What’s Vulnerable › Vulnerabilities

CVE-2026-86118: gonic before 0.22.0 Missing Administrator Check on the Subsonic startScan Endpoint

• Severity: medium (CVSS 4.3 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.5% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-09-05 · updated 2026-09-16
• Weakness: CWE-862

Description

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.

Affected products

• sentriz gonic: before 0.22.0 — fixed in 0.22.0

How to fix

Upgrade to a fixed version: sentriz gonic 0.22.0. Check the vendor advisory for mitigations.

References

• https://github.com/sentriz/gonic
• https://github.com/sentriz/gonic/blob/v0.21.0/server/ctrlsubsonic/ctrl.go
• https://github.com/sentriz/gonic/blob/v0.21.0/server/ctrlsubsonic/handlers_common.go
• https://github.com/sentriz/gonic/releases/tag/v0.22.0
• https://github.com/sentriz/gonic/security/advisories/GHSA-453r-pgfw-h3pq
• https://www.vulncheck.com/advisories/gonic-before-0.22.0-missing-administrator-check-on-the-subsonic-startscan-endpoint
• https://github.com/sentriz/gonic/security/advisories/GHSA-453r-pgfw-h3pq

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