CVE-2026-8609

HIGHNVD 7.55.3▼
EchelonGraph scoreMEDIUM confidence

Score 5.3 from GitHub Security Advisory published 2026-07-10. NVD baseline CVSS 7.5; sources differ by 2.2.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
Trending — 5 sources updated this week
7.5
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 0%CVSS: 7.5Exploit: NoneExposed: 0

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

An unauthenticated attacker can repeatedly call Grafana's OAuth login route with unique values, causing unbounded memory growth that can eventually exhaust memory and crash the Grafana instance (denial of service).

CVSS v3
7.5
EG Score
5.3(medium)
EPSS
28.0%
KEV
Not listed

Published

July 10, 2026

Last Modified

July 13, 2026

Advisory Details (1)

Auto-updated Jul 10, 2026
No patch confirmed yet.
generic

Pre-authentication denial of service in the OAuth login route | Grafana Labs

https://grafana.com/security/security-advisories/cve-2026-8609

Vendor Advisories for CVE-2026-8609(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 14× in last 7d / 14× 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. 2026-07-14 13:04 UTCEG score recompute
  2. 2026-07-14 13:04 UTCGHSA enrichment
  3. 2026-07-13 22:31 UTCEPSS rescore
  4. 2026-07-13 22:08 UTCNVD updateCVSS v3 → 7.5 · severity → HIGH
  5. 2026-07-13 13:43 UTCEG score recompute
  6. 2026-07-13 13:43 UTCGHSA enrichment
  7. 2026-07-13 06:13 UTCEPSS rescore
  8. 2026-07-12 14:22 UTCEG score recompute
  9. 2026-07-12 14:22 UTCGHSA enrichment
  10. 2026-07-12 05:46 UTCEPSS rescore
  11. 2026-07-11 15:00 UTCEG score recompute
  12. 2026-07-11 15:00 UTCGHSA enrichment
  13. 2026-07-10 15:38 UTCEG score recompute
  14. 2026-07-10 15:37 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-8609?
CVE-2026-8609 is a high vulnerability published on July 10, 2026. An unauthenticated attacker can repeatedly call Grafana's OAuth login route with unique values, causing unbounded memory growth that can eventually exhaust memory and crash the Grafana instance (denial of service).
When was CVE-2026-8609 disclosed?
CVE-2026-8609 was first published in the National Vulnerability Database on July 10, 2026, with the most recent update on July 13, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-8609 actively exploited?
CVE-2026-8609 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 28.0% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-8609?
CVE-2026-8609 has a CVSS v3 base score of 7.5 (NVD). EchelonGraph synthesises NVD + CISA KEV + FIRST EPSS + GHSA into a combined EG score of 5.3.
How do I remediate CVE-2026-8609?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-8609, 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-2026-8609

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