CVE-2026-109206CWE-204

CVE-2026-109206

Medium · published October 12, 2026

CVSS v3.1
5.3
EPSS
0%
Percentile
15.2
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
5.3 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
CVSS v4.0
6.9 · CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N
EPSS
0.00248 · 15.2th percentile
Weakness
CWE-204 · Observable Response Discrepancy
Published
2026-10-12T18:17Z
References (5)
https://github.com/logicaldoc/community · [email protected]https://github.com/logicaldoc/community/blob/9.3/logicaldoc-webapp/src/main/java/com/logicaldoc/web/AvatarServlet.java#L63 · [email protected]https://github.com/logicaldoc/community/commit/4e93a69526ae7fe50f670b85b3fc57181f3de3f7 · [email protected]https://github.com/logicaldoc/community/discussions/119 · [email protected]https://www.vulncheck.com/advisories/logicaldoc-community-edition-through-9.3-username-enumeration-via-avatarservlet · [email protected]
EPSS history
Timeline
  • 14 OCT 03:27Z
    EPSS moved — → 0%
    epss
  • 12 OCT 13:39Z
    LogicalDOC Community Edition through 9.3 Username Enumeration via AvatarServlet
    cvelistv5
  • 12 OCT 13:39Z
    LogicalDOC Community Edition through 9.3 Username Enumeration via AvatarServlet
    cvelistv5