CVE-2026-8609

MEDIUMPre-NVD 5.35.3
EchelonGraph scoreMEDIUM confidence

“—” beside the score: it is equal to the CVSS score beside it.

Score 5.3 from GitHub Security Advisory published 2026-07-10. The CNA's CVSS baseline 5.3; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: the CNA's CVSS, EPSS, GitHub Security Advisory
5.3EG
EchelonGraph verdictMonitorRemediate within your standard update timelines at low or medium mission impact and sooner than that at high (the SSVC decision on this page).
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0.5%CVSS: 5.3Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

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
5.3
EG Score
5.3MEDIUMmedium confidence
EG Risk
39
EG Risk 39/100

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 (value × EchelonGraph’s weight)
Severity53% × 45%
The EG Score, 5.3 of 10.
Exploitation0.5% × 40%
FIRST EPSS: the 30-day exploitation probability when EchelonGraph scored this CVE.
Automatability100% × 15%
CISA's SSVC Automatable value: yes (Vulnrichment).
SSVC (CISA's decision table, applied by EchelonGraph): Track at low or medium mission impact; Attend at high (mission-essential systems).
Exploitation none (CISA Vulnrichment) · Automatable yes (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE.
Action: A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.
EPSS PROB
0.5%
EPSS %ILE
39th
KEV
Not listed

SSVC (CISA's decision table, applied by EchelonGraph)Track at low or medium mission impact; Attend at high (mission-essential systems).

A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.

Exploitation none (CISA Vulnrichment) · Automatable yes (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE. Mission impact is CISA's Mission & Well-being decision point, and only you can judge it. CISA's table makes it high when Mission Prevalence is Essential — the vulnerable component "directly provides capabilities that constitute at least one MEF for at least one entity" (MEF: mission essential function) — or when Public Well-Being Impact is Irreversible: "multiple fatalities are likely", the cyber-physical system "is likely lost or destroyed", "extreme or serious externalities" are imposed on other parties, or social systems such as elections or the financial grid "are destabilized and potentially collapse". CISA's decision table

BOD 26-04 (CISA's remediation timeline, Table 1)14 days if the affected system is publicly exposed; 60 days if it is not.

In CISA KEV no (CISA's KEV catalog) · Automatable yes (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). Whether your system is publicly exposed is yours to answer. BOD 26-04 binds US Federal Civilian Executive Branch agencies; for anyone else it is CISA's published timeline, a reference rather than an obligation. The directive · how EchelonGraph applies it

Published

July 10, 2026

Last Modified

August 27, 2026

Advisory Details (1)

Auto-updated Jul 10, 2026
Patch available.
Web page

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(6)

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

Patch Availability(5)

Vendor / EcosystemFix (by version range) / PatchReleasedSource
redhatgrafana-0:10.2.6-26.el10_02026-09-15redhat
redhatgrafana12-4-main-12.4.10-0.1.hum12026-09-08redhat
redhatgrafana13-1-main-13.1.3-0.5.hum12026-09-03redhat
redhatgrafana13-2-main-13.2.1-0.1.hum12026-09-03redhat
redhatgrafana-0:10.2.6-28.el10_2.42026-08-12redhat

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 11× in last 7d / 44× in last 30d)

Each row is a time one of our pipelines fetched, updated or re-scored this CVE. 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. An arrow marks a change the record states ("CVSS v3 → 9.1"); EPSS and GHSA rows show the values recorded at that time, not what changed (EPSS values are rounded; hover one for the exact figures). Most recent first.

Showing the most recent 99 of 225 refreshes on record for this CVE.

