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10 vulnerabilities by kovidgoyal
CVE-2026-27824 (GCVE-0-2026-27824)
Vulnerability from cvelistv5 – Published: 2026-02-27 19:46 – Updated: 2026-03-02 12:54
VLAI?
Title
calibre has IP Ban Bypass via X-Forwarded-For Header Spoofing
Summary
calibre is a cross-platform e-book manager for viewing, converting, editing, and cataloging e-books. Prior to version 9.4.0, the calibre Content Server's brute-force protection mechanism uses a ban key derived from both `remote_addr` and the `X-Forwarded-For` header. Since the `X-Forwarded-For` header is read directly from the HTTP request without any validation or trusted-proxy configuration, an attacker can bypass IP-based bans by simply changing or adding this header, rendering the brute-force protection completely ineffective. This is particularly dangerous for calibre servers exposed to the internet, where brute-force protection is the primary defense against credential stuffing and password guessing attacks. Version 9.4.0 contains a fix for the issue.
Severity ?
5.3 (Medium)
CWE
Assigner
References
| URL | Tags | ||||
|---|---|---|---|---|---|
|
|||||
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| kovidgoyal | calibre |
Affected:
< 9.4.0
|
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CVE-2026-27810 (GCVE-0-2026-27810)
Vulnerability from cvelistv5 – Published: 2026-02-27 19:44 – Updated: 2026-03-02 12:53
VLAI?
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.
Severity ?
6.4 (Medium)
CWE
- CWE-113 - Improper Neutralization of CRLF Sequences in HTTP Headers ('HTTP Request/Response Splitting')
Assigner
References
| URL | Tags | ||||
|---|---|---|---|---|---|
|
|||||
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| kovidgoyal | calibre |
Affected:
< 9.4.0
|
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CVE-2026-26065 (GCVE-0-2026-26065)
Vulnerability from cvelistv5 – Published: 2026-02-20 01:54 – Updated: 2026-02-20 16:41
VLAI?
Title
calibre: Path Traversal can Lead to Arbitrary File Write and Potential Code Execution
Summary
calibre is a cross-platform e-book manager for viewing, converting, editing, and cataloging e-books. Versions 9.2.1 and below are vulnerable to Path Traversal through PDB readers (both 132-byte and 202-byte header variants) that allow arbitrary file writes with arbitrary extension and arbitrary content anywhere the user has write permissions. Files are written in 'wb' mode, silently overwriting existing files. This can lead to potential code execution and Denial of Service through file corruption. This issue has been fixed in version 9.3.0.
Severity ?
CWE
- CWE-22 - Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
Assigner
References
| URL | Tags | |||||||
|---|---|---|---|---|---|---|---|---|
|
||||||||
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| kovidgoyal | calibre |
Affected:
< 9.3.0
|
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CVE-2026-26064 (GCVE-0-2026-26064)
Vulnerability from cvelistv5 – Published: 2026-02-20 01:44 – Updated: 2026-02-20 15:34
VLAI?
Title
calibre: Path Traversal Vulnerability Enables Arbitrary File Write and Remote Code Execution
Summary
calibre is a cross-platform e-book manager for viewing, converting, editing, and cataloging e-books. Versions 9.2.1 and below contain a Path Traversal vulnerability that allows arbitrary file writes anywhere the user has write permissions. On Windows, this leads to Remote Code Execution by writing a payload to the Startup folder, which executes on next login. Function extract_pictures only checks startswith('Pictures'), and does not sanitize '..' sequences. calibre's own ZipFile.extractall() in utils/zipfile.py does sanitize '..' via _get_targetpath(), but extract_pictures() bypasses this by using manual zf.read() + open(). This issue has been fixed in version 9.3.0.
Severity ?
CWE
- CWE-22 - Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
Assigner
References
| URL | Tags | |||||||
|---|---|---|---|---|---|---|---|---|
|
||||||||
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| kovidgoyal | calibre |
Affected:
< 9.3.0
|
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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)
CWE
- CWE-1336 - Improper Neutralization of Special Elements Used in a Template Engine
Assigner
References
| URL | Tags | |||||||
|---|---|---|---|---|---|---|---|---|
|
||||||||
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| kovidgoyal | calibre |
Affected:
< 9.2.0
|
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CVE-2026-25635 (GCVE-0-2026-25635)
Vulnerability from cvelistv5 – Published: 2026-02-06 20:10 – Updated: 2026-02-11 14:54
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)
CWE
- CWE-22 - Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
Assigner
References
| URL | Tags | |||||||
|---|---|---|---|---|---|---|---|---|
|
||||||||
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| kovidgoyal | calibre |
Affected:
< 9.2.0
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CVE-2026-25636 (GCVE-0-2026-25636)
Vulnerability from cvelistv5 – Published: 2026-02-06 20:07 – Updated: 2026-02-11 14:51
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)
CWE
Assigner
References
| URL | Tags | |||||||
|---|---|---|---|---|---|---|---|---|
|
||||||||
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| kovidgoyal | calibre |
Affected:
< 9.2.0
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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 ?
CWE
- CWE-73 - External Control of File Name or Path
Assigner
References
| URL | Tags | |||||||
|---|---|---|---|---|---|---|---|---|
|
||||||||
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| kovidgoyal | calibre |
Affected:
< 8.14.0
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CVE-2025-43929 (GCVE-0-2025-43929)
Vulnerability from cvelistv5 – Published: 2025-04-20 00:00 – Updated: 2025-04-21 13:49
VLAI?
Summary
open_actions.py in kitty before 0.41.0 does not ask for user confirmation before running a local executable file that may have been linked from an untrusted document (e.g., a document opened in KDE ghostwriter).
Severity ?
4.1 (Medium)
CWE
- CWE-346 - Origin Validation Error
Assigner
References
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| kitty project | kitty |
Affected:
0 , < 0.41.0
(semver)
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CVE-2020-35605 (GCVE-0-2020-35605)
Vulnerability from cvelistv5 – Published: 2020-12-21 19:07 – Updated: 2024-08-04 17:09
VLAI?
Summary
The Graphics Protocol feature in graphics.c in kitty before 0.19.3 allows remote attackers to execute arbitrary code because a filename containing special characters can be included in an error message.
Severity ?
No CVSS data available.
CWE
- n/a
Assigner
References
| URL | Tags | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
|
|||||||||||
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