CVE-2026-109206 LogicalDOC Community Edition through 9.3 Username Enumeration via AvatarServlet
Unauthenticated attackers can enumerate valid usernames and retrieve profile pictures in LogicalDOC Community Edition via the AvatarServlet.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-109206?
CVE-2026-109206 is a medium-severity vulnerability in LogicalDOC Community Edition, published on 12 Oct 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
LogicalDOC Community Edition through 9.3 contains a username enumeration vulnerability that allows unauthenticated attackers to identify valid accounts because the AvatarServlet (/avatar) performs no session validation. Attackers can supply usernames or numeric IDs in the userId parameter and compare 1x1 transparent images against real avatars to enumerate users and retrieve profile pictures.
Weakness: CWE-204
Which versions are affected by CVE-2026-109206?
How do I fix CVE-2026-109206?
No fix has been published for CVE-2026-109206 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-109206 being exploited?
There is no known exploitation of CVE-2026-109206 in the wild and no public exploit code.
Sources
Also known as GHSA-g7j6-49p3-h792.