CVE-2026-109206

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.

CVSS v3 5.3 MEDIUM

5.3^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 3.9 / Impact : 1.4

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact LOW

Integrity Impact NONE

Availability Impact NONE

Scope UNCHANGED

References

Link	Resource
https://github.com/logicaldoc/community
https://github.com/logicaldoc/community/blob/9.3/logicaldoc-webapp/src/main/java/com/logicaldoc/web/AvatarServlet.java#L63
https://github.com/logicaldoc/community/commit/4e93a69526ae7fe50f670b85b3fc57181f3de3f7
https://github.com/logicaldoc/community/discussions/119
https://www.vulncheck.com/advisories/logicaldoc-community-edition-through-9.3-username-enumeration-via-avatarservlet

Configurations

No configuration.

History

12 Oct 2026, 14:17

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-10-12 14:17

Updated : 2026-10-13 20:41

NVD link : CVE-2026-109206

Mitre link : CVE-2026-109206

CVE.ORG link : CVE-2026-109206

JSON object : View

Products Affected

No product.

CWE

CWE-204

Observable Response Discrepancy

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