CVE-2026-15815

HIGHPre-NVD 8.88.8—
EchelonGraph scoreHIGH confidence

Score 8.8 from GitHub Security Advisory (severity: HIGH) published 2026-09-17. a secondary CVSS source baseline 8.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 4 sources updated this week
8.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 1%CVSS: 8.8Exploit: None knownExposed: 0

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

Grafana OSS and Grafana Enterprise did not safely resolve symbolic links when extracting plugin archives. A crafted plugin archive can chain relative symbolic link entries to escape the plugin installation directory, writing arbitrary files and an executable backend binary outside that directory. The dropped executable runs with the privileges of the Grafana server process, resulting in remote code execution.

Plugin archives are extracted before their signature is verified, so a valid plugin signature does not prevent the write. An operator can therefore be affected by installing a plugin that appears legitimate, as well as by installing a plugin from an arbitrary archive using grafana-cli, the GF_INSTALL_PLUGINS environment variable, or preinstall configuration.

Grafana Enterprise is affected because it includes the same plugin extraction code as Grafana OSS.

CVSS v3
8.8
EG Score
8.8(high)
EG Risk
40(Track)
EG Risk 40/100SSVC: 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
Severity88% × 45%
Exploitation1% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
1%
EPSS %ILE
57%
KEV
Not listed

Published

September 17, 2026

Last Modified

September 19, 2026

References (1)

Vendor Advisories for CVE-2026-15815(1)

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

Weakness Classification(3)

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

Data Freshness Timeline

(refreshed 20× in last 7d / 20× 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. 2026-09-20 15:21 UTCGHSA enrichment
  2. 2026-09-20 03:44 UTCGHSA enrichment
  3. 2026-09-19 16:08 UTCEG score recompute
  4. 2026-09-19 16:08 UTCGHSA enrichment
  5. 2026-09-19 04:32 UTCEG score recompute
  6. 2026-09-19 04:31 UTCGHSA enrichment
  7. 2026-09-19 04:02 UTCEG score recompute
  8. 2026-09-19 04:01 UTCGHSA enrichment
  9. 2026-09-18 19:48 UTCEG score recompute
  10. 2026-09-18 19:48 UTCGHSA enrichment
  11. 2026-09-18 19:27 UTCEPSS rescore
  12. 2026-09-18 15:26 UTCEG score recompute
  13. 2026-09-18 15:26 UTCGHSA enrichment
  14. 2026-09-18 14:35 UTCEG score recompute
  15. 2026-09-18 14:35 UTCGHSA enrichment
  16. 2026-09-18 08:56 UTCEG score recompute
  17. 2026-09-18 08:56 UTCGHSA enrichment
  18. 2026-09-17 21:20 UTCEG score recompute
  19. 2026-09-17 20:49 UTCEG score recompute
  20. 2026-09-17 20:49 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-15815?
CVE-2026-15815 is a high vulnerability published on September 17, 2026. Grafana OSS and Grafana Enterprise did not safely resolve symbolic links when extracting plugin archives. A crafted plugin archive can chain relative symbolic link entries to escape the plugin installation directory, writing arbitrary files and an executable backend binary outside that directory.…
When was CVE-2026-15815 disclosed?
CVE-2026-15815 was first published in the National Vulnerability Database on September 17, 2026, with the most recent update on September 19, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-15815 actively exploited?
CVE-2026-15815 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 1% probability of exploitation in the next 30 days, which ranks it in the top 42.9% of all scored CVEs.
What is the CVSS score of CVE-2026-15815?
CVE-2026-15815 has a CVSS v3 base score of 8.8 (NVD).
How do I remediate CVE-2026-15815?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-15815, 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

Explore the affected products and dependency analysis for CVE-2026-15815

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