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CVE-2026-25636— calibre has a Path Traversal Leading to Arbitrary File Corruption and Code Execution

Quick assessment

Affected
kovidgoyal calibre
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Calibre是印度Kovid Goyal个人开发者的一个开源免费的全能电子书阅读管理与格式转换工具。 Calibre 9.1.0及之前版本存在代码注入漏洞，该漏洞源于EPUB转换过程中存在路径遍历，可能允许恶意EPUB文件损坏Calibre进程可写的任意现有文件。

CVSS 8.2 · High EPSS 0.16% · P4
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I. Basic Information for CVE-2026-25636

Vulnerability Information
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Vulnerability Title
calibre has a Path Traversal Leading to Arbitrary File Corruption and Code Execution
Source: CVE Program / CVE List V5
Vulnerability Description
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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:C/C:N/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
对路径名的限制不恰当(路径遍历)
Source: CVE Program / CVE List V5
Vulnerability Title
Calibre 代码注入漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Calibre是印度Kovid Goyal个人开发者的一个开源免费的全能电子书阅读管理与格式转换工具。 Calibre 9.1.0及之前版本存在代码注入漏洞，该漏洞源于EPUB转换过程中存在路径遍历，可能允许恶意EPUB文件损坏Calibre进程可写的任意现有文件。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
kovidgoyal calibre < 9.2.0 -

II. Public POCs for CVE-2026-25636

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III. Intelligence Information for CVE-2026-25636

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Vendor Advisories for CVE-2026-25636 (1)

Same Patch Batch · kovidgoyal · 2026-02-06 · 3 CVEs total

CVE-2026-25635 8.6 HIGH calibre has a Path Traversal Leading to Arbitrary File Write and Potential Code Execution
CVE-2026-25731 7.8 HIGH Calibre Affected by Arbitrary Code Execution via Server-Side Template Injection in Calibre

IV. Related Vulnerabilities

Same product: calibre
Same vendor: kovidgoyal
Same weakness: CWE-22

V. Comments for CVE-2026-25636

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