CVE-2026-94031

MEDIUMPre-NVD 6.36.3
EchelonGraph scoreMEDIUM confidence

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

Score 6.3 from GitHub Security Advisory (severity: LOW) published 2026-09-20. A secondary CVSS source baseline 6.3; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: EPSS, GitHub Security Advisory, a secondary CVSS source
Elevated

Also known asEUVD-2026-83747 (ENISA EUVD) · GHSA-c2f2-x95m-p9vw (GitHub Security Advisories)Source: ENISA EUVD

6.3EG
EchelonGraph verdictPlan mitigationNo fix is confirmed yet: check the vendor's advisory for a fixed release; until one is applied, restrict network exposure of the affected system or apply the vendor's mitigation on your normal schedule (the SSVC decision on this page).
  • CISA's Vulnrichment rates exploitation as PoC; EchelonGraph holds no exploit-code reference for it
CISA-KEV: Not listedEPSS PROB: 1.1%CVSS: 6.3Exploit: No code on recordExposed services: Not assessed

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

A vulnerability was detected in 0-Gaurav-0 nexus-mcp aed0026e7ac1f23dc940e46e9fd3a2da6904f914. Affected by this issue is the function child_process.exec of the file src/auth/browser.ts of the component nexus_reauth MCP tool. The manipulation of the argument url results in command injection. The attack may be performed from remote. The exploit is now public and may be used. This product utilizes a rolling release system for continuous delivery, and as such, version information for affected or updated releases is not disclosed. The project was informed of the problem early through an issue report but has not responded yet.

CVSS v3
6.3
EG Score
6.3MEDIUMmedium confidence
EG Risk
44
EG Risk 44/100

EG Risk is EchelonGraph's 0–100 priority score. It fuses impact severity (EG Severity, the CVSS base score, never the KEV-floored or EPSS-lifted EG Score) with real-world exploitation and automatability, under weights EchelonGraph set by hand, so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner.

How it’s computed (value × EchelonGraph’s weight)
Severity63% × 45%
Impact severity (EG Severity): CVSS 6.3 of 10. Never the KEV-floored or EPSS-lifted EG Score.
Exploitation40% × 40%
EchelonGraph's fixed weight for EG-KEV Tier 3 (Elevated): a constant, not a probability.
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 public PoC (CISA Vulnrichment) · Automatable no (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: No fix is confirmed yet. Check the vendor's advisory for a fixed release; until one is applied, restrict network exposure of the affected system or apply the vendor's mitigation on your normal schedule.
EPSS PROB
1.1%
EPSS %ILE
64th
KEV
Not listed

What the EG score is made of (scorer v4.0: the three questions the 0–10 score mixes, published apart · methodology)

The EG score (6.3): severity, escalated by confirmed exploitation. This CVE's 6.3 is its impact severity (EG Severity), not escalated.

EG Severity
6.3 MEDIUMCVSS-B, impact only: no KEV listing, EPSS or EG-KEV tier raises it.GitHub Security Advisory CVSS
EG Likelihood
1.1% within 30 daysSource: FIRST EPSS (model v2026.06.15, score date 2026-10-24). FIRST's exploitation probability, not an EchelonGraph model.
Confirmed exploitation
None on record (CISA KEV, EG-KEV Tier 1)Reported apart from the likelihood: an observed fact, not a probability.
EG Priority
SSVC Track at medium mission impactTrack at low or medium mission impact; Track* at high (mission-essential systems).CISA BOD 26-04: 60 days if the affected system is publicly exposed; Fix on system upgrade if it is not.No released fix is confirmed on this page, but CISA's timeline does not wait for a fix's release: it starts when an agency identifies the flaw on an asset and updates the CDM Agency and Federal Dashboard, and the directive counts patching, decommissioning the system or another action as remediation. Until a fixed release is applied, mitigate as this page's verdict says. In the directive's words, “Fix on system upgrade” means that, “unless conditions change”, the vulnerability “should be remediated the next time the vulnerable asset receives a scheduled major upgrade or rebuild”: its timelines are “dynamic as facts change”, and a KEV listing shortens them.Each input and its source, and whom BOD 26-04 binds: the SSVC and BOD 26-04 blocks below.

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

No fix is confirmed yet. Check the vendor's advisory for a fixed release; until one is applied, restrict network exposure of the affected system or apply the vendor's mitigation on your normal schedule.

Exploitation public PoC (CISA Vulnrichment) · Automatable no (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)60 days if the affected system is publicly exposed; Fix on system upgrade if it is not.

