CVE-2026-55417

MEDIUM

Chevereto private profile setting leaks username on /json endpoint

Title source: cna
STIX 2.1

Description

Chevereto is a self-hosted media-sharing platform. Starting in version 3.7.5 and prior to version 4.5.4, when a user enables the private profile option, visiting their profile HTML route (`/username`) correctly returns 404. However, the `/json` AJAX listing endpoint does not apply the same check. An unauthenticated caller who knows the target's user ID can retrieve all of that user's publicly-scoped images, revealing the username (which should be private). This is patched in Chevereto v4.5.4. No known workarounds are available.

References (2)

Core 2

Scores

CVSS v4 6.9
EPSS 0.0025
EPSS Percentile 16.4%
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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

CISA SSVC

Vulnrichment
Exploitation poc
Automatable yes
Technical Impact partial

Details

CWE
CWE-862
Status published
Products (3)
chevereto/chevereto >= 3.7.5, < 4.5.4
chevereto/chevereto/chevereto >= 4.0.5, < 4.5.4
chevereto/rodber/chevereto-free >= 1.0.0
Published Jul 07, 2026
Tracked Since Jul 08, 2026