CVE-2026-33206

calibre has a path traversal vulnerability

8.2 HighFix available

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.

Attack profile

How easy it is to exploit

Attack vector: Local
Complexity: Low
Privileges needed: None
User interaction: Passive

What an attacker can affect

Confidentiality: High
Integrity: None
Availability: None

Exploit likelihood

0.22%Up 0.2 points since Mar 28, 2026

What each source reports

CVE List Score used 8.2

calibre has a path traversal vulnerability

Record: CVE-2026-33206
CVSS 4.0: 8.2 HighCVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:H/VI:N/VA:N/SC:H/SI:N/SA:N
Weakness: CWE-23
Updated: 2026-11-02

EUVDEUVD-2026-16612 8.2

Record: EUVD-2026-16612
CVSS 4.0: 8.2 HighCVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:H/VI:N/VA:N/SC:H/SI:N/SA:N
Updated: 2026-11-02

NVD 8.2

Record: CVE-2026-33206
CVSS 4.0: 8.2 HighCVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:H/VI:N/VA:N/SC:H/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
CVSS 3.1: 6.3 MediumCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:C/C:H/I:N/A:N
Weakness: CWE-23
Updated: 2026-11-02

OSV 8.2

calibre has a path traversal vulnerability

Record: CVE-2026-33206
CVSS 4.0: 8.2 HighCVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:H/VI:N/VA:N/SC:H/SI:N/SA:N
Weakness: CWE-23
Updated: 2026-11-02

OSVDEBIAN-CVE-2026-33206 6.3

Record: DEBIAN-CVE-2026-33206
CVSS 3.1: 6.3 MediumCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:C/C:H/I:N/A:N
Updated: 2026-11-02

OSVUBUNTU-CVE-2026-33206 8.2

Record: UBUNTU-CVE-2026-33206
CVSS 4.0: 8.2 HighCVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:H/VI:N/VA:N/SC:H/SI:N/SA:N
CVSS 3.1: 6.3 MediumCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:C/C:H/I:N/A:N
Updated: 2026-11-02

OSVopenSUSE-SU-2026:10587-1 No score

calibre-9.7.0-1.1 on GA media

These are all security issues fixed in the calibre-9.7.0-1.1 package on the GA media of openSUSE Tumbleweed.

