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CVE-2026-27810

CVE-2026-27810 · calibre Vulnerable to HTTP Response Header Injection

This page contains facts from public vulnerability sources. Check the original advisory before updating.

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.

CVSS 6.4 · Medium · EPSS 0.2% · Fix available

Published
Updated

Stack: system

Affected products and versions

  • calibre

    Versions
    • < 9.4.0: Affected

    No fix published

  • calibre Debian:12

    Versions
    • 6.13.0+repack-2
    • 6.13.0+repack-2+deb12u1
    • 6.13.0+repack-2+deb12u2
    • 6.13.0+repack-2+deb12u3
    • 6.13.0+repack-2+deb12u4
    • 6.13.0+repack-2+deb12u5
    Affected ranges
    • ECOSYSTEM: < 6.13.0+repack-2+deb12u6

    Update to 6.13.0+repack-2+deb12u6

  • calibre Debian:13

    Versions
    • 8.5.0+ds-1
    • 8.5.0+ds-1+deb13u1
    Affected ranges
    • ECOSYSTEM: < 8.5.0+ds-1+deb13u2

    Update to 8.5.0+ds-1+deb13u2

  • calibre Debian:14

    Versions
    • 8.10.0+ds-1
    • 8.10.0+ds-2
    • 8.10.0+ds-3
    • 8.11.0+ds+~0.10.5-1
    • 8.11.1+ds+~0.10.5-1
    • 8.11.1+ds+~0.10.5-2
    • 8.11.1+ds+~0.10.5-3
    • 8.12.0+ds+~0.10.5-1
    • 8.13.0+ds+~0.10.5-1
    • 8.13.0+ds+~0.10.5-2
    • 8.13.0+ds+~0.10.5-3
    • 8.14.0+ds+~0.10.5-1
    • 8.14.0+ds+~0.10.5-1~bpo13+1
    • 8.15.0+ds+~0.10.5-1
    • 8.15.0+ds+~0.10.5-1~bpo13+1
    • 8.15.0+ds+~0.10.5-2
    • 8.16.0+ds+~0.10.5-1
    • 8.16.0+ds+~0.10.5-2
    • 8.16.1+ds+~0.10.5-1
    • 8.16.2+ds+~0.10.5-1
    • 8.16.2+ds+~0.10.5-2
    • 8.16.2+ds+~0.10.5-3
    • 8.16.2+ds+~0.10.5-3~bpo13+1
    • 8.5.0+ds-1
    • 8.6.0+ds-1
    • 8.7.0+ds-1
    • 8.8.0+ds-1
    • 8.8.0+ds-2
    • 8.8.0+ds-2+gcc15
    • 8.8.0+ds-3
    • 8.9.0+ds-1
    • 8.9.0+ds-2
    • 8.9.0+ds-3
    • 8.9.0+ds-4
    • 9.0.0+ds+~0.10.5-1
    • 9.1.0+ds+~0.10.5-1
    • 9.2.0+ds+~0.10.5-1
    • 9.2.1+ds+~0.10.5-1
    • 9.2.1+ds+~0.10.5-2
    • 9.3.0+ds+~0.10.5-1
    • 9.3.1+ds+~0.10.5-1
    Affected ranges
    • ECOSYSTEM: < 9.4.0+ds+~0.10.5-1

    Update to 9.4.0+ds+~0.10.5-1

  • calibre Ubuntu:16.04:LTS

    Versions
    • 2.33.0+dfsg-1build1
    • 2.38.0+dfsg-1
    • 2.45.0+dfsg-1
    • 2.45.0+dfsg-1build1
    • 2.48.0+dfsg-1
    • 2.48.0+dfsg-1build1
    • 2.54.0+dfsg-1
    • 2.55.0+dfsg-1
    • 2.55.0+dfsg-1ubuntu0.2
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • calibre Ubuntu:18.04:LTS

    Versions
    • 3.7.0+dfsg-2
    • 3.7.0+dfsg-2build1
    • 3.12.0+dfsg-1
    • 3.13.0+dfsg-1
    • 3.14.0+dfsg-1
    • 3.15.0.1+dfsg-1
    • 3.16.0+dfsg-1
    • 3.16.0+dfsg-1build1
    • 3.17.0+dfsg-1
    • 3.17.0+dfsg-2
    • 3.18.0+dfsg-1build1
    • 3.19.0+dfsg-1
    • 3.20.0+dfsg-1
    • 3.21.0+dfsg-1
    • 3.21.0+dfsg-1build1
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • calibre Ubuntu:20.04:LTS

    Versions
    • 3.46.0+dfsg-1
    • 4.2.0+dfsg-2
    • 4.3.0+dfsg-1
    • 4.3.0+dfsg-2
    • 4.4.0+dfsg-1
    • 4.5.0+dfsg-1
    • 4.5.0+dfsg-2
    • 4.5.0+dfsg-3
    • 4.6.0+dfsg-1
    • 4.7.0+dfsg-1
    • 4.99.3+dfsg-2
    • 4.99.4+dfsg-1
    • 4.99.4+dfsg-1build1
    • 4.99.4+dfsg+really4.10.0+py3-2
    • 4.99.4+dfsg+really4.11.2-1
    • 4.99.4+dfsg+really4.11.2-1build1
    • 4.99.4+dfsg+really4.12.0-1
    • 4.99.4+dfsg+really4.12.0-1build1
    • 4.99.4+dfsg+really4.12.0-1ubuntu1
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • calibre Ubuntu:22.04:LTS

    Versions
    • 5.25.0+dfsg-2
    • 5.33.2+dfsg-1
    • 5.34.0+dfsg-1
    • 5.35.0+dfsg-1ubuntu2
    • 5.37.0+dfsg-1
    • 5.37.0+dfsg-1build1
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • calibre Ubuntu:24.04:LTS

    Versions
    • 6.24.0+ds-1
    • 6.29.0+ds-1
    • 7.0.0+ds-1
    • 7.1.0+ds-1
    • 7.1.0+ds-2
    • 7.2.0+ds-1
    • 7.2.0+ds-1build1
    • 7.3.0+ds-1
    • 7.4.0+ds-1
    • 7.5.1+ds-1
    • 7.5.1+ds-2
    • 7.5.1+ds-3
    • 7.6.0+ds-1
    • 7.6.0+ds-1build1
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • calibre Ubuntu:25.10

    Versions
    • 7.26.0+ds-4build1
    • 8.3.0+ds-1
    • 8.4.0+ds-1
    • 8.5.0+ds-1
    • 8.6.0+ds-1
    • 8.7.0+ds-1
    • 8.8.0+ds-2
    • 8.8.0+ds-3
    • 8.8.0+ds-3build1
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • calibre Ubuntu:26.10

    Versions
    • 9.2.1+ds+~0.10.5-2build1
    • 9.9.0+ds+~0.10.6-1
    • 9.11.0+ds+~0.10.6-1
    • 9.11.0+ds+~0.10.6-2
    • 9.13.0+ds+~0.10.6-1
    • 9.14.0+ds+~0.10.6-2build1
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • calibre Ubuntu:26.04:LTS

    Versions
    • 8.8.0+ds-3build1
    • 8.13.0+ds+~0.10.5-3
    • 8.14.0+ds+~0.10.5-1
    • 8.15.0+ds+~0.10.5-1
    • 8.16.0+ds+~0.10.5-2
    • 8.16.2+ds+~0.10.5-1
    • 8.16.2+ds+~0.10.5-2
    • 8.16.2+ds+~0.10.5-3
    • 9.2.1+ds+~0.10.5-2build1
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

Original sources

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