CVE-2026-17191

CRITICALPre-NVD 9.19.1
EchelonGraph scoreMEDIUM confidence

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

Score 9.1 from GitHub Security Advisory (severity: HIGH) published 2026-07-27. A secondary CVSS source baseline 9.1; sources differ by 0.0.

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

Also known asEUVD-2026-49371 (ENISA EUVD) · GHSA-h4j3-v76m-hmm4 (GitHub Security Advisories)Source: ENISA EUVD

9.1EG
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: 0.4%CVSS: 9.1Exploit: None knownExposed services: Not assessed

These vulnerabilities have been fixed in the following releases: * VCO 5.2.3.14 and later in the 5.2 train (from the CVE record's solution, Arista Networks, Inc.) — apply it.

An input validation vulnerability exists in an API component of the orchestrator. An authenticated user can exploit this flaw to manipulate backend queries, which may result in unauthorized access to data beyond their intended privileges and cause the underlying system to initiate unintended outbound network connections.

This issue was discovered internally by Arista and the company is not aware of any malicious uses of this issue in customer networks.

CVSS v3
9.1
EG Score
9.1CRITICALmedium confidence
EG Risk
41
EG Risk 41/100

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)
Severity91% × 45%
Impact severity (EG Severity): CVSS 9.1 of 10. Never the KEV-floored or EPSS-lifted EG Score.
Exploitation0.4% × 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 every mission impact level.
Exploitation none (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: These vulnerabilities have been fixed in the following releases: * VCO 5.2.3.14 and later in the 5.2 train (from the CVE record's solution, Arista Networks, Inc.). Apply it within your standard update timelines.
EPSS PROB
0.4%
EPSS %ILE
29th
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 (9.1): severity, escalated by confirmed exploitation. This CVE's 9.1 is its impact severity (EG Severity), not escalated.

EG Severity
9.1 CRITICALCVSS-B, impact only: no KEV listing, EPSS or EG-KEV tier raises it.GitHub Security Advisory CVSS
EG Likelihood
0.4% within 30 daysSource: FIRST EPSS (model v2026.06.15, score date 2026-11-12). 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 every mission impact level.CISA BOD 26-04: 60 days if the affected system is publicly exposed; Fix on system upgrade if it is not.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 every mission impact level.

These vulnerabilities have been fixed in the following releases: * VCO 5.2.3.14 and later in the 5.2 train (from the CVE record's solution, Arista Networks, Inc.). Apply it within your standard update timelines.

Exploitation none (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.

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

July 27, 2026

Last Modified

October 24, 2026

Advisory Details (1)

Auto-updated Sep 16, 2026
Fix named in the CVE record's solution (Arista Networks, Inc.).

Vendor Advisories for CVE-2026-17191(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 13× in last 7d / 57× 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 its CVE.org record (CNA or CISA ADP). 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). "EchelonGraph re-scored" is our own recompute of this CVE's score, not an update from a source, and is not counted in the refreshes above. Most recent first.

