CVE catalog
CVE-2026-27810
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 Serv
- Severity
- Medium · CVSS 6.4
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N - Published
- Source
- [NVD] · [CVE record]
- EPSS
- 0.24% · Oct 25, 2026
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.
Vulnerable and fixed packages
Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.
| Distribution | Package | Release | Version | Status |
|---|---|---|---|---|
| Debian | calibre | sid | 9.17.0+ds+~1.1.2-1 | fixed |
| Debian | calibre | forky | 9.17.0+ds+~1.1.2-1 | fixed |
| Debian | calibre | trixie | 8.5.0+ds-1+deb13u3 | fixed |
| Debian | calibre | bookworm | 6.13.0+repack-2+deb12u9 | fixed |
| Debian | calibre | bookworm-security | 6.13.0+repack-2+deb12u10 | fixed |
| Cpe | calibre | Not reported | Not reported | vulnerable |
Fixed-version evidence
| Distribution | Package | Type | Release | Fixed version | Urgency | Origin | Bugs |
|---|---|---|---|---|---|---|---|
| Debian | calibre | source | sid | 9.4.0+ds+~0.10.5-1 | not yet assigned | Not reported | Not reported |
| Debian | calibre | source | forky | 9.4.0+ds+~0.10.5-1 | not yet assigned | Not reported | Not reported |
| Debian | calibre | source | trixie | 8.5.0+ds-1+deb13u2 | not yet assigned | Not reported | Not reported |
| Debian | calibre | source | bookworm | 6.13.0+repack-2+deb12u6 | not yet assigned | Not reported | Not reported |
OpenFactory catalog packages
[Debian 12 (Bookworm)]
- [calibre]Fixed
Details (4)
6.13.0+repack-2+deb12u9· all · bookwormFixed · Fixed:
6.13.0+repack-2+deb12u6nvd · calibre · debian · bookworm; nvd · calibre · debian · 12
6.13.0+repack-2+deb12u9· all · bookwormFixed · Fixed:
6.13.0+repack-2+deb12u6nvd · calibre · debian · bookworm; nvd · calibre · debian · 12
6.13.0+repack-2+deb12u10· all · bookworm-securityFixed · Fixed:
6.13.0+repack-2+deb12u6nvd · calibre · debian · bookworm; nvd · calibre · debian · 12
6.13.0+repack-2+deb12u10· all · bookworm-securityFixed · Fixed:
6.13.0+repack-2+deb12u6nvd · calibre · debian · bookworm; nvd · calibre · debian · 12
- [calibre-bin]Fixed
Source package: [calibre]
Details (4)
6.13.0+repack-2+deb12u9· amd64 · bookwormFixed · Fixed:
6.13.0+repack-2+deb12u6nvd · calibre · debian · bookworm; nvd · calibre · debian · 12
6.13.0+repack-2+deb12u9· arm64 · bookwormFixed · Fixed:
6.13.0+repack-2+deb12u6nvd · calibre · debian · bookworm; nvd · calibre · debian · 12
6.13.0+repack-2+deb12u10· amd64 · bookworm-securityFixed · Fixed:
6.13.0+repack-2+deb12u6nvd · calibre · debian · bookworm; nvd · calibre · debian · 12
6.13.0+repack-2+deb12u10· arm64 · bookworm-securityFixed · Fixed:
6.13.0+repack-2+deb12u6nvd · calibre · debian · bookworm; nvd · calibre · debian · 12
[Debian 13 (Trixie)]
- [calibre]Fixed
Details (4)
8.5.0+ds-1+deb13u3· all · trixieFixed · Fixed:
8.5.0+ds-1+deb13u2nvd · calibre · debian · 13
8.5.0+ds-1+deb13u3· all · trixieFixed · Fixed:
8.5.0+ds-1+deb13u2nvd · calibre · debian · 13
8.16.2+ds+~0.10.5-3~bpo13+1· all · trixie-backportsFixed · Fixed:
8.5.0+ds-1+deb13u2nvd · calibre · debian · 13
8.16.2+ds+~0.10.5-3~bpo13+1· all · trixie-backportsFixed · Fixed:
8.5.0+ds-1+deb13u2nvd · calibre · debian · 13
- [calibre-bin]Fixed
Source package: [calibre]
Details (4)
8.5.0+ds-1+deb13u3· amd64 · trixieFixed · Fixed:
8.5.0+ds-1+deb13u2nvd · calibre · debian · 13
8.5.0+ds-1+deb13u3· arm64 · trixieFixed · Fixed:
8.5.0+ds-1+deb13u2nvd · calibre · debian · 13
8.16.2+ds+~0.10.5-3~bpo13+1· amd64 · trixie-backportsFixed · Fixed:
8.5.0+ds-1+deb13u2nvd · calibre · debian · 13
8.16.2+ds+~0.10.5-3~bpo13+1· arm64 · trixie-backportsFixed · Fixed:
8.5.0+ds-1+deb13u2nvd · calibre · debian · 13
Observed:
References
- [https://ftp.suse.com/pub/projects/security/csaf/opensuse-su-2026_10587-1.json]
- [https://nvd.nist.gov/vuln/detail/CVE-2026-27810]
- [https://osv.dev/vulnerability/DEBIAN-CVE-2026-27810]
- [https://security-tracker.debian.org/tracker/CVE-2026-27810]
- [https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-27810.json]
[Debian Security Tracker] · [FIRST EPSS] · [National Vulnerability Database (NVD)] · [OSV Package Vulnerability Database] · [Red Hat security advisories and VEX] · [SUSE security advisories and VEX]