CVE-2026-86118

MEDIUMPre-NVD 4.34.3—
EchelonGraph scoreHIGH confidence

Score 4.3 from GitHub Security Advisory published 2026-09-05. the CNA's CVSS baseline 4.3; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cna:vulncheck, epss, ghsa
Trending — 3 sources updated this weekElevated
4.3EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 4.3Exploit: Elevated riskExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

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.

CVSS v3
4.3
EG Score
4.3(high)
EG Risk
35(Track)
EG Risk 35/100SSVC: Track

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity43% × 45%
Exploitation40% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
38%
KEV
Not listed

Published

September 5, 2026

Last Modified

September 24, 2026

Advisory Details (6)

Auto-updated Sep 5, 2026
🔬 Proof of concept available. Patch available. Sources: github, github_release.
generic

gonic before 0.22.0 Missing Administrator Check on the Subsonic startScan Endpoint | Advisories | VulnCheck

https://www.vulncheck.com/advisories/gonic-before-0.22.0-missing-administrator-check-on-the-subsonic-startscan-endpoint
github Patch Available🟡 PoC Available

startScan endpoint accessible to any authenticated user · Advisory · sentriz/gonic · GitHub

https://github.com/sentriz/gonic/security/advisories/GHSA-453r-pgfw-h3pq
github_release Patch Available

gonic v0.22.0

Patch available: sentriz/gonic v0.22.0

https://github.com/sentriz/gonic/releases/tag/v0.22.0
generic

gonic/server/ctrlsubsonic/handlers_common.go at v0.21.0 · sentriz/gonic · GitHub

https://github.com/sentriz/gonic/blob/v0.21.0/server/ctrlsubsonic/handlers_common.go
generic

gonic/server/ctrlsubsonic/ctrl.go at v0.21.0 · sentriz/gonic · GitHub

https://github.com/sentriz/gonic/blob/v0.21.0/server/ctrlsubsonic/ctrl.go
generic

GitHub - sentriz/gonic: music streaming server / free-software subsonic server API implementation · GitHub

https://github.com/sentriz/gonic

Vendor Advisories for CVE-2026-86118(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 20× in last 7d / 56× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

  1. 2026-09-24 14:55 UTCEG score recompute
  2. 2026-09-24 14:55 UTCGHSA enrichment
  3. 2026-09-24 14:04 UTCEPSS rescore
  4. 2026-09-24 02:44 UTCEG score recompute
  5. 2026-09-24 02:44 UTCGHSA enrichment
  6. 2026-09-23 17:54 UTCEPSS rescore
  7. 2026-09-23 00:53 UTCEG score recompute
  8. 2026-09-23 00:53 UTCGHSA enrichment
  9. 2026-09-22 16:01 UTCEPSS rescore
  10. 2026-09-21 23:02 UTCEG score recompute
  11. 2026-09-21 23:01 UTCGHSA enrichment
  12. 2026-09-21 21:09 UTCEPSS rescore
  13. 2026-09-20 21:10 UTCEG score recompute
  14. 2026-09-20 21:10 UTCGHSA enrichment
  15. 2026-09-20 20:16 UTCEPSS rescore
  16. 2026-09-19 19:19 UTCEG score recompute
  17. 2026-09-19 19:19 UTCGHSA enrichment
  18. 2026-09-18 19:28 UTCEPSS rescore
  19. 2026-09-18 17:27 UTCEG score recompute
  20. 2026-09-18 17:27 UTCGHSA enrichment
  21. 2026-09-17 19:32 UTCEPSS rescore
  22. 2026-09-17 15:36 UTCEG score recompute
  23. 2026-09-17 15:36 UTCGHSA enrichment
  24. 2026-09-16 14:09 UTCEPSS rescore
  25. 2026-09-16 13:45 UTCEG score recompute
Show 31 more
  1. 2026-09-16 13:45 UTCGHSA enrichment
  2. 2026-09-16 05:15 UTCEPSS rescore
  3. 2026-09-16 04:28 UTCEG score recompute
  4. 2026-09-16 04:28 UTCGHSA enrichment
  5. 2026-09-15 03:12 UTCEPSS rescore
  6. 2026-09-15 03:12 UTCEPSS rescore
  7. 2026-09-15 02:20 UTCGHSA enrichment
  8. 2026-09-14 00:29 UTCEG score recompute
  9. 2026-09-14 00:29 UTCGHSA enrichment
  10. 2026-09-12 22:39 UTCEG score recompute
  11. 2026-09-12 22:39 UTCGHSA enrichment
  12. 2026-09-11 20:48 UTCEG score recompute
  13. 2026-09-11 20:48 UTCGHSA enrichment
  14. 2026-09-11 14:53 UTCEPSS rescore
  15. 2026-09-11 14:53 UTCEPSS rescore
  16. 2026-09-10 18:55 UTCEG score recompute
  17. 2026-09-10 18:55 UTCGHSA enrichment
  18. 2026-09-09 17:04 UTCEG score recompute
  19. 2026-09-09 17:03 UTCGHSA enrichment
  20. 2026-09-08 22:01 UTCEPSS rescore
  21. 2026-09-08 15:13 UTCEG score recompute
  22. 2026-09-08 15:13 UTCGHSA enrichment
  23. 2026-09-08 14:15 UTCEG score recompute
  24. 2026-09-08 14:15 UTCGHSA enrichment
  25. 2026-09-07 14:19 UTCEG score recompute
  26. 2026-09-07 14:18 UTCGHSA enrichment
  27. 2026-09-06 13:48 UTCEPSS rescore
  28. 2026-09-06 12:10 UTCEG score recompute
  29. 2026-09-06 12:10 UTCGHSA enrichment
  30. 2026-09-05 10:16 UTCEG score recompute
  31. 2026-09-05 10:13 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-86118?
CVE-2026-86118 is a medium vulnerability published on September 5, 2026. 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…
When was CVE-2026-86118 disclosed?
CVE-2026-86118 was first published in the National Vulnerability Database on September 5, 2026, with the most recent update on September 24, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-86118 actively exploited?
CVE-2026-86118 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 61.8% of all scored CVEs.
What is the CVSS score of CVE-2026-86118?
CVE-2026-86118 has a CVSS v4.0 base score of 4.3 (CNA self-assessment; NVD's own analysis pending).
How do I remediate CVE-2026-86118?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-86118, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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