Showing the most recent 100 of 480 rows 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. None are among the latest 100 rows. The 380 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-11-12 23:42 UTCEchelonGraph re-scored
  2. 2026-11-12 23:42 UTCGHSA enrichmentGHSA-h4j3-v76m-hmm4 · GitHub severity HIGH · GitHub CVSS 9.1
  3. 2026-11-12 16:33 UTCEPSS rescoreEPSS 0.4% · 29th percentile
  4. 2026-11-11 23:04 UTCEchelonGraph re-scored
  5. 2026-11-11 23:04 UTCGHSA enrichmentGHSA-h4j3-v76m-hmm4 · GitHub severity HIGH · GitHub CVSS 9.1
  6. 2026-11-11 16:38 UTCEPSS rescoreEPSS 0.4% · 29th percentile
  7. 2026-11-10 22:26 UTCEchelonGraph re-scored
  8. 2026-11-10 22:26 UTCGHSA enrichmentGHSA-h4j3-v76m-hmm4 · GitHub severity HIGH · GitHub CVSS 9.1
  9. 2026-11-10 16:42 UTCEPSS rescoreEPSS 0.4% · 28th percentile
  10. 2026-11-09 21:29 UTCEchelonGraph re-scored
  11. 2026-11-09 21:29 UTCGHSA enrichmentGHSA-h4j3-v76m-hmm4 · GitHub severity HIGH · GitHub CVSS 9.1
  12. 2026-11-09 16:34 UTCEPSS rescoreEPSS 0.4% · 28th percentile
  13. 2026-11-08 20:51 UTCEchelonGraph re-scored
  14. 2026-11-08 20:51 UTCGHSA enrichmentGHSA-h4j3-v76m-hmm4 · GitHub severity HIGH · GitHub CVSS 9.1
  15. 2026-11-08 16:38 UTCEPSS rescoreEPSS 0.4% · 28th percentile
  16. 2026-11-07 20:13 UTCEchelonGraph re-scored
  17. 2026-11-07 20:13 UTCGHSA enrichmentGHSA-h4j3-v76m-hmm4 · GitHub severity HIGH · GitHub CVSS 9.1
  18. 2026-11-07 16:38 UTCEPSS rescoreEPSS 0.4% · 28th percentile
  19. 2026-11-06 19:33 UTCEchelonGraph re-scored
  20. 2026-11-06 19:33 UTCGHSA enrichmentGHSA-h4j3-v76m-hmm4 · GitHub severity HIGH · GitHub CVSS 9.1
  21. 2026-11-05 18:54 UTCEchelonGraph re-scored
  22. 2026-11-05 18:54 UTCGHSA enrichmentGHSA-h4j3-v76m-hmm4 · GitHub severity HIGH · GitHub CVSS 9.1
  23. 2026-11-04 18:16 UTCEchelonGraph re-scored
  24. 2026-11-04 18:16 UTCGHSA enrichmentGHSA-h4j3-v76m-hmm4 · GitHub severity HIGH · GitHub CVSS 9.1
  25. 2026-11-04 16:34 UTCEPSS rescoreEPSS 0.4% · 28th percentile
Show 75 more
  1. 2026-11-03 17:37 UTCEchelonGraph re-scored
  2. 2026-11-03 17:37 UTCGHSA enrichmentGHSA-h4j3-v76m-hmm4 · GitHub severity HIGH · GitHub CVSS 9.1
  3. 2026-11-03 16:47 UTCEPSS rescoreEPSS 0.4% · 28th percentile
  4. 2026-11-02 16:58 UTCEchelonGraph re-scored
  5. 2026-11-02 16:58 UTCGHSA enrichmentGHSA-h4j3-v76m-hmm4 · GitHub severity HIGH · GitHub CVSS 9.1
  6. 2026-11-02 16:44 UTCEPSS rescoreEPSS 0.4% · 28th percentile
  7. 2026-11-01 16:34 UTCEPSS rescoreEPSS 0.4% · 28th percentile
  8. 2026-11-01 16:19 UTCEchelonGraph re-scored
  9. 2026-11-01 16:19 UTCGHSA enrichmentGHSA-h4j3-v76m-hmm4 · GitHub severity HIGH · GitHub CVSS 9.1
  10. 2026-10-31 16:32 UTCEPSS rescoreEPSS 0.4% · 28th percentile
  11. 2026-10-31 15:34 UTCEchelonGraph re-scored
  12. 2026-10-31 15:34 UTCGHSA enrichmentGHSA-h4j3-v76m-hmm4 · GitHub severity HIGH · GitHub CVSS 9.1
  13. 2026-10-30 16:33 UTCEPSS rescoreEPSS 0.4% · 28th percentile
  14. 2026-10-30 14:56 UTCEchelonGraph re-scored
