Vulnerability · Published Jul 7, 2026 · Assigned by GitHub_M
CVE-2026-55417Chevereto private profile setting leaks username on /json endpoint
Medium 6.9
In plain English
A medium-severity missing authorization in chevereto from chevereto. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 37% of all known vulnerabilities).
Official 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.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| chevereto | chevereto | >= 3.7.5, < 4.5.4 |
| chevereto | chevereto/chevereto | >= 4.0.5, < 4.5.4 |
| chevereto | rodber/chevereto-free | >= 1.0.0 |
Weakness: CWE-862 · Vector: 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