High
calibre has a path traversal vulnerability
Type: advisorySources: OSV
calibre is a cross-platform e-book manager for viewing, converting, editing, and cataloging e-books. Prior to version 9.6.0, a path traversal vulnerability exists in Calibre' handling of images in Markdown and other similar text-based files allowing an attacker to include arbitrary files from the file system into the converted book. Additionally, missing authentication and server-side request forgery in the background-image endpoint in the ebook reader web view allow the files to be exfiltrated without additional interaction. Version 9.6.0 contains a fix.
- Products
- Not specified
- Affected versions
- Not specified
- Fixed versions
- Not specified
- CVEs
- CVE-2026-33206
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 3 Nov 2026, 15:08 UTC · Revision 1
Source evidence
calibre has a path traversal vulnerability
core-osv · Original sourcePublished 27 Mar 2026, 13:53 UTC
calibre is a cross-platform e-book manager for viewing, converting, editing, and cataloging e-books. Prior to version 9.6.0, a path traversal vulnerability exists in Calibre' handling of images in Markdown and other similar text-based files allowing an attacker to include arbitrary files from the file system into the converted book. Additionally, missing authentication and server-side request forgery in the background-image endpoint in the ebook reader web view allow the files to be exfiltrated without additional interaction. Version 9.6.0 contains a fix.
osv:CVE-2026-33206
Complete source record
{
"id": "8ee6ddead628e17af032ddafb3cd116fc6c1595937e0f8f0bfea0fbe9b0d8a32",
"url": "https://osv.dev/vulnerability/CVE-2026-33206",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "calibre has a path traversal vulnerability",
"summary": "calibre is a cross-platform e-book manager for viewing, converting, editing, and cataloging e-books. Prior to version 9.6.0, a path traversal vulnerability exists in Calibre' handling of images in Markdown and other similar text-based files allowing an attacker to include arbitrary files from the file system into the converted book. Additionally, missing authentication and server-side request forgery in the background-image endpoint in the ebook reader web view allow the files to be exfiltrated without additional interaction. Version 9.6.0 contains a fix.",
"evidence": "osv:CVE-2026-33206",
"products": [],
"severity": "high",
"structured": {
"id": "CVE-2026-33206",
"aliases": [
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"GHSA-h3p4-m74f-43g6"
],
"metrics": [
{
"type": "CVSS_V4",
"score": "CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:H/VI:N/VA:N/SC:H/SI:N/SA:N"
}
],
"affected": [
{
"ranges": [
{
"repo": "https://github.com/kovidgoyal/calibre",
"type": "GIT",
"events": [
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{
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"source": "AFFECTED_FIELD",
"strategy": "StringRangeExpression"
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{
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],
"modified": "2026-10-28T02:30:29.646328069Z",
"provider": "osv",
"references": [
"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/33xxx/CVE-2026-33206.json",
"https://github.com/kovidgoyal/calibre/security/advisories/GHSA-h3p4-m74f-43g6",
"https://nvd.nist.gov/vuln/detail/CVE-2026-33206"
],
"provider_metadata": {
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"cna_assigner": "GitHub_M",
"osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/33xxx/CVE-2026-33206.json"
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"evidence": "/id"
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},
"source_id": "core-osv",
"document_id": 496673,
"published_at": "2026-03-27T13:53:22.833+00:00"
}