  15. 2026-10-30 14:56 UTCGHSA enrichmentGHSA-h4j3-v76m-hmm4 · GitHub severity HIGH · GitHub CVSS 9.1
  16. 2026-10-29 16:32 UTCEPSS rescoreEPSS 0.4% · 28th percentile
  17. 2026-10-29 14:18 UTCEchelonGraph re-scored
  18. 2026-10-29 14:18 UTCGHSA enrichmentGHSA-h4j3-v76m-hmm4 · GitHub severity HIGH · GitHub CVSS 9.1
  19. 2026-10-28 16:31 UTCEPSS rescoreEPSS 0.4% · 28th percentile
  20. 2026-10-28 13:40 UTCEchelonGraph re-scored
  21. 2026-10-28 13:40 UTCGHSA enrichmentGHSA-h4j3-v76m-hmm4 · GitHub severity HIGH · GitHub CVSS 9.1
  22. 2026-10-27 16:31 UTCEPSS rescoreEPSS 0.4% · 28th percentile
  23. 2026-10-27 12:49 UTCEchelonGraph re-scored
  24. 2026-10-27 12:49 UTCGHSA enrichmentGHSA-h4j3-v76m-hmm4 · GitHub severity HIGH · GitHub CVSS 9.1
  25. 2026-10-26 16:31 UTCEPSS rescoreEPSS 0.4% · 28th percentile
  26. 2026-10-26 15:25 UTCEchelonGraph re-scored
  27. 2026-10-26 15:25 UTCGHSA enrichmentGHSA-h4j3-v76m-hmm4 · GitHub severity HIGH · GitHub CVSS 9.1
  28. 2026-10-25 16:32 UTCEPSS rescoreEPSS 0.4% · 28th percentile
  29. 2026-10-25 14:05 UTCEchelonGraph re-scored
  30. 2026-10-25 14:05 UTCGHSA enrichmentGHSA-h4j3-v76m-hmm4 · GitHub severity HIGH · GitHub CVSS 9.1
  31. 2026-10-24 16:32 UTCEPSS rescoreEPSS 0.4% · 27th percentile
  32. 2026-10-24 13:26 UTCEchelonGraph re-scored
  33. 2026-10-24 13:26 UTCGHSA enrichmentGHSA-h4j3-v76m-hmm4 · GitHub severity HIGH · GitHub CVSS 9.1
  34. 2026-10-23 16:31 UTCEPSS rescoreEPSS 0.4% · 27th percentile
  35. 2026-10-23 14:39 UTCEchelonGraph re-scored
  36. 2026-10-23 14:39 UTCGHSA enrichmentGHSA-h4j3-v76m-hmm4 · GitHub severity HIGH · GitHub CVSS 9.1
  37. 2026-10-22 16:34 UTCEPSS rescoreEPSS 0.4% · 27th percentile
  38. 2026-10-22 13:59 UTCEchelonGraph re-scored
  39. 2026-10-22 13:58 UTCGHSA enrichmentGHSA-h4j3-v76m-hmm4 · GitHub severity HIGH · GitHub CVSS 9.1
  40. 2026-10-21 16:32 UTCEPSS rescoreEPSS 0.4% · 27th percentile
  41. 2026-10-21 13:19 UTCEchelonGraph re-scored
  42. 2026-10-21 13:19 UTCGHSA enrichmentGHSA-h4j3-v76m-hmm4 · GitHub severity HIGH · GitHub CVSS 9.1
  43. 2026-10-20 16:32 UTCEPSS rescoreEPSS 0.4% · 27th percentile
  44. 2026-10-20 12:39 UTCEchelonGraph re-scored
  45. 2026-10-20 12:38 UTCGHSA enrichmentGHSA-h4j3-v76m-hmm4 · GitHub severity HIGH · GitHub CVSS 9.1
  46. 2026-10-19 16:31 UTCEPSS rescoreEPSS 0.4% · 27th percentile
  47. 2026-10-19 11:59 UTCEchelonGraph re-scored
  48. 2026-10-19 11:59 UTCGHSA enrichmentGHSA-h4j3-v76m-hmm4 · GitHub severity HIGH · GitHub CVSS 9.1
  49. 2026-10-18 16:31 UTCEPSS rescoreEPSS 0.4% · 27th percentile
  50. 2026-10-18 10:08 UTCGHSA enrichmentGHSA-h4j3-v76m-hmm4 · GitHub severity HIGH · GitHub CVSS 9.1
  51. 2026-10-18 04:00 UTCEchelonGraph re-scored
  52. 2026-10-17 16:33 UTCEPSS rescoreEPSS 0.4% · 27th percentile
  53. 2026-10-17 08:37 UTCEchelonGraph re-scored
  54. 2026-10-17 08:37 UTCGHSA enrichmentGHSA-h4j3-v76m-hmm4 · GitHub severity HIGH · GitHub CVSS 9.1