No released fix is confirmed on this page, but CISA's timeline does not wait for a fix's release: it starts when an agency identifies the flaw on an asset and updates the CDM Agency and Federal Dashboard, and the directive counts patching, decommissioning the system or another action as remediation. Until a fixed release is applied, mitigate as this page's verdict says. In the directive's words, “Fix on system upgrade” means that, “unless conditions change”, the vulnerability “should be remediated the next time the vulnerable asset receives a scheduled major upgrade or rebuild”: its timelines are “dynamic as facts change”, and a KEV listing shortens them.

The score's inputs: In CISA KEV no (CISA's KEV catalog) · Automatable no (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

September 20, 2026

Last Modified

September 21, 2026

Advisory Details (3)

Auto-updated Sep 20, 2026
No fix on record yet.
Web page

Command Injection Vulnerability in nexus-mcp · Issue #1 · Xh1Xxhg/public_exp · GitHub

https://github.com/Xh1Xxhg/public_exp/issues/1
Web page

Command Injection Vulnerability in nexus-mcp · Issue #1 · 0-Gaurav-0/nexus-mcp · GitHub

https://github.com/0-Gaurav-0/nexus-mcp/issues/1
Web page

GitHub - 0-Gaurav-0/nexus-mcp: Universal multi-AI gateway MCP server · GitHub

https://github.com/0-Gaurav-0/nexus-mcp/

Vendor Advisories for CVE-2026-94031(1)

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

Weakness Classification(2)

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

Data Freshness Timeline

(refreshed 7× in last 7d / 54× 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.

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 99 is merged into the row it repeats.

