CVE-2026-50191

HIGHPre-NVD 8.88.8
EchelonGraph scoreMEDIUM confidence

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

This high-severity CVE scores 8.8 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.5% (39th percentile of EPSS-scored CVEs). No GitHub Security Advisory CVSS is on record for this CVE.

Triggered by: Headline CVSS from a secondary CVSS source
Sources: EPSS, a secondary CVSS source
8.8EG
EchelonGraph verdictPlan a fixRemediate within your standard update timelines (the SSVC decision on this page).
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0.5%CVSS: 8.8Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

4gaBoards is a boards system for realtime project management. Prior to 3.3.8, 4gaBoards is vulnerable to pre-account takeover when registrationEnabled, localRegistrationEnabled, and ssoRegistrationEnabled are enabled and Google, GitHub, Microsoft, or OIDC SSO is configured. The POST /api/register endpoint permits creation of an unverified local account with a victim's email address, and POST /api/access-tokens permits that account to authenticate while isVerified is false. During the victim's first SSO login, server/api/helpers/users/get-create-one-for-github-sso.js, server/api/helpers/users/get-create-one-for-google-sso.js, server/api/helpers/users/get-create-one-for-microsoft-sso.js, and server/api/helpers/users/get-create-one-for-oidc-sso.js find the attacker-controlled account by email and link the verified SSO identity without confirming ownership of the local account. The attacker can retain local-password access to the linked account and obtain the victim's projects, data, and permissions. This issue is fixed in version 3.3.8.

CVSS v3
8.8
EG Score
8.8HIGHmedium confidence
EG Risk
40
EG Risk 40/100

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)
Severity88% × 45%
The EG Score, 8.8 of 10.
Exploitation0.5% × 40%
FIRST EPSS: the 30-day exploitation probability when EchelonGraph scored this CVE.
Automatability0% × 15%
CISA's SSVC Automatable value: no (Vulnrichment).
SSVC (CISA's decision table, applied by EchelonGraph): Track at low or medium mission impact; Track* at high (mission-essential systems).
Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact total (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.
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; Track* at high (mission-essential systems).

A fix is available. Apply it within your standard update timelines.

Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact total (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; Fix on system upgrade if it is not.

In CISA KEV no (CISA's KEV catalog) · Automatable no (CISA Vulnrichment) · Technical impact total (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

August 18, 2026

Last Modified

September 9, 2026

Advisory Details (3)

Auto-updated Aug 18, 2026
Patch available. Sources: github, github_commit, github_release.
GitHub release Patch Available

4ga Boards 3.3.8

Patch available: RARgames/4gaBoards v3.3.8

https://github.com/RARgames/4gaBoards/releases/tag/v3.3.8
GitHub commit Patch Available

commit 484c92d583cf (RARgames/4gaBoards)

Patch available: RARgames/4gaBoards v3.3.8 (contains commit 484c92d583cf)

https://github.com/RARgames/4gaBoards/commit/484c92d583cfbc6815f96364071bb531ec594bf8
GitHub advisoryMentions a patch (unverified)

Pre-Account Takeover via SSO Email Linkage in 4gaBoards · Advisory · RARgames/4gaBoards · GitHub

https://github.com/RARgames/4gaBoards/security/advisories/GHSA-f3p6-chc6-pc77

Weakness Classification(2)

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

Data Freshness Timeline

(refreshed 12× in last 7d / 50× 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.

