CVE-2026-26065
CRITICAL
CVSS 9.3
No EPSS data
Description
calibre is a cross-platform e-book manager for viewing, converting, editing, and cataloging e-books. Versions 9.2.1 and below are vulnerable to Path Traversal through PDB readers (both 132-byte and 202-byte header variants) that allow arbitrary file writes with arbitrary extension and arbitrary content anywhere the user has write permissions. Files are written in 'wb' mode, silently overwriting existing files. This can lead to potential code execution and Denial of Service through file corruption. This issue has been fixed in version 9.3.0.
CVSS details
EPSS
This CVE is not currently listed in the EPSS dataset.
Show JSON
{
"cve": {
"id": "CVE-2026-26065",
"cveTags": [],
"metrics": {
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"type": "Primary",
"source": "nvd@nist.gov",
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"scope": "UNCHANGED",
"version": "3.1",
"baseScore": 8.8,
"attackVector": "NETWORK",
"baseSeverity": "HIGH",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
"integrityImpact": "HIGH",
"userInteraction": "NONE",
"attackComplexity": "LOW",
"availabilityImpact": "HIGH",
"privilegesRequired": "LOW",
"confidentialityImpact": "HIGH"
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"exploitabilityScore": 2.8
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"Safety": "NOT_DEFINED",
"version": "4.0",
"Recovery": "NOT_DEFINED",
"baseScore": 9.3,
"Automatable": "NOT_DEFINED",
"attackVector": "LOCAL",
"baseSeverity": "CRITICAL",
"valueDensity": "NOT_DEFINED",
"vectorString": "CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X",
"exploitMaturity": "NOT_DEFINED",
"providerUrgency": "NOT_DEFINED",
"userInteraction": "ACTIVE",
"attackComplexity": "LOW",
"attackRequirements": "NONE",
"privilegesRequired": "NONE",
"subIntegrityImpact": "HIGH",
"vulnIntegrityImpact": "HIGH",
"integrityRequirement": "NOT_DEFINED",
"modifiedAttackVector": "NOT_DEFINED",
"subAvailabilityImpact": "HIGH",
"vulnAvailabilityImpact": "HIGH",
"availabilityRequirement": "NOT_DEFINED",
"modifiedUserInteraction": "NOT_DEFINED",
"modifiedAttackComplexity": "NOT_DEFINED",
"subConfidentialityImpact": "HIGH",
"vulnConfidentialityImpact": "HIGH",
"confidentialityRequirement": "NOT_DEFINED",
"modifiedAttackRequirements": "NOT_DEFINED",
"modifiedPrivilegesRequired": "NOT_DEFINED",
"modifiedSubIntegrityImpact": "NOT_DEFINED",
"modifiedVulnIntegrityImpact": "NOT_DEFINED",
"vulnerabilityResponseEffort": "NOT_DEFINED",
"modifiedSubAvailabilityImpact": "NOT_DEFINED",
"modifiedVulnAvailabilityImpact": "NOT_DEFINED",
"modifiedSubConfidentialityImpact": "NOT_DEFINED",
"modifiedVulnConfidentialityImpact": "NOT_DEFINED"
}
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]
},
"published": "2026-02-20T02:16:53.730",
"references": [
{
"url": "https://github.com/kovidgoyal/calibre/commit/b6da1c3878c06eb1356cb0ec1106cb66e0e9bfb8",
"tags": [
"Patch"
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"source": "security-advisories@github.com"
},
{
"url": "https://github.com/kovidgoyal/calibre/security/advisories/GHSA-vmfh-7mr7-pp2w",
"tags": [
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"Third Party Advisory"
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"source": "security-advisories@github.com"
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],
"vulnStatus": "Analyzed",
"weaknesses": [
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"type": "Primary",
"source": "security-advisories@github.com",
"description": [
{
"lang": "en",
"value": "CWE-22"
}
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}
],
"descriptions": [
{
"lang": "en",
"value": "calibre is a cross-platform e-book manager for viewing, converting, editing, and cataloging e-books. Versions 9.2.1 and below are vulnerable to Path Traversal through PDB readers (both 132-byte and 202-byte header variants) that allow arbitrary file writes with arbitrary extension and arbitrary content anywhere the user has write permissions. Files are written in 'wb' mode, silently overwriting existing files. This can lead to potential code execution and Denial of Service through file corruption. This issue has been fixed in version 9.3.0."
},
{
"lang": "es",
"value": "calibre es un gestor de libros electr\u00f3nicos multiplataforma para visualizar, convertir, editar y catalogar libros electr\u00f3nicos. Las versiones 9.2.1 e inferiores son vulnerables a saltos de ruta a trav\u00e9s de lectores PDB (tanto variantes de cabecera de 132 bytes como de 202 bytes) que permiten escrituras arbitrarias de archivos con extensi\u00f3n y contenido arbitrarios en cualquier lugar donde el usuario tenga permisos de escritura. Los archivos se escriben en modo 'wb', sobrescribiendo silenciosamente los archivos existentes. Esto puede llevar a una posible ejecuci\u00f3n de c\u00f3digo y denegaci\u00f3n de servicio a trav\u00e9s de la corrupci\u00f3n de archivos. Este problema ha sido solucionado en la versi\u00f3n 9.3.0."
}
],
"lastModified": "2026-02-20T16:45:18.507",
"configurations": [
{
"nodes": [
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"negate": false,
"cpeMatch": [
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"criteria": "cpe:2.3:a:calibre-ebook:calibre:*:*:*:*:*:*:*:*",
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"matchCriteriaId": "A324806A-191D-495C-925D-5DF49CCD8447",
"versionEndExcluding": "9.3.0"
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