CVE-2026-91843

CRITICALPre-NVD 9.89.8—
EchelonGraph scoreHIGH confidence

Score 9.8 from GitHub Security Advisory (severity: CRITICAL) published 2026-09-16. a secondary CVSS source baseline 9.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this week
9.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 1%CVSS: 9.8Exploit: None knownExposed: 0

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

A stack overflow during the unauthenticated login process may allow an attacker to run arbitrary code remotely with root privileges.

CVSS v3
9.8
EG Score
9.8(high)
EG Risk
59(Track)
EG Risk 59/100SSVC: 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
Severity98% × 45%
Exploitation1% × 40%
Automatability100% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
1%
EPSS %ILE
42%
KEV
Not listed

Published

September 16, 2026

Last Modified

September 18, 2026

References (1)

Vendor Advisories for CVE-2026-91843(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 59× in last 7d / 83× 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. 2026-09-25 12:47 UTCGHSA enrichment
  2. 2026-09-25 09:03 UTCGHSA enrichment
  3. 2026-09-25 05:19 UTCGHSA enrichment
  4. 2026-09-25 01:34 UTCGHSA enrichment
  5. 2026-09-24 21:49 UTCGHSA enrichment
  6. 2026-09-24 18:05 UTCGHSA enrichment
  7. 2026-09-24 14:20 UTCEG score recompute
  8. 2026-09-24 14:20 UTCGHSA enrichment
  9. 2026-09-24 14:04 UTCEPSS rescore
  10. 2026-09-24 10:35 UTCGHSA enrichment
  11. 2026-09-24 06:48 UTCGHSA enrichment
  12. 2026-09-24 03:03 UTCGHSA enrichment
  13. 2026-09-23 23:19 UTCGHSA enrichment
  14. 2026-09-23 19:31 UTCEG score recompute
  15. 2026-09-23 19:31 UTCGHSA enrichment
  16. 2026-09-23 17:54 UTCEPSS rescore
  17. 2026-09-23 15:43 UTCGHSA enrichment
  18. 2026-09-23 11:59 UTCGHSA enrichment
  19. 2026-09-23 08:15 UTCGHSA enrichment
  20. 2026-09-23 04:31 UTCGHSA enrichment
  21. 2026-09-23 00:46 UTCGHSA enrichment
  22. 2026-09-22 21:02 UTCGHSA enrichment
  23. 2026-09-22 17:18 UTCEG score recompute
  24. 2026-09-22 17:18 UTCGHSA enrichment
  25. 2026-09-22 16:01 UTCEPSS rescore
Show 58 more
  1. 2026-09-22 13:34 UTCGHSA enrichment
  2. 2026-09-22 09:50 UTCGHSA enrichment
  3. 2026-09-22 06:06 UTCGHSA enrichment
  4. 2026-09-22 02:23 UTCGHSA enrichment
  5. 2026-09-21 22:38 UTCEG score recompute
  6. 2026-09-21 22:38 UTCGHSA enrichment
  7. 2026-09-21 21:09 UTCEPSS rescore
  8. 2026-09-21 18:54 UTCGHSA enrichment
  9. 2026-09-21 15:10 UTCGHSA enrichment
  10. 2026-09-21 11:26 UTCGHSA enrichment
  11. 2026-09-21 07:42 UTCGHSA enrichment
  12. 2026-09-21 03:58 UTCGHSA enrichment
  13. 2026-09-21 00:14 UTCGHSA enrichment
  14. 2026-09-20 20:30 UTCEG score recompute
  15. 2026-09-20 20:30 UTCGHSA enrichment
  16. 2026-09-20 20:16 UTCEPSS rescore
  17. 2026-09-20 16:46 UTCGHSA enrichment
  18. 2026-09-20 13:00 UTCGHSA enrichment
  19. 2026-09-20 09:13 UTCGHSA enrichment
  20. 2026-09-20 05:28 UTCGHSA enrichment
  21. 2026-09-20 01:44 UTCGHSA enrichment
  22. 2026-09-19 22:00 UTCGHSA enrichment
  23. 2026-09-19 18:16 UTCEG score recompute
  24. 2026-09-19 18:16 UTCGHSA enrichment
  25. 2026-09-19 14:31 UTCGHSA enrichment
  26. 2026-09-19 10:46 UTCGHSA enrichment
  27. 2026-09-19 07:02 UTCGHSA enrichment
  28. 2026-09-19 03:18 UTCGHSA enrichment
  29. 2026-09-18 23:33 UTCGHSA enrichment
  30. 2026-09-18 19:48 UTCEG score recompute
  31. 2026-09-18 19:48 UTCGHSA enrichment
  32. 2026-09-18 19:28 UTCEPSS rescore
  33. 2026-09-18 18:25 UTCGHSA enrichment
  34. 2026-09-18 14:41 UTCGHSA enrichment
  35. 2026-09-18 10:57 UTCGHSA enrichment
  36. 2026-09-18 07:13 UTCGHSA enrichment
  37. 2026-09-18 03:29 UTCGHSA enrichment
  38. 2026-09-17 23:44 UTCGHSA enrichment
  39. 2026-09-17 19:49 UTCEG score recompute
  40. 2026-09-17 19:48 UTCGHSA enrichment
  41. 2026-09-17 19:32 UTCEPSS rescore
  42. 2026-09-17 16:04 UTCGHSA enrichment
  43. 2026-09-17 12:20 UTCEG score recompute
  44. 2026-09-17 12:20 UTCGHSA enrichment
  45. 2026-09-17 11:49 UTCEG score recompute
  46. 2026-09-17 11:49 UTCGHSA enrichment
  47. 2026-09-17 08:05 UTCGHSA enrichment
  48. 2026-09-17 04:20 UTCEG score recompute
  49. 2026-09-17 04:20 UTCGHSA enrichment
  50. 2026-09-17 04:05 UTCEG score recompute
  51. 2026-09-17 04:05 UTCGHSA enrichment
  52. 2026-09-17 01:36 UTCGHSA enrichment
  53. 2026-09-16 21:52 UTCGHSA enrichment
  54. 2026-09-16 18:08 UTCEG score recompute
  55. 2026-09-16 18:08 UTCGHSA enrichment
  56. 2026-09-16 14:24 UTCEG score recompute
  57. 2026-09-16 13:28 UTCEG score recompute
  58. 2026-09-16 13:25 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-91843?
CVE-2026-91843 is a critical vulnerability published on September 16, 2026. A stack overflow during the unauthenticated login process may allow an attacker to run arbitrary code remotely with root privileges.
When was CVE-2026-91843 disclosed?
CVE-2026-91843 was first published in the National Vulnerability Database on September 16, 2026, with the most recent update on September 18, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-91843 actively exploited?
CVE-2026-91843 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 58.4% of all scored CVEs.
What is the CVSS score of CVE-2026-91843?
CVE-2026-91843 has a CVSS v3 base score of 9.8 (NVD).
How do I remediate CVE-2026-91843?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-91843, 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-2026-91843

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