Medium
calibre Vulnerable to HTTP Response Header Injection
Type: advisorySources: OSV
calibre is a cross-platform e-book manager for viewing, converting, editing, and cataloging e-books. Prior to version 9.4.0, an HTTP Response Header Injection vulnerability in the calibre Content Server allows any authenticated user to inject arbitrary HTTP headers into server responses via an unsanitized `content_disposition` query parameter in the `/get/` and `/data-files/get/` endpoints. All users running the calibre Content Server with authentication enabled are affected. The vulnerability is exploitable by any authenticated user and can also be triggered by tricking an authenticated victim into clicking a crafted link. Version 9.4.0 contains a fix for the issue.
- Products
- Not specified
- Affected versions
- Not specified
- Fixed versions
- Not specified
- CVEs
- CVE-2026-27810
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 2 Nov 2026, 18:38 UTC · Revision 1
Source evidence
calibre Vulnerable to HTTP Response Header Injection
core-osv · Original sourcePublished 27 Feb 2026, 19:44 UTC
calibre is a cross-platform e-book manager for viewing, converting, editing, and cataloging e-books. Prior to version 9.4.0, an HTTP Response Header Injection vulnerability in the calibre Content Server allows any authenticated user to inject arbitrary HTTP headers into server responses via an unsanitized `content_disposition` query parameter in the `/get/` and `/data-files/get/` endpoints. All users running the calibre Content Server with authentication enabled are affected. The vulnerability is exploitable by any authenticated user and can also be triggered by tricking an authenticated victim into clicking a crafted link. Version 9.4.0 contains a fix for the issue.
osv:CVE-2026-27810
Complete source record
{
"id": "c2eab2764996532b331f6a5055b0899cd1a00e05169ba904050fbdca85bfcf71",
"url": "https://osv.dev/vulnerability/CVE-2026-27810",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "calibre Vulnerable to HTTP Response Header Injection",
"summary": "calibre is a cross-platform e-book manager for viewing, converting, editing, and cataloging e-books. Prior to version 9.4.0, an HTTP Response Header Injection vulnerability in the calibre Content Server allows any authenticated user to inject arbitrary HTTP headers into server responses via an unsanitized `content_disposition` query parameter in the `/get/` and `/data-files/get/` endpoints. All users running the calibre Content Server with authentication enabled are affected. The vulnerability is exploitable by any authenticated user and can also be triggered by tricking an authenticated victim into clicking a crafted link. Version 9.4.0 contains a fix for the issue.",
"evidence": "osv:CVE-2026-27810",
"products": [],
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"modified": "2026-10-28T02:30:22.411481561Z",
"provider": "osv",
"references": [
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"https://github.com/kovidgoyal/calibre/security/advisories/GHSA-5fpj-fxw7-8grw",
"https://nvd.nist.gov/vuln/detail/CVE-2026-27810"
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"source_id": "core-osv",
"document_id": 488669,
"published_at": "2026-02-27T19:44:39.106+00:00"
}