CVE-2026-86118 json
gonic before 0.22.0 Missing Administrator Check on the Subsonic startScan Endpoint
published 3mo ago modified last mo. also EUVD-2026-71950 , GHSA-453r-pgfw-h3pq
Unreviewed: the maintainers' own advisory
Published by the maintainers on their GitHub repository sentriz/gonic. GitHub has not reviewed it into the GitHub Advisory Database, so the affected packages and versions are the maintainers' word. Read the full advisory on GitHub.
- cvss
- 4.3
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.5%
- EPSS 0.5% chance of exploitation in 30 days, percentile 41%
- public exploits
- 0
- none known
Summary
gonic versions before 0.22.0 fail to validate administrator privileges in the startScan endpoint, allowing any authenticated user to trigger media library rescans. Attackers can repeatedly call the startScan endpoint to force CPU and I/O-intensive filesystem operations, causing denial of service on multi-user instances.
Patch / fix
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Check with FencerCISA SSVC
- Exploitation
- Proof of concept is public
- Automatable
- no
- Technical impact
- partial
- Assessed
- 2mo ago
Exploit prediction
0.47% chance of exploitation in the next 30 days, higher than 41% of all scored CVEs (FIRST EPSS, 2026-11-11).
Exploits and checks
- github.com https://github.com/sentriz/gonic/security/advisories/GHSA-453r-pgfw-h3pq referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 4.0 | 5.3 | CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N |
| CNA | 3.1 | 4.3 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L |
| CNA | 4.0 | 5.3 | CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/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 |
Affected products
- sentriz gonic
Classification
- Weakness
-
- CWE-862 Missing Authorization
References
-
github.com
/sentriz/gonic/security/advisories/GHSA-453r-pgfw-h3pq
vendor-advisory, exploit, advisory
-
github.com
/sentriz/gonic/blob/v0.21.0/server/ctrlsubsonic/handlers_common.go
technical-description
-
github.com
/sentriz/gonic/blob/v0.21.0/server/ctrlsubsonic/ctrl.go
technical-description
-
github.com
/sentriz/gonic/releases/tag/v0.22.0
release-notes
-
github.com
/sentriz/gonic
product
-
vulncheck.com
/advisories/gonic-before-0.22.0-missing-administrator-check-on-the-subsonic-startscan-endpoint
third-party-advisory
Sources
- CVE List CVE-2026-86118
- NVD CVE-2026-86118
- Maintainer advisory GHSA-453r-pgfw-h3pq
Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.
The maintainers of sentriz/gonic published their own advisory on GitHub. Reviewed sources take precedence over it.