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CVE-2026-7709— janeczku Calibre-Web Endpoint kobo_auth.py generate_auth_token improper authorization

Quick assessment

Affected
janeczku Calibre-Web
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-Web是Jan B个人开发者的一款用于浏览、阅读和下载Calibre数据库中电子书的Web应用程序。 Calibre-Web 0.6.26及之前版本存在安全漏洞，该漏洞源于组件Endpoint中文件cps/kobo_auth.py的函数generate_auth_token对参数user_id的操作，可能导致授权不当。

CVSS 6.3 · Medium EPSS 0.38% · P30

Affected Version Matrix 27

VendorProduct Version RangeStatus
janeczku Calibre-Web 0.6.0 affected
0.6.1 affected
0.6.2 affected
0.6.3 affected
0.6.4 affected
0.6.5 affected
0.6.6 affected
0.6.7 affected
… +19 more rows
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I. Basic Information for CVE-2026-7709

Vulnerability Information
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Vulnerability Title
janeczku Calibre-Web Endpoint kobo_auth.py generate_auth_token improper authorization
Source: CVE Program / CVE List V5
Vulnerability Description
A vulnerability was identified in janeczku Calibre-Web up to 0.6.26. The impacted element is the function generate_auth_token of the file cps/kobo_auth.py of the component Endpoint. Such manipulation of the argument user_id leads to improper authorization. The attack may be launched remotely. The exploit is publicly available and might be used. The vendor was contacted early about this disclosure but did not respond in any way.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
授权机制不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
Calibre-Web 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Calibre-Web是Jan B个人开发者的一款用于浏览、阅读和下载Calibre数据库中电子书的Web应用程序。 Calibre-Web 0.6.26及之前版本存在安全漏洞，该漏洞源于组件Endpoint中文件cps/kobo_auth.py的函数generate_auth_token对参数user_id的操作，可能导致授权不当。
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
janeczku Calibre-Web 0.6.0 cpe:2.3:a:janeczku:calibre-web:*:*:*:*:*:*:*:*

II. Public POCs for CVE-2026-7709

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III. Intelligence Information for CVE-2026-7709

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Other References for CVE-2026-7709 (1)

IV. Related Vulnerabilities

Same vendor: janeczku
Same weakness: CWE-285

V. Comments for CVE-2026-7709

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