Kovidgoyal Calibre vulnerabilities

CVE-2026-33206 [HIGH] CWE-23 CVE-2026-33206: calibre is a cross-platform e-book manager for viewing, converting, editing, and cataloging e-books. 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, missi

CVE-2026-33205 [MEDIUM] CWE-918 CVE-2026-33205: calibre is a cross-platform e-book manager for viewing, converting, editing, and cataloging e-books. calibre is a cross-platform e-book manager for viewing, converting, editing, and cataloging e-books. Prior to version 9.6.0, a Server-Side Request Forgery vulnerability in the background-image endpoint of calibre e-book reader's web view allows an attacker to perform blind GET requests to arbitrary URLs and exfiltrate information out from the ebook

CVE-2026-27824 [MEDIUM] CWE-307 CVE-2026-27824: calibre is a cross-platform e-book manager for viewing, converting, editing, and cataloging e-books. 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 a

CVE-2026-27810 [MEDIUM] CWE-113 CVE-2026-27810: calibre is a cross-platform e-book manager for viewing, converting, editing, and cataloging e-books. 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

CVE-2026-26064 [CRITICAL] CWE-22 CVE-2026-26064: calibre is a cross-platform e-book manager for viewing, converting, editing, and cataloging e-books. 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

CVE-2026-26065 [CRITICAL] CWE-22 CVE-2026-26065: calibre is a cross-platform e-book manager for viewing, converting, editing, and cataloging e-books. 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

CVE-2026-25731 [HIGH] CWE-1336 CVE-2026-25731: calibre is an e-book manager. Prior to 9.2.0, a Server-Side Template Injection (SSTI) vulnerability 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.

CVE-2026-25635 [HIGH] CWE-22 CVE-2026-25635: calibre is an e-book manager. Prior to 9.2.0, Calibre's CHM reader contains a path traversal vulnera 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 vulnerabili

CVE-2026-25636 [HIGH] CWE-22 CVE-2026-25636: calibre is an e-book manager. In 9.1.0 and earlier, a path traversal vulnerability in Calibre's EPUB 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 m

CVE-2025-64486 [CRITICAL] CWE-73 CVE-2025-64486: calibre is an e-book manager. In versions 8.13.0 and prior, calibre does not validate filenames when 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