CVE-2026-7709 janeczku Calibre-Web Endpoint kobo_auth.py generate_auth_token improper authorization
Remote attackers can exploit improper authorization in Calibre-Web's Kobo auth token generation to escalate privileges or take over accounts.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-7709?
CVE-2026-7709 is a medium-severity missing authorization vulnerability in janeczku Calibre-Web, published on 3 May 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official 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.
Which versions are affected by CVE-2026-7709?
How do I fix CVE-2026-7709?
No fix has been published for CVE-2026-7709 yet. Limit exposure of the affected software until one is available.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2026-7709 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-7709 exists.
Sources
Also known as GHSA-6xgw-x2hr-63c2.