  1. 2026-11-02 16:46 UTCEPSS rescoreEPSS 1.1% · 64th percentile
  2. 2026-10-31 16:33 UTCEPSS rescoreEPSS 1.1% · 64th percentile
  3. 2026-10-30 16:35 UTCEPSS rescoreEPSS 1.1% · 64th percentile
  4. 2026-10-29 16:34 UTCEPSS rescoreEPSS 1.1% · 64th percentile
  5. 2026-10-28 16:33 UTCEPSS rescoreEPSS 1.1% · 64th percentile
  6. 2026-10-28 15:25 UTCOSV refresh
  7. 2026-10-27 16:33 UTCEPSS rescoreEPSS 1.1% · 64th percentile
  8. 2026-10-26 16:33 UTCEPSS rescoreEPSS 1.1% · 64th percentile
  9. 2026-10-25 16:34 UTCEPSS rescoreEPSS 1.1% · 64th percentile
  10. 2026-10-25 13:49 UTCEG score recompute
  11. 2026-10-24 16:34 UTCEPSS rescoreEPSS 1.1% · 64th percentile
  12. 2026-10-23 16:33 UTCEPSS rescoreEPSS 1.1% · 64th percentile
  13. 2026-10-22 16:35 UTCEPSS rescoreEPSS 1.1% · 64th percentile
  14. 2026-10-21 16:34 UTCEPSS rescoreEPSS 1.1% · 64th percentile
  15. 2026-10-20 16:34 UTCEPSS rescoreEPSS 1.1% · 64th percentile
  16. 2026-10-20 15:33 UTCEG score recompute
  17. 2026-10-20 15:33 UTCGHSA enrichmentGHSA-c2f2-x95m-p9vw · GitHub severity LOW · GitHub CVSS 6.3
  18. 2026-10-19 16:33 UTCEPSS rescoreEPSS 1.1% · 64th percentile
  19. 2026-10-18 16:33 UTCEPSS rescoreEPSS 1.1% · 64th percentile
  20. 2026-10-18 02:58 UTCEG score recompute
  21. 2026-10-17 16:35 UTCEPSS rescoreEPSS 1.1% · 64th percentile
  22. 2026-10-16 16:45 UTCEPSS rescoreEPSS 1.1% · 64th percentile
  23. 2026-10-15 16:33 UTCEPSS rescoreEPSS 1.1% · 64th percentile
  24. 2026-10-14 16:34 UTCEPSS rescoreEPSS 1.1% · 64th percentile
  25. 2026-10-13 16:35 UTCEPSS rescoreEPSS 1.1% · 63rd percentile
Show 73 more
  1. 2026-10-12 16:35 UTCEPSS rescoreEPSS 1.1% · 63rd percentile
  2. 2026-10-12 14:42 UTCEG score recompute
  3. 2026-10-11 19:12 UTCEG score recompute
  4. 2026-10-11 16:28 UTCEG score recompute
  5. 2026-10-11 13:50 UTCEPSS rescoreEPSS 1.1% · 63rd percentile
  6. 2026-10-11 13:41 UTCEG score recompute
  7. 2026-10-11 08:51 UTCEG score recompute
  8. 2026-10-11 08:50 UTCGHSA enrichmentGHSA-c2f2-x95m-p9vw · GitHub severity LOW · GitHub CVSS 6.3
  9. 2026-10-10 20:00 UTCEPSS rescoreEPSS 1.1% · 63rd percentile
  10. 2026-10-10 08:03 UTCEG score recompute
  11. 2026-10-10 08:03 UTCGHSA enrichmentGHSA-c2f2-x95m-p9vw · GitHub severity LOW · GitHub CVSS 6.3
  12. 2026-10-09 20:08 UTCEPSS rescoreEPSS 1.1% · 63rd percentile
  13. 2026-10-09 07:16 UTCEG score recompute
  14. 2026-10-09 07:16 UTCGHSA enrichmentGHSA-c2f2-x95m-p9vw · GitHub severity LOW · GitHub CVSS 6.3
  15. 2026-10-08 17:14 UTCEPSS rescoreEPSS 1.1% · 63rd percentile
  16. 2026-10-08 06:31 UTCEG score recompute
  17. 2026-10-08 06:31 UTCGHSA enrichmentGHSA-c2f2-x95m-p9vw · GitHub severity LOW · GitHub CVSS 6.3
  18. 2026-10-07 23:48 UTCEPSS rescoreEPSS 1.1% · 63rd percentile
  19. 2026-10-07 05:45 UTCEG score recompute
  20. 2026-10-07 05:45 UTCGHSA enrichmentGHSA-c2f2-x95m-p9vw · GitHub severity LOW · GitHub CVSS 6.3
  21. 2026-10-06 15:19 UTCEPSS rescoreEPSS 1.1% · 63rd percentile
  22. 2026-10-06 04:59 UTCEG score recompute
  23. 2026-10-06 04:58 UTCGHSA enrichmentGHSA-c2f2-x95m-p9vw · GitHub severity LOW · GitHub CVSS 6.3
  24. 2026-10-05 17:44 UTCEPSS rescoreEPSS 1.1% · 63rd percentile
  25. 2026-10-05 04:13 UTCEG score recompute
  26. 2026-10-05 04:13 UTCGHSA enrichmentGHSA-c2f2-x95m-p9vw · GitHub severity LOW · GitHub CVSS 6.3
  27. 2026-10-04 23:23 UTCEPSS rescoreEPSS 1.1% · 63rd percentile
  28. 2026-10-04 03:26 UTCEG score recompute
  29. 2026-10-04 03:25 UTCGHSA enrichmentGHSA-c2f2-x95m-p9vw · GitHub severity LOW · GitHub CVSS 6.3
  30. 2026-10-03 14:26 UTCEPSS rescoreEPSS 1.1% · 63rd percentile
  31. 2026-10-03 02:40 UTCEG score recompute
  32. 2026-10-03 02:40 UTCGHSA enrichmentGHSA-c2f2-x95m-p9vw · GitHub severity LOW · GitHub CVSS 6.3
  33. 2026-10-02 17:57 UTCEPSS rescoreEPSS 1.1% · 63rd percentile
  34. 2026-10-02 01:54 UTCEG score recompute
  35. 2026-10-02 01:54 UTCGHSA enrichmentGHSA-c2f2-x95m-p9vw · GitHub severity LOW · GitHub CVSS 6.3
  36. 2026-10-01 19:51 UTCEPSS rescoreEPSS 1.1% · 63rd percentile
  37. 2026-10-01 01:08 UTCEG score recompute
