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

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MEDIUM

janeczku Calibre-Web Endpoint kobo_auth.py generate_auth_token improper authorization

Published May 3, 2026

5.3

MEDIUM

CVSS 4.0

EPSS 0.38%

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.

Affected products

Vendor Janeczku Product Calibre-Web Default
n/a
- Version
  0.6.0
  Status
  affected
  Constraints
  -
- Version
  0.6.1
  Status
  affected
  Constraints
  -
- Version
  0.6.10
  Status
  affected
  Constraints
  -
- Version
  0.6.11
  Status
  affected
  Constraints
  -
- Version
  0.6.12
  Status
  affected
  Constraints
  -
- Version
  0.6.13
  Status
  affected
  Constraints
  -
- Version
  0.6.14
  Status
  affected
  Constraints
  -
- Version
  0.6.15
  Status
  affected
  Constraints
  -
- Version
  0.6.16
  Status
  affected
  Constraints
  -
- Version
  0.6.17
  Status
  affected
  Constraints
  -
- Version
  0.6.18
  Status
  affected
  Constraints
  -
- Version
  0.6.19
  Status
  affected
  Constraints
  -
- Version
  0.6.2
  Status
  affected
  Constraints
  -
- Version
  0.6.20
  Status
  affected
  Constraints
  -
- Version
  0.6.21
  Status
  affected
  Constraints
  -
- Version
  0.6.22
  Status
  affected
  Constraints
  -
- Version
  0.6.23
  Status
  affected
  Constraints
  -
- Version
  0.6.24
  Status
  affected
  Constraints
  -
- Version
  0.6.25
  Status
  affected
  Constraints
  -
- Version
  0.6.26
  Status
  affected
  Constraints
  -
- Version
  0.6.3
  Status
  affected
  Constraints
  -
- Version
  0.6.4
  Status
  affected
  Constraints
  -
- Version
  0.6.5
  Status
  affected
  Constraints
  -
- Version
  0.6.6
  Status
  affected
  Constraints
  -
- Version
  0.6.7
  Status
  affected
  Constraints
  -
- Version
  0.6.8
  Status
  affected
  Constraints
  -
- Version
  0.6.9
  Status
  affected
  Constraints
  -

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor

Product

Default status

Versions

Janeczku

Calibre-Web

n/a

Version	Status	Constraints
0.6.0	affected	-
0.6.1	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	-
0.6.2	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	-
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	-

Remediation

No remediation recorded yet.

Weaknesses (2)

CWE-266

Incorrect Privilege Assignment

CWE-285

References (5)

https://drive.google.com/drive/folders/1rosrcfxcHrQM7_GOiBwzY_GnCfXoFuVR?usp=drive_link
exploit
https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-26849
Advisory
https://vuldb.com/submit/805823
third-party-advisory
https://vuldb.com/vuln/360885
vdb-entrytechnical-description
https://vuldb.com/vuln/360885/cti
signaturepermissions-required

Link	Providers	Tags
https://drive.google.com/drive/folders/1rosrcfxcHrQM7_GOiBwzY_GnCfXoFuVR?usp=drive_link		exploit
https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-26849		Advisory
https://vuldb.com/submit/805823		third-party-advisory
https://vuldb.com/vuln/360885		vdb-entrytechnical-description
https://vuldb.com/vuln/360885/cti		signaturepermissions-required