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{"configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:a:calibre-ebook:calibre:*:*:*:*:*:*:*:*", "matchCriteriaId": "973916AB-8FDD-411A-8AA0-F32688DD1C2E", "versionEndExcluding": "9.5.0", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "calibre is a cross-platform e-book manager for viewing, converting, editing, and cataloging e-books. Prior to 9.5.0, a path traversal vulnerability in the RocketBook (.rb) input plugin (src/calibre/ebooks/rb/reader.py) allows an attacker to write arbitrary files to any path writable by the calibre process when a user opens or converts a crafted .rb file. This is the same bug class fixed in CVE-2026-26065 for the PDB readers, but the fix was never applied to the RB reader. This vulnerability is fixed in 9.5.0."}], "id": "CVE-2026-30853", "lastModified": "2026-03-18T14:01:22.710", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "LOW", "baseScore": 5.0, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "LOW", "privilegesRequired": "NONE", "scope": "CHANGED", "userInteraction": "REQUIRED", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:C/C:N/I:L/A:L", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 2.7, "source": "[email protected]", "type": "Secondary"}, {"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": "[email protected]", "type": "Primary"}]}, "published": "2026-03-13T19:54:35.077", "references": [{"source": "[email protected]", "tags": ["Exploit", "Vendor Advisory"], "url": "https://github.com/kovidgoyal/calibre/security/advisories/GHSA-7mp7-rfrg-542x"}], "sourceIdentifier": "[email protected]", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-22"}], "source": "[email protected]", "type": "Primary"}]}

{"bugzilla": {"description": "calibre: Calibre: Arbitrary file write via crafted RocketBook (.rb) file", "id": "2447437", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2447437"}, "csaw": false, "cvss3": {"cvss3_base_score": "5.0", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:C/C:N/I:L/A:L", "status": "draft"}, "cwe": "CWE-22", "details": ["A flaw was found in Calibre, an e-book manager. A path traversal vulnerability in the RocketBook (.rb) input plugin allows an attacker to write arbitrary files to any location accessible by the Calibre process. This can be exploited when a user opens or converts a specially crafted .rb file, potentially leading to information disclosure, denial of service, or arbitrary code execution."], "mitigation": {"lang": "en:us", "value": "To mitigate this issue, users should avoid opening or converting untrusted RocketBook (.rb) files with calibre. Processing untrusted files can lead to arbitrary file writes on the system."}, "name": "CVE-2026-30853", "public_date": "2026-03-13T19:00:09Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-30853\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-30853\nhttps://github.com/kovidgoyal/calibre/security/advisories/GHSA-7mp7-rfrg-542x"], "statement": "This vulnerability has a MODERATE impact. A path traversal flaw in the RocketBook (.rb) input plugin of calibre allows an attacker to write arbitrary files to locations writable by the calibre process. This issue occurs when a user opens or converts a specially crafted .rb file.", "threat_severity": "Moderate"}

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