CVE-2026-122326

Description

Chevereto before 4.5.8 contains an authorization bypass vulnerability in the get-album-contents action of the /json route that allows unauthenticated attackers to list private albums by supplying another user's album id. Attackers with a session token from any public page and an album's encoded id can obtain image filenames, viewer and direct file URLs, and download private images.

References

• https://github.com/chevereto/chevereto
• https://github.com/chevereto/chevereto/blob/4.5.7/app/legacy/routes/json.php#L336-L410
• https://github.com/chevereto/chevereto/blob/4.5.7/app/src/Legacy/Classes/Listing.php#L834-L885
• https://github.com/chevereto/chevereto/commit/fe56eb789ecf5e26c84068ba7d88b7a20ea65f5c
• https://github.com/chevereto/chevereto/issues/136