{"id":"CVE-2026-109206","title":"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","summary":"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 sup…","severity":"medium","cvss":5.3,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N","cwe":["CWE-204"],"published":"2026-10-12","updated":"2026-10-12","sourceUpdated":"2026-10-12T14:17:11.427","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-109206","references":[{"url":"https://github.com/logicaldoc/community","label":"disclosure@vulncheck.com"},{"url":"https://github.com/logicaldoc/community/blob/9.3/logicaldoc-webapp/src/main/java/com/logicaldoc/web/AvatarServlet.java#L63","label":"disclosure@vulncheck.com"},{"url":"https://github.com/logicaldoc/community/commit/4e93a69526ae7fe50f670b85b3fc57181f3de3f7","label":"disclosure@vulncheck.com"},{"url":"https://github.com/logicaldoc/community/discussions/119","label":"disclosure@vulncheck.com"},{"url":"https://www.vulncheck.com/advisories/logicaldoc-community-edition-through-9.3-username-enumeration-via-avatarservlet","label":"disclosure@vulncheck.com"}],"tags":["nvd"],"ingestedAt":"2026-10-12T14:50:34.121Z","slug":"CVE-2026-109206","body":"## Overview\n\nLogicalDOC 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.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":29,"depthScoreParts":{"impact":29.2,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}