Auth bypass in Janeczku Calibre-Web
CVE-2026-7709
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 · last modified .
CVSS v3 metric
CVSS v3 base score 6.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L.
EPSS exploit prediction
EPSS: 0.004 (29.2th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 29th percentile — 29.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.002 · newest: 0.004 · change: +0.002
Affected products
- Janeczku Calibre-Web — versions 0.6.0, 0.6.1, 0.6.2
Weakness classification (CWE)
References
- vuldb.com/vuln/360885 (technical-description, vdb-entry)
- vuldb.com/vuln/360885/cti (signature, permissions-required)
- vuldb.com/submit/805823 (third-party-advisory)
- drive.google.com/drive/folders/1rosrcfxcHrQM7_GOiBwzY_GnCfXoFuVR (exploit)
Frequently asked questions
- What is CVE-2026-7709?
- CVE-2026-7709 is a medium-severity vulnerability in Janeczku Calibre-Web, classified under Incorrect Privilege Assignment. CVSS score: 6.3/10. Published 2026-05-03.
- How severe is CVE-2026-7709?
- Medium severity. CVSS v3 base score is 6.3 out of 10.