CVE-2026-109206

Medium

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.

SeverityMedium

CVSS5.3

Exploit probability—

ProductLogicalDOC Community Edition

PublishedOct 12, 2026

First seenOct 12, 2026

Weakness typeCWE-204CWE-204

How to fix

Patches

github.com/logicaldoc/community/commit/4e93a69526ae7fe50f670b85b3fc57181f3de3f7

Affected products

Product	Affected versions	Fixed in
LogicalDOC LogicalDOC Community Edition	v ≤ 9.3	—

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