Medium
calibre has a Path Traversal Leading to Arbitrary File Write
Type: advisorySources: OSV
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.
- Products
- Not specified
- Affected versions
- Not specified
- Fixed versions
- Not specified
- CVEs
- CVE-2026-30853
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 3 Nov 2026, 07:19 UTC · Revision 1
Source evidence
calibre has a Path Traversal Leading to Arbitrary File Write
core-osv · Original sourcePublished 13 Mar 2026, 19:00 UTC
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.
osv:CVE-2026-30853
Complete source record
{
"id": "44c4a7f0476badebf0bd7af1468f14d4b145040a6dbd0253caacc589f7342811",
"url": "https://osv.dev/vulnerability/CVE-2026-30853",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "calibre has a Path Traversal Leading to Arbitrary File Write",
"summary": "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.",
"evidence": "osv:CVE-2026-30853",
"products": [],
"severity": "medium",
"structured": {
"id": "CVE-2026-30853",
"aliases": [
"CVE-2026-30853",
"GHSA-7mp7-rfrg-542x"
],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:C/C:N/I:L/A:L"
}
],
"affected": [
{
"ranges": [
{
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"type": "GIT",
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},
{
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"source": "AFFECTED_FIELD",
"strategy": "StringRangeExpression"
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{
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],
"modified": "2026-10-28T02:30:26.856363907Z",
"provider": "osv",
"references": [
"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/30xxx/CVE-2026-30853.json",
"https://github.com/kovidgoyal/calibre/security/advisories/GHSA-7mp7-rfrg-542x",
"https://nvd.nist.gov/vuln/detail/CVE-2026-30853"
],
"provider_metadata": {
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"cna_assigner": "GitHub_M",
"osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/30xxx/CVE-2026-30853.json"
}
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"evidence": "/id"
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"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 493357,
"published_at": "2026-03-13T19:00:09.925+00:00"
}