Auth bypass in Arthi-Chaud Meelo
CVE-2026-122327
Meelo through 3.13.1 contains a missing authorization vulnerability that allows authenticated non-admin users to modify shared catalog data because RolesGuard does not require Admin on song, track and video write routes. Attackers can send PUT requests to /songs/:idOrSlug, /tracks/:idOrSlug or /videos/:idOrSlug, or POST to /songs/:idOrSlug/merge, to alter genres, reassign tracks and merge songs.
Vulnerability class: Broken Access Control
Published .
CVSS v3 metric
CVSS v3 base score 4.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N.
EPSS exploit prediction
No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.
Affected products
Weakness classification (CWE)
References
- github.com/Arthi-chaud/Meelo (product)
- github.com/Arthi-chaud/Meelo/blob/v3.13.1/server/src/authentication/roles/roles… (technical-description)
- github.com/Arthi-chaud/Meelo/blob/v3.13.1/server/src/song/song.controller.ts (technical-description)
- github.com/Arthi-chaud/Meelo/blob/v3.13.1/server/src/track/track.controller.ts (technical-description)
- github.com/Arthi-chaud/Meelo/blob/v3.13.1/server/src/video/video.controller.ts (technical-description)
- github.com/Arthi-chaud/Meelo/issues/2185 (issue-tracking)
- hackmd.io/@hieund/meelo-catalog-metadata-write-missing-admin-authz (third-party-advisory)
- www.vulncheck.com/advisories/meelo-through-3.13.1-missing-authorization-on-song… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-122327?
- CVE-2026-122327 is a medium-severity vulnerability in Arthi-Chaud Meelo, classified under Missing Authorization. CVSS score: 4.3/10. Published 2026-11-05.
- How severe is CVE-2026-122327?
- Medium severity. CVSS v3 base score is 4.3 out of 10.