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8 vulnerabilities found for calibre by kovidgoyal

CVE-2026-25731 (GCVE-0-2026-25731)

Vulnerability from nvd – Published: 2026-02-06 20:14 – Updated: 2026-02-06 21:02
VLAI?
Title
Calibre Affected by Arbitrary Code Execution via Server-Side Template Injection in Calibre HTML Export
Summary
calibre is an e-book manager. Prior to 9.2.0, a Server-Side Template Injection (SSTI) vulnerability in Calibre's Templite templating engine allows arbitrary code execution when a user converts an ebook using a malicious custom template file via the --template-html or --template-html-index command-line options. This vulnerability is fixed in 9.2.0.
Severity ?
7.8 (High)
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
CWE
  • CWE-1336 - Improper Neutralization of Special Elements Used in a Template Engine
Assigner
References
Impacted products
Vendor Product Version
kovidgoyal calibre Affected: < 9.2.0
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Show details on NVD website
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CVE-2026-25636 (GCVE-0-2026-25636)

Vulnerability from nvd – Published: 2026-02-06 20:07 – Updated: 2026-02-06 20:07
VLAI?
Title
calibre has a Path Traversal Leading to Arbitrary File Corruption and Code Execution
Summary
calibre is an e-book manager. In 9.1.0 and earlier, a path traversal vulnerability in Calibre's EPUB conversion allows a malicious EPUB file to corrupt arbitrary existing files writable by the Calibre process. During conversion, Calibre resolves CipherReference URI from META-INF/encryption.xml to an absolute filesystem path and opens it in read-write mode, even when it points outside the conversion extraction directory. This vulnerability is fixed in 9.2.0.
Severity ?
8.2 (High)
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:C/C:N/I:H/A:H
CWE
  • CWE-22 - Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
  • CWE-73 - External Control of File Name or Path
  • CWE-94 - Improper Control of Generation of Code ('Code Injection')
Assigner
References
Impacted products
Vendor Product Version
kovidgoyal calibre Affected: < 9.2.0
Create a notification for this product.
Show details on NVD website
To clipboard 

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CVE-2026-25635 (GCVE-0-2026-25635)

Vulnerability from nvd – Published: 2026-02-06 20:10 – Updated: 2026-02-06 20:10
VLAI?
Title
calibre has a Path Traversal Leading to Arbitrary File Write and Potential Code Execution
Summary
calibre is an e-book manager. Prior to 9.2.0, Calibre's CHM reader contains a path traversal vulnerability that allows arbitrary file writes anywhere the user has write permissions. On Windows (haven't tested on other OS's), this can lead to Remote Code Execution by writing a payload to the Startup folder, which executes on next login. This vulnerability is fixed in 9.2.0.
Severity ?
8.6 (High)
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H
CWE
  • CWE-22 - Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
Assigner
References
Impacted products
Vendor Product Version
kovidgoyal calibre Affected: < 9.2.0
Create a notification for this product.
Show details on NVD website
To clipboard 

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CVE-2025-64486 (GCVE-0-2025-64486)

Vulnerability from nvd – Published: 2025-11-07 23:25 – Updated: 2025-11-13 21:34
VLAI?
Title
calibre is vulnerable to arbitrary code execution when opening FB2 files
Summary
calibre is an e-book manager. In versions 8.13.0 and prior, calibre does not validate filenames when handling binary assets in FB2 files, allowing an attacker to write arbitrary files on the filesystem when viewing or converting a malicious FictionBook file. This can be leveraged to achieve arbitrary code execution. This issue is fixed in version 8.14.0.
Severity ?
9.3 (Critical)
CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H
CWE
  • CWE-73 - External Control of File Name or Path
Assigner
References
Impacted products
Vendor Product Version
kovidgoyal calibre Affected: < 8.14.0
Create a notification for this product.
Show details on NVD website
To clipboard 

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CVE-2026-25731 (GCVE-0-2026-25731)

