETWORK", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "NONE", "privilegesRequired": "LOW", "confidentialityImpact": "HIGH"}, "impactScore": 3.6, "exploitabilityScore": 2.8}]}, "affected": [{"source": "security-advisories@github.com", "affectedData": [{"vendor": "cesanta", "product": "mongoose", "versions": [{"status": "affected", "version": "< 7.22"}]}]}], "published": "2026-08-20T18:16:46.313", "references": [{"url": "https://github.com/cesanta/mongoose/commit/a9df523f76f43a38bd53b4232b9cfd4c16869e71", "tags": ["Patch"], "source": "security-advisories@github.com"}, {"url": "https://github.com/cesanta/mongoose/pull/3611", "tags": ["Issue Tracking", "Patch"], "source": "security-advisories@github.com"}, {"url": "https://github.com/cesanta/mongoose/releases/tag/7.22", "tags": ["Release Notes"], "source": "security-advisories@github.com"}, {"url": "https://github.com/cesanta/mongoose/security/advisories/GHSA-h7m9-764r-7x4x", "tags": ["Exploit", "Vendor Advisory"], "source": "security-advisories@github.com"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Secondary", "source": "security-advisories@github.com", "description": [{"lang": "en", "value": "CWE-22"}]}], "descriptions": [{"lang": "en", "value": "Mongoose is an embedded web server and network library. Prior to 7.22, an attacker who can control an SSI-enabled file can place directory traversal sequences in an #include file or #include virtual directive. The mg_ssi() function in src/ssi.c concatenates the directive argument into a filesystem path without calling mg_path_is_sane(), allowing an MG_ENABLE_SSI deployment with ssi_pattern configured to disclose files readable by the Mongoose process. This issue is fixed in version 7.22."}, {"lang": "es", "value": "Mongoose es un servidor web embebido y una biblioteca de red. Antes de la versi\u00f3n 7.22, un atacante que puede controlar un archivo habilitado para SSI puede colocar secuencias de salto de directorio en un archivo #include o en una directiva #include virtual. La funci\u00f3n mg_ssi() en src/ssi.c concatena el argumento de la directiva en una ruta del sistema de archivos sin llamar a mg_path_is_sane(), permitiendo un despliegue de MG_ENABLE_SSI con ssi_pattern configurado para divulgar archivos legibles por el proceso de Mongoose. Este problema est\u00e1 corregido en la versi\u00f3n 7.22."}], "lastModified": "2026-10-18T20:10:00.110", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:cesanta:mongoose:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "455C6F41-72BB-40DA-BF44-9D7C6B0C2EB5", "versionEndExcluding": "7.22"}], "operator": "OR"}]}], "sourceIdentifier": "security-advisories@github.com"}