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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.

PUBLISHED Reserved 2026-05-03 | Published 2026-05-03 | Updated 2026-05-04 | Assigner VulDB




MEDIUM: 5.3CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P
MEDIUM: 6.3CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L/E:P/RL:X/RC:R
MEDIUM: 6.3CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L/E:P/RL:X/RC:R
6.5AV:N/AC:L/Au:S/C:P/I:P/A:P/E:POC/RL:ND/RC:UR

Problem types

Improper Authorization

Incorrect Privilege Assignment

Product status

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

0.6.8
affected

0.6.9
affected

0.6.10
affected

0.6.11
affected

0.6.12
affected

0.6.13
affected

0.6.14
affected

0.6.15
affected

0.6.16
affected

0.6.17
affected

0.6.18
affected

0.6.19
affected

0.6.20
affected

0.6.21
affected

0.6.22
affected

0.6.23
affected

0.6.24
affected

0.6.25
affected

0.6.26
affected

Timeline

2026-05-03:Advisory disclosed
2026-05-03:VulDB entry created
2026-05-03:VulDB entry last update

Credits

JasperX (VulDB User) reporter

VulDB CNA Team coordinator

References

vuldb.com/vuln/360885 (VDB-360885 | janeczku Calibre-Web Endpoint kobo_auth.py generate_auth_token improper authorization) vdb-entry technical-description

vuldb.com/vuln/360885/cti (VDB-360885 | CTI Indicators (IOB, IOC, TTP, IOA)) signature permissions-required

vuldb.com/submit/805823 (Submit #805823 | Janeczku Calibre-web V0.6.7-V0.6.26 IDOR in auth-token generation leading to account takeover / user) third-party-advisory

drive.google.com/...cHrQM7_GOiBwzY_GnCfXoFuVR?usp=drive_link exploit

cve.org (CVE-2026-7709)

nvd.nist.gov (CVE-2026-7709)

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