Record: openSUSE-SU-2026:10587-1
Updated: 2026-11-02

Affected products

Affected packages

Affected packages
Package	Affected	Fixed
`calibre` Debian:12	before 6.13.0+repack-2+deb12u8, plus listed versions 6.13.0+repack-26.13.0+repack-2+deb12u16.13.0+repack-2+deb12u26.13.0+repack-2+deb12u36.13.0+repack-2+deb12u46.13.0+repack-2+deb12u56.13.0+repack-2+deb12u66.13.0+repack-2+deb12u7	6.13.0+repack-2+deb12u8
`calibre` Debian:13	before 8.5.0+ds-1+deb13u3, plus listed versions 8.5.0+ds-18.5.0+ds-1+deb13u18.5.0+ds-1+deb13u2	8.5.0+ds-1+deb13u3
`calibre` Debian:14	before 9.6.0+ds+~0.10.5-1, plus listed versions 8.10.0+ds-18.10.0+ds-28.10.0+ds-38.11.0+ds+~0.10.5-18.11.1+ds+~0.10.5-1 Show 38 moreShow less 8.11.1+ds+~0.10.5-28.11.1+ds+~0.10.5-38.12.0+ds+~0.10.5-18.13.0+ds+~0.10.5-18.13.0+ds+~0.10.5-28.13.0+ds+~0.10.5-38.14.0+ds+~0.10.5-18.14.0+ds+~0.10.5-1~bpo13+18.15.0+ds+~0.10.5-18.15.0+ds+~0.10.5-1~bpo13+18.15.0+ds+~0.10.5-28.16.0+ds+~0.10.5-18.16.0+ds+~0.10.5-28.16.1+ds+~0.10.5-18.16.2+ds+~0.10.5-18.16.2+ds+~0.10.5-28.16.2+ds+~0.10.5-38.16.2+ds+~0.10.5-3~bpo13+18.5.0+ds-18.6.0+ds-18.7.0+ds-18.8.0+ds-18.8.0+ds-28.8.0+ds-2+gcc158.8.0+ds-38.9.0+ds-18.9.0+ds-28.9.0+ds-38.9.0+ds-49.0.0+ds+~0.10.5-19.1.0+ds+~0.10.5-19.2.0+ds+~0.10.5-19.2.1+ds+~0.10.5-19.2.1+ds+~0.10.5-29.3.0+ds+~0.10.5-19.3.1+ds+~0.10.5-19.4.0+ds+~0.10.5-19.5.0+ds+~0.10.5-1	9.6.0+ds+~0.10.5-1
`calibre` Ubuntu:16.04:LTS	All versions, plus listed versions 2.33.0+dfsg-1build12.38.0+dfsg-12.45.0+dfsg-12.45.0+dfsg-1build12.48.0+dfsg-1 Show 4 moreShow less 2.48.0+dfsg-1build12.54.0+dfsg-12.55.0+dfsg-12.55.0+dfsg-1ubuntu0.2	None known
`calibre` Ubuntu:18.04:LTS	All versions, plus listed versions 3.7.0+dfsg-23.7.0+dfsg-2build13.12.0+dfsg-13.13.0+dfsg-13.14.0+dfsg-1 Show 10 moreShow less 3.15.0.1+dfsg-13.16.0+dfsg-13.16.0+dfsg-1build13.17.0+dfsg-13.17.0+dfsg-23.18.0+dfsg-1build13.19.0+dfsg-13.20.0+dfsg-13.21.0+dfsg-13.21.0+dfsg-1build1	None known
`calibre` Ubuntu:20.04:LTS	All versions, plus listed versions 3.46.0+dfsg-14.2.0+dfsg-24.3.0+dfsg-14.3.0+dfsg-24.4.0+dfsg-1 Show 14 moreShow less 4.5.0+dfsg-14.5.0+dfsg-24.5.0+dfsg-34.6.0+dfsg-14.7.0+dfsg-14.99.3+dfsg-24.99.4+dfsg-14.99.4+dfsg-1build14.99.4+dfsg+really4.10.0+py3-24.99.4+dfsg+really4.11.2-14.99.4+dfsg+really4.11.2-1build14.99.4+dfsg+really4.12.0-14.99.4+dfsg+really4.12.0-1build14.99.4+dfsg+really4.12.0-1ubuntu1	None known
`calibre` Ubuntu:22.04:LTS	All versions, plus listed versions 5.25.0+dfsg-25.33.2+dfsg-15.34.0+dfsg-15.35.0+dfsg-1ubuntu25.37.0+dfsg-15.37.0+dfsg-1build1	None known
`calibre` Ubuntu:24.04:LTS	All versions, plus listed versions 6.24.0+ds-16.29.0+ds-17.0.0+ds-17.1.0+ds-17.1.0+ds-2 Show 9 moreShow less 7.2.0+ds-17.2.0+ds-1build17.3.0+ds-17.4.0+ds-17.5.1+ds-17.5.1+ds-27.5.1+ds-37.6.0+ds-17.6.0+ds-1build1	None known
`calibre` Ubuntu:25.10	All versions, plus listed versions 7.26.0+ds-4build18.3.0+ds-18.4.0+ds-18.5.0+ds-18.6.0+ds-1 Show 4 moreShow less 8.7.0+ds-18.8.0+ds-28.8.0+ds-38.8.0+ds-3build1	None known
`calibre` Ubuntu:26.10	All versions, plus listed versions 9.2.1+ds+~0.10.5-2build19.9.0+ds+~0.10.6-19.11.0+ds+~0.10.6-19.11.0+ds+~0.10.6-29.13.0+ds+~0.10.6-19.14.0+ds+~0.10.6-2build1	None known
`calibre` Ubuntu:26.04:LTS	All versions, plus listed versions 8.8.0+ds-3build18.13.0+ds+~0.10.5-38.14.0+ds+~0.10.5-18.15.0+ds+~0.10.5-18.16.0+ds+~0.10.5-2 Show 4 moreShow less 8.16.2+ds+~0.10.5-18.16.2+ds+~0.10.5-28.16.2+ds+~0.10.5-39.2.1+ds+~0.10.5-2build1	None known
`calibre` openSUSE:Tumbleweed From an advisory covering 10 CVEs	before 9.7.0-1.1	9.7.0-1.1

History

History
Recorded	Changed	Sources
Nov 6, 2026	affected, facts
Nov 2, 2026	first indexed	CVE List, EUVD, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2026-33206 is a high vulnerability (CVSS 8.2) in Calibre-ebook Calibre, published March 27, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.22%, the 12th percentile. Fixed in calibre 6.13.0+repack-2+deb12u8.

References

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