Vulnerability from cvelistv5 – Published: 2026-02-06 20:14 – Updated: 2026-02-06 21:02
VLAI?
Title
Calibre Affected by Arbitrary Code Execution via Server-Side Template Injection in Calibre HTML Export
Summary
calibre is an e-book manager. Prior to 9.2.0, a Server-Side Template Injection (SSTI) vulnerability in Calibre's Templite templating engine allows arbitrary code execution when a user converts an ebook using a malicious custom template file via the --template-html or --template-html-index command-line options. This vulnerability is fixed in 9.2.0.
Severity ?
7.8 (High)
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
CWE
  • CWE-1336 - Improper Neutralization of Special Elements Used in a Template Engine
Assigner
References
Impacted products
Vendor Product Version
kovidgoyal calibre Affected: < 9.2.0
Create a notification for this product.
Show details on NVD website
To clipboard 

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      "title": "Calibre Affected by Arbitrary Code Execution via Server-Side Template Injection in Calibre HTML Export"
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CVE-2026-25635 (GCVE-0-2026-25635)

Vulnerability from cvelistv5 – Published: 2026-02-06 20:10 – Updated: 2026-02-06 20:10
VLAI?
Title
calibre has a Path Traversal Leading to Arbitrary File Write and Potential Code Execution
Summary
calibre is an e-book manager. Prior to 9.2.0, Calibre's CHM reader contains a path traversal vulnerability that allows arbitrary file writes anywhere the user has write permissions. On Windows (haven't tested on other OS's), this can lead to Remote Code Execution by writing a payload to the Startup folder, which executes on next login. This vulnerability is fixed in 9.2.0.
Severity ?
8.6 (High)
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H
CWE
  • CWE-22 - Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
Assigner
References
Impacted products
Vendor Product Version
kovidgoyal calibre Affected: < 9.2.0
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Show details on NVD website
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CVE-2026-25636 (GCVE-0-2026-25636)

Vulnerability from cvelistv5 – Published: 2026-02-06 20:07 – Updated: 2026-02-06 20:07
VLAI?
Title
calibre has a Path Traversal Leading to Arbitrary File Corruption and Code Execution
Summary
calibre is an e-book manager. In 9.1.0 and earlier, a path traversal vulnerability in Calibre's EPUB conversion allows a malicious EPUB file to corrupt arbitrary existing files writable by the Calibre process. During conversion, Calibre resolves CipherReference URI from META-INF/encryption.xml to an absolute filesystem path and opens it in read-write mode, even when it points outside the conversion extraction directory. This vulnerability is fixed in 9.2.0.
Severity ?
8.2 (High)
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:C/C:N/I:H/A:H
CWE
  • CWE-22 - Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
  • CWE-73 - External Control of File Name or Path
  • CWE-94 - Improper Control of Generation of Code ('Code Injection')
Assigner
References
Impacted products
Vendor Product Version
kovidgoyal calibre Affected: < 9.2.0
Create a notification for this product.
Show details on NVD website
To clipboard 

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CVE-2025-64486 (GCVE-0-2025-64486)

Vulnerability from cvelistv5 – Published: 2025-11-07 23:25 – Updated: 2025-11-13 21:34
VLAI?
Title
calibre is vulnerable to arbitrary code execution when opening FB2 files
Summary
calibre is an e-book manager. In versions 8.13.0 and prior, calibre does not validate filenames when handling binary assets in FB2 files, allowing an attacker to write arbitrary files on the filesystem when viewing or converting a malicious FictionBook file. This can be leveraged to achieve arbitrary code execution. This issue is fixed in version 8.14.0.
Severity ?
9.3 (Critical)
CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H
CWE
  • CWE-73 - External Control of File Name or Path
Assigner
References
Impacted products
Vendor Product Version
kovidgoyal calibre Affected: < 8.14.0
Create a notification for this product.
Show details on NVD website
To clipboard 

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