  55. 2026-10-16 16:40 UTCEPSS rescoreEPSS 0.4% · 27th percentile
  56. 2026-10-16 07:58 UTCEchelonGraph re-scored
  57. 2026-10-16 07:58 UTCGHSA enrichmentGHSA-h4j3-v76m-hmm4 · GitHub severity HIGH · GitHub CVSS 9.1
  58. 2026-10-15 16:31 UTCEPSS rescoreEPSS 0.4% · 27th percentile
  59. 2026-10-15 06:59 UTCEchelonGraph re-scored
  60. 2026-10-15 06:59 UTCGHSA enrichmentGHSA-h4j3-v76m-hmm4 · GitHub severity HIGH · GitHub CVSS 9.1
  61. 2026-10-14 16:32 UTCEPSS rescoreEPSS 0.4% · 26th percentile
  62. 2026-10-14 02:48 UTCEchelonGraph re-scored
  63. 2026-10-14 02:48 UTCGHSA enrichmentGHSA-h4j3-v76m-hmm4 · GitHub severity HIGH · GitHub CVSS 9.1
  64. 2026-10-13 16:33 UTCEPSS rescoreEPSS 0.4% · 26th percentile
  65. 2026-10-12 22:55 UTCEchelonGraph re-scored
  66. 2026-10-12 22:55 UTCGHSA enrichmentGHSA-h4j3-v76m-hmm4 · GitHub severity HIGH · GitHub CVSS 9.1
  67. 2026-10-12 16:33 UTCEPSS rescoreEPSS 0.4% · 26th percentile
  68. 2026-10-12 16:29 UTCEchelonGraph re-scored
  69. 2026-10-12 09:31 UTCGHSA enrichmentGHSA-h4j3-v76m-hmm4 · GitHub severity HIGH · GitHub CVSS 9.1
  70. 2026-10-11 20:08 UTCEchelonGraph re-scored
  71. 2026-10-11 17:21 UTCEchelonGraph re-scored
  72. 2026-10-11 14:53 UTCEchelonGraph re-scored
  73. 2026-10-11 13:48 UTCEPSS rescoreEPSS 0.4% · 26th percentile
  74. 2026-10-10 19:59 UTCEPSS rescoreEPSS 0.4% · 26th percentile
  75. 2026-10-09 20:06 UTCEPSS rescoreEPSS 0.4% · 26th percentile

Frequently asked(5)

What is CVE-2026-17191?
CVE-2026-17191 is a critical-severity vulnerability; its CVE record was published on July 27, 2026. An input validation vulnerability exists in an API component of the orchestrator. An authenticated user can exploit this flaw to manipulate backend queries, which may result in unauthorized access to data beyond their intended privileges and cause the underlying system to initiate unintended…
When was CVE-2026-17191 made public?
CVE-2026-17191 was made public on July 27, 2026: that is the date its CVE record's CNA, Arista Networks, Inc., gives for when the vulnerability was made public. The CVE record itself was published on July 27, 2026. EchelonGraph's copy of the record carries a last-modified date of October 24, 2026; the record at its source may have been updated since.
Is CVE-2026-17191 actively exploited?
CVE-2026-17191 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.4% probability of exploitation in the next 30 days (29th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-17191?
CVE-2026-17191 has a CVSS base score of 9.1 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-17191?
The CVE record's solution for CVE-2026-17191, written by its CNA Arista Networks, Inc., names the fix: "These vulnerabilities have been fixed in the following releases: * VCO 5.2.3.14 and later in the 5.2 train". The vendor advisories EchelonGraph has for CVE-2026-17191 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

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