  38. 2026-10-01 01:08 UTCGHSA enrichmentGHSA-c2f2-x95m-p9vw · GitHub severity LOW · GitHub CVSS 6.3
  39. 2026-09-30 15:04 UTCEPSS rescoreEPSS 1.1% · 63rd percentile
  40. 2026-09-30 00:22 UTCEG score recompute
  41. 2026-09-30 00:22 UTCGHSA enrichmentGHSA-c2f2-x95m-p9vw · GitHub severity LOW · GitHub CVSS 6.3
  42. 2026-09-28 22:58 UTCEG score recompute
  43. 2026-09-28 22:58 UTCGHSA enrichmentGHSA-c2f2-x95m-p9vw · GitHub severity LOW · GitHub CVSS 6.3
  44. 2026-09-28 13:52 UTCEPSS rescoreEPSS 1.1% · 63rd percentile
  45. 2026-09-27 22:13 UTCEG score recompute
  46. 2026-09-27 22:12 UTCGHSA enrichmentGHSA-c2f2-x95m-p9vw · GitHub severity LOW · GitHub CVSS 6.3
  47. 2026-09-27 13:49 UTCEPSS rescoreEPSS 1.1% · 63rd percentile
  48. 2026-09-26 21:26 UTCEG score recompute
  49. 2026-09-26 21:26 UTCGHSA enrichmentGHSA-c2f2-x95m-p9vw · GitHub severity LOW · GitHub CVSS 6.3
  50. 2026-09-26 15:59 UTCEPSS rescoreEPSS 1.1% · 63rd percentile
  51. 2026-09-25 20:41 UTCGHSA enrichmentGHSA-c2f2-x95m-p9vw · GitHub severity LOW · GitHub CVSS 6.3
  52. 2026-09-24 19:54 UTCEG score recompute
  53. 2026-09-24 19:54 UTCGHSA enrichmentGHSA-c2f2-x95m-p9vw · GitHub severity LOW · GitHub CVSS 6.3
  54. 2026-09-24 14:04 UTCEPSS rescoreEPSS 1.8% · 77th percentile
  55. 2026-09-23 19:08 UTCEG score recompute
  56. 2026-09-23 19:08 UTCGHSA enrichmentGHSA-c2f2-x95m-p9vw · GitHub severity LOW · GitHub CVSS 6.3
  57. 2026-09-23 17:54 UTCEPSS rescoreEPSS 1.1% · 63rd percentile
  58. 2026-09-22 18:11 UTCEG score recompute
  59. 2026-09-22 18:11 UTCGHSA enrichmentGHSA-c2f2-x95m-p9vw · GitHub severity LOW · GitHub CVSS 6.3
  60. 2026-09-22 16:01 UTCEPSS rescoreEPSS 1.1% · 63rd percentile
  61. 2026-09-21 21:09 UTCEPSS rescoreEPSS 1.1% · 62nd percentile
  62. 2026-09-21 17:26 UTCEG score recompute
  63. 2026-09-21 17:26 UTCGHSA enrichmentGHSA-c2f2-x95m-p9vw · GitHub severity LOW · GitHub CVSS 6.3
  64. 2026-09-21 17:25 UTCNVD updateCVSS v4 → 2.1
  65. 2026-09-21 16:50 UTCEG score recompute
  66. 2026-09-21 16:50 UTCGHSA enrichmentGHSA-c2f2-x95m-p9vw · GitHub severity LOW · GitHub CVSS 6.3
  67. 2026-09-21 16:50 UTCMITRE cvelistV5CVSS v4 → 5.3
  68. 2026-09-21 13:40 UTCEG score recompute
  69. 2026-09-21 13:40 UTCGHSA enrichmentGHSA-c2f2-x95m-p9vw · GitHub severity LOW · GitHub CVSS 6.3
  70. 2026-09-20 14:29 UTCEG score recompute
  71. 2026-09-20 14:28 UTCNVD updateCVSS v4 → 2.1
  72. 2026-09-20 14:16 UTCEG score recomputeFirst assessed: 6.3 MEDIUM
  73. 2026-09-20 14:16 UTCMITRE cvelistV5first tracked

Frequently asked(5)

What is CVE-2026-94031?
CVE-2026-94031 is a medium-severity vulnerability; its CVE record was published on September 20, 2026. A vulnerability was detected in 0-Gaurav-0 nexus-mcp aed0026e7ac1f23dc940e46e9fd3a2da6904f914. Affected by this issue is the function child_process.exec of the file src/auth/browser.ts of the component nexus_reauth MCP tool. The manipulation of the argument url results in command injection. The…
When was the CVE record for CVE-2026-94031 published?
The CVE record for CVE-2026-94031 was published on September 20, 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 21, 2026; the record at its source may have been updated since.
Is CVE-2026-94031 actively exploited?
CVE-2026-94031 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 1.1% probability of exploitation in the next 30 days (64th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-94031?
CVE-2026-94031 has a CVSS base score of 6.3 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-94031?
No fix for CVE-2026-94031 is confirmed yet. Until one is published, restrict network exposure of the affected system or apply the vendor's mitigation — for example, keep it off the internet or limit it to trusted networks — and watch the vendor's advisory for the fix. The vendor advisories EchelonGraph has for CVE-2026-94031 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

Explore the affected products and dependency analysis for CVE-2026-94031

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