  1. 2026-10-13 16:34 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  2. 2026-10-12 16:34 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  3. 2026-10-12 15:59 UTCEG score recompute
  4. 2026-10-11 19:42 UTCEG score recompute
  5. 2026-10-11 16:57 UTCEG score recompute
  6. 2026-10-11 14:21 UTCEG score recompute
  7. 2026-10-11 13:49 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 17:12 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  11. 2026-10-08 08:59 UTCEG score recompute
  12. 2026-10-07 23:48 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  13. 2026-10-06 21:24 UTCEG score recompute
  14. 2026-10-06 15:18 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  15. 2026-10-06 08:03 UTCEG score recompute
  16. 2026-10-05 17:43 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  17. 2026-10-05 10:23 UTCEG score recompute
  18. 2026-10-04 23:22 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  19. 2026-10-03 17:16 UTCEG score recompute
  20. 2026-10-03 14:26 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  21. 2026-10-03 04:15 UTCEG score recompute
  22. 2026-10-02 17:56 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  23. 2026-10-02 01:22 UTCEG score recompute
  24. 2026-10-01 19:50 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  25. 2026-09-30 21:47 UTCEG score recompute
Show 73 more
  1. 2026-09-30 15:03 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  2. 2026-09-30 08:54 UTCEG score recompute
  3. 2026-09-28 22:04 UTCEG score recompute
  4. 2026-09-28 13:51 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  5. 2026-09-27 20:15 UTCEG score recompute
  6. 2026-09-27 13:48 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  7. 2026-09-27 07:18 UTCEG score recompute
  8. 2026-09-26 15:59 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  9. 2026-09-26 00:27 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  10. 2026-09-25 02:26 UTCEG score recompute
  11. 2026-09-24 00:31 UTCEG score recompute
  12. 2026-09-23 17:53 UTCEPSS rescoreEPSS 0.3% · 26th percentile
  13. 2026-09-22 22:42 UTCEG score recompute
  14. 2026-09-22 09:48 UTCEG score recompute
  15. 2026-09-21 07:58 UTCEG score recompute
  16. 2026-09-20 20:16 UTCEPSS rescoreEPSS 0.3% · 26th percentile
  17. 2026-09-19 16:05 UTCEG score recompute
  18. 2026-09-19 02:52 UTCEG score recompute
  19. 2026-09-18 19:28 UTCEPSS rescoreEPSS 0.3% · 26th percentile
  20. 2026-09-18 00:59 UTCEG score recompute
  21. 2026-09-16 23:11 UTCEG score recompute
  22. 2026-09-16 14:08 UTCEPSS rescoreEPSS 0.3% · 25th percentile
  23. 2026-09-16 10:17 UTCEG score recompute
  24. 2026-09-16 05:15 UTCEPSS rescoreEPSS 0.3% · 25th percentile
  25. 2026-09-15 08:29 UTCEG score recompute
  26. 2026-09-13 17:46 UTCEG score recompute
  27. 2026-09-13 16:47 UTCEPSS rescoreEPSS 0.3% · 25th percentile
  28. 2026-09-12 15:58 UTCEG score recompute
  29. 2026-09-12 03:04 UTCEG score recompute
  30. 2026-09-11 14:53 UTCEPSS rescoreEPSS 0.3% · 25th percentile
  31. 2026-09-11 14:08 UTCEG score recompute
  32. 2026-09-10 12:19 UTCEG score recompute
  33. 2026-09-10 09:35 UTCEPSS rescoreEPSS 0.3% · 25th percentile
  34. 2026-09-09 02:45 UTCEG score recompute
  35. 2026-09-08 22:01 UTCEPSS rescoreEPSS 0.3% · 25th percentile
  36. 2026-09-07 21:11 UTCEG score recompute
  37. 2026-09-07 16:01 UTCEPSS rescoreEPSS 0.3% · 25th percentile
  38. 2026-09-06 18:45 UTCEG score recompute
  39. 2026-09-06 13:47 UTCEPSS rescoreEPSS 0.3% · 25th percentile
  40. 2026-09-05 16:57 UTCEG score recompute
  41. 2026-09-04 14:58 UTCEG score recompute
  42. 2026-09-04 05:06 UTCEPSS rescoreEPSS 0.3% · 25th percentile
  43. 2026-09-03 00:10 UTCEG score recompute
  44. 2026-09-02 14:12 UTCEPSS rescoreEPSS 0.3% · 25th percentile
  45. 2026-09-01 21:54 UTCEG score recompute
  46. 2026-09-01 13:54 UTCEPSS rescoreEPSS 0.3% · 25th percentile
  47. 2026-09-01 09:00 UTCEG score recompute
  48. 2026-09-01 04:40 UTCEPSS rescoreEPSS 0.3% · 25th percentile
  49. 2026-08-31 06:29 UTCEG score recompute
  50. 2026-08-30 19:17 UTCEPSS rescoreEPSS 0.3% · 25th percentile
  51. 2026-08-30 04:36 UTCEG score recompute
  52. 2026-08-30 01:22 UTCEPSS rescoreEPSS 0.3% · 25th percentile
  53. 2026-08-29 02:43 UTCEG score recompute
  54. 2026-08-28 21:41 UTCEPSS rescoreEPSS 0.3% · 25th percentile
  55. 2026-08-27 20:53 UTCEG score recompute
  56. 2026-08-27 14:25 UTCEPSS rescoreEPSS 0.3% · 25th percentile
  57. 2026-08-26 19:04 UTCEG score recompute
  58. 2026-08-26 14:46 UTCEPSS rescoreEPSS 0.3% · 25th percentile
  59. 2026-08-25 17:15 UTCEG score recompute
  60. 2026-08-25 13:49 UTCEPSS rescoreEPSS 0.3% · 25th percentile
  61. 2026-08-24 15:28 UTCEG score recompute
  62. 2026-08-23 00:45 UTCEG score recompute
  63. 2026-08-23 00:19 UTCEPSS rescoreEPSS 0.3% · 25th percentile
  64. 2026-08-22 11:51 UTCEG score recompute
  65. 2026-08-21 23:49 UTCEPSS rescoreEPSS 0.3% · 25th percentile
  66. 2026-08-21 10:02 UTCEG score recompute
  67. 2026-08-20 22:55 UTCEPSS rescoreEPSS 0.3% · 25th percentile
  68. 2026-08-19 19:20 UTCEG score recompute
  69. 2026-08-19 18:23 UTCEG score recompute
  70. 2026-08-19 17:04 UTCEPSS rescoreEPSS 0.3% · 25th percentile
  71. 2026-08-18 22:23 UTCEG score recompute
  72. 2026-08-18 21:38 UTCEG score recomputeFirst assessed: 8.8 HIGH
  73. 2026-08-18 21:38 UTCMITRE cvelistV5first tracked

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Frequently asked(5)

What is CVE-2026-50191?
CVE-2026-50191 is a high-severity vulnerability; its CVE record was published on August 18, 2026. 4gaBoards is a boards system for realtime project management. Prior to 3.3.8, 4gaBoards is vulnerable to pre-account takeover when registrationEnabled, localRegistrationEnabled, and ssoRegistrationEnabled are enabled and Google, GitHub, Microsoft, or OIDC SSO is configured. The POST /api/register…
When was the CVE record for CVE-2026-50191 published?
The CVE record for CVE-2026-50191 was published on August 18, 2026. That is the record's publication date; the vulnerability itself may have been made public earlier. EchelonGraph's copy of the record carries a last-modified date of September 9, 2026; the record at its source may have been updated since.
Is CVE-2026-50191 actively exploited?
CVE-2026-50191 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-2026-50191?
CVE-2026-50191 has a CVSS base score of 8.8 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-50191?
A fix for CVE-2026-50191 is available: update to the fixed version the vendor names in its advisory.

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