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{"configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:a:calibre-ebook:calibre:*:*:*:*:*:*:*:*", "matchCriteriaId": "264BDA56-70BE-4FCE-96AD-7F9D1BA0FB54", "versionEndExcluding": "9.2.0", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "calibre is an e-book manager. In 9.1.0 and earlier, a path traversal vulnerability in Calibre's EPUB conversion allows a malicious EPUB file to corrupt arbitrary existing files writable by the Calibre process. During conversion, Calibre resolves CipherReference URI from META-INF/encryption.xml to an absolute filesystem path and opens it in read-write mode, even when it points outside the conversion extraction directory. This vulnerability is fixed in 9.2.0."}, {"lang": "es", "value": "calibre es un gestor de libros electr\u00f3nicos. En 9.1.0 y versiones anteriores, una vulnerabilidad de salto de ruta en la conversi\u00f3n de EPUB de Calibre permite que un archivo EPUB malicioso corrompa archivos existentes arbitrarios escribibles por el proceso de Calibre. Durante la conversi\u00f3n, Calibre resuelve la URI de CipherReference de META-INF/encryption.xml a una ruta de sistema de archivos absoluta y lo abre en modo de lectura-escritura, incluso cuando apunta fuera del directorio de extracci\u00f3n de la conversi\u00f3n. Esta vulnerabilidad est\u00e1 corregida en 9.2.0."}], "id": "CVE-2026-25636", "lastModified": "2026-02-17T21:23:11.340", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 8.2, "baseSeverity": "HIGH", "confidentialityImpact": "NONE", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "CHANGED", "userInteraction": "REQUIRED", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:C/C:N/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 5.8, "source": "security-advisories@github.com", "type": "Secondary"}, {"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 7.8, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "REQUIRED", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 5.9, "source": "nvd@nist.gov", "type": "Primary"}]}, "published": "2026-02-06T21:16:18.833", "references": [{"source": "security-advisories@github.com", "tags": ["Patch"], "url": "https://github.com/kovidgoyal/calibre/commit/9484ea82c6ab226c18e6ca5aa000fa16de598726"}, {"source": "security-advisories@github.com", "tags": ["Exploit", "Third Party Advisory"], "url": "https://github.com/kovidgoyal/calibre/security/advisories/GHSA-8r26-m7j5-hm29"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Exploit", "Third Party Advisory"], "url": "https://0x5t.raptx.org/posts/calibre-epub-rce"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-22"}, {"lang": "en", "value": "CWE-73"}, {"lang": "en", "value": "CWE-94"}], "source": "security-advisories@github.com", "type": "Secondary"}, {"description": [{"lang": "en", "value": "CWE-22"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"bugzilla": {"description": "calibre: Calibre: Arbitrary file corruption via path traversal in EPUB conversion", "id": "2437730", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2437730"}, "csaw": false, "cvss3": {"cvss3_base_score": "8.2", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:C/C:N/I:H/A:H", "status": "draft"}, "details": ["calibre is an e-book manager. In 9.1.0 and earlier, a path traversal vulnerability in Calibre's EPUB conversion allows a malicious EPUB file to corrupt arbitrary existing files writable by the Calibre process. During conversion, Calibre resolves CipherReference URI from META-INF/encryption.xml to an absolute filesystem path and opens it in read-write mode, even when it points outside the conversion extraction directory. This vulnerability is fixed in 9.2.0.", "A flaw was found in Calibre, an e-book manager. This path traversal vulnerability allows a malicious EPUB (electronic publication) file to corrupt arbitrary files on the system that the Calibre process has write access to. During EPUB conversion, Calibre incorrectly resolves file paths, enabling an attacker to write to locations outside the intended conversion directory. This can lead to significant data integrity issues and potential denial of service."], "mitigation": {"lang": "en:us", "value": "To mitigate this issue, users should avoid processing untrusted EPUB files with Calibre. If Calibre is not required, consider removing the package to eliminate the attack surface."}, "name": "CVE-2026-25636", "public_date": "2026-02-06T20:07:40Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-25636\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-25636\nhttps://github.com/kovidgoyal/calibre/commit/9484ea82c6ab226c18e6ca5aa000fa16de598726\nhttps://github.com/kovidgoyal/calibre/security/advisories/GHSA-8r26-m7j5-hm29"], "statement": "This IMPORTANT vulnerability in Calibre allows a malicious EPUB file to corrupt arbitrary files and potentially execute code due to a path traversal flaw during EPUB conversion. This affects Calibre versions 9.1.0 and earlier, including those shipped in Red Hat Community Projects like Fedora 42 and 43. Exploitation requires processing a specially crafted EPUB file.", "threat_severity": "Important"}

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