A repeat, a row identical to one the same pipeline wrote less than 10 seconds earlier, is not a separate refresh and is not counted. 1 repeat row among the latest 100 is merged into the row it repeats. The 126 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-10-13 16:35 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  2. 2026-10-12 16:35 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  3. 2026-10-12 14:52 UTCEG score recompute
  4. 2026-10-11 19:17 UTCEG score recompute
  5. 2026-10-11 16:34 UTCEG score recompute
  6. 2026-10-11 13:51 UTCEG score recompute
  7. 2026-10-11 13:50 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  8. 2026-10-10 20:00 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  9. 2026-10-09 20:07 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  10. 2026-10-08 17:13 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  11. 2026-10-07 23:48 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  12. 2026-10-06 15:18 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  13. 2026-10-05 17:44 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  14. 2026-10-04 23:22 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  15. 2026-10-01 19:51 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  16. 2026-10-01 15:12 UTCEG score recompute
  17. 2026-10-01 15:12 UTCVendor advisory
  18. 2026-10-01 15:12 UTCGHSA enrichmentGHSA-j7jj-549c-j492 · GitHub CVSS 5.3
  19. 2026-09-30 15:04 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  20. 2026-09-28 13:52 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  21. 2026-09-28 09:49 UTCEG score recompute
  22. 2026-09-28 09:49 UTCVendor advisory
  23. 2026-09-28 09:49 UTCGHSA enrichmentGHSA-j7jj-549c-j492 · GitHub CVSS 5.3
  24. 2026-09-27 13:49 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  25. 2026-09-26 15:59 UTCEPSS rescoreEPSS 0.5% · 38th percentile
Show 74 more
  1. 2026-09-24 14:04 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  2. 2026-09-24 11:13 UTCEG score recompute
  3. 2026-09-24 11:13 UTCVendor advisory
  4. 2026-09-24 11:13 UTCGHSA enrichmentGHSA-j7jj-549c-j492 · GitHub CVSS 5.3
  5. 2026-09-23 17:54 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
  6. 2026-09-23 05:46 UTCEG score recompute
  7. 2026-09-23 05:46 UTCVendor advisory
  8. 2026-09-23 05:46 UTCGHSA enrichmentGHSA-j7jj-549c-j492 · GitHub CVSS 5.3
  9. 2026-09-22 16:01 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
  10. 2026-09-21 21:09 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
  11. 2026-09-20 20:16 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
  12. 2026-09-18 19:28 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
  13. 2026-09-18 05:19 UTCEG score recompute
  14. 2026-09-18 05:19 UTCVendor advisory
  15. 2026-09-18 05:19 UTCGHSA enrichmentGHSA-j7jj-549c-j492 · GitHub CVSS 5.3
  16. 2026-09-17 19:32 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
  17. 2026-09-16 14:09 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
  18. 2026-09-16 05:15 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
  19. 2026-09-15 03:12 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
  20. 2026-09-14 07:34 UTCEG score recompute
  21. 2026-09-14 07:34 UTCVendor advisory
  22. 2026-09-14 07:34 UTCGHSA enrichmentGHSA-j7jj-549c-j492 · GitHub CVSS 5.3
  23. 2026-09-13 16:48 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
  24. 2026-09-13 08:13 UTCEG score recompute
  25. 2026-09-13 08:13 UTCVendor advisory
  26. 2026-09-13 08:13 UTCGHSA enrichmentGHSA-j7jj-549c-j492 · GitHub CVSS 5.3
  27. 2026-09-12 15:02 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
  28. 2026-09-12 02:59 UTCEG score recompute
  29. 2026-09-12 02:59 UTCVendor advisory
  30. 2026-09-12 02:59 UTCGHSA enrichmentGHSA-j7jj-549c-j492 · GitHub CVSS 5.3
  31. 2026-09-11 14:53 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
  32. 2026-09-11 09:38 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
  33. 2026-09-08 22:01 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
  34. 2026-09-08 02:54 UTCEG score recompute
  35. 2026-09-08 02:54 UTCVendor advisory
  36. 2026-09-08 02:54 UTCGHSA enrichmentGHSA-j7jj-549c-j492 · GitHub CVSS 5.3
  37. 2026-09-06 13:48 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
  38. 2026-09-05 21:45 UTCEG score recompute
  39. 2026-09-05 21:45 UTCVendor advisory
  40. 2026-09-05 21:45 UTCGHSA enrichmentGHSA-j7jj-549c-j492 · GitHub CVSS 5.3
  41. 2026-09-05 15:31 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  42. 2026-09-04 05:07 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  43. 2026-09-02 14:12 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  44. 2026-09-01 13:54 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  45. 2026-09-01 04:40 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  46. 2026-08-30 19:18 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  47. 2026-08-30 06:26 UTCEG score recompute
  48. 2026-08-30 06:26 UTCVendor advisory
  49. 2026-08-30 06:26 UTCGHSA enrichmentGHSA-j7jj-549c-j492 · GitHub CVSS 5.3
  50. 2026-08-30 01:22 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  51. 2026-08-28 21:42 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  52. 2026-08-27 18:01 UTCEG score recompute
  53. 2026-08-27 18:01 UTCVendor advisory
  54. 2026-08-27 18:01 UTCGHSA enrichmentGHSA-j7jj-549c-j492 · GitHub CVSS 5.3
  55. 2026-08-27 14:25 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  56. 2026-08-26 14:47 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  57. 2026-08-26 09:14 UTCEG score recompute
  58. 2026-08-26 09:14 UTCVendor advisory
  59. 2026-08-26 09:14 UTCGHSA enrichmentGHSA-j7jj-549c-j492 · GitHub CVSS 5.3
  60. 2026-08-25 13:49 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  61. 2026-08-25 13:29 UTCEG score recompute
  62. 2026-08-25 13:29 UTCVendor advisory
  63. 2026-08-25 13:29 UTCGHSA enrichmentGHSA-j7jj-549c-j492 · GitHub CVSS 5.3
  64. 2026-08-24 14:18 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  65. 2026-08-24 14:02 UTCEG score recompute
  66. 2026-08-24 14:02 UTCVendor advisory
  67. 2026-08-24 14:02 UTCGHSA enrichmentGHSA-j7jj-549c-j492 · GitHub CVSS 5.3
  68. 2026-08-23 16:50 UTCEG score recompute
  69. 2026-08-23 16:50 UTCVendor advisory
  70. 2026-08-23 16:50 UTCGHSA enrichmentGHSA-j7jj-549c-j492 · GitHub CVSS 5.3
  71. 2026-08-23 00:19 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
  72. 2026-08-22 17:29 UTCEG score recompute
  73. 2026-08-22 17:29 UTCVendor advisory
  74. 2026-08-22 17:29 UTCGHSA enrichmentGHSA-j7jj-549c-j492 · GitHub CVSS 5.3

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Frequently asked(5)

What is CVE-2026-8609?
CVE-2026-8609 is a medium-severity vulnerability; its CVE record was 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 made public?
CVE-2026-8609 was made public on June 9, 2026: that is the date its CVE record's CNA, Grafana Labs, gives for when the vulnerability was made public. The CVE record itself was published on July 10, 2026. EchelonGraph's copy of the record carries a last-modified date of August 27, 2026; the record at its source may have been updated since.
Is CVE-2026-8609 actively exploited?
CVE-2026-8609 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.5% probability of exploitation in the next 30 days (39th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-8609?
CVE-2026-8609 has a CVSS base score of 5.3 (the CNA's own assessment, by grafana; NVD's own analysis pending).
How do I remediate CVE-2026-8609?
A fix for CVE-2026-8609 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-8609 are linked in the Vendor Advisories panel on this page.

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