CVE-2026-93991

HIGHPre-NVD 7.77.7
EchelonGraph scoreMEDIUM confidence

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

Score 7.7 from GitHub Security Advisory (severity: HIGH) published 2026-09-20. A secondary CVSS source baseline 7.7; sources differ by 0.0.

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

Also known asEUVD-2026-83619 (ENISA EUVD) · GHSA-3fwg-9p8x-37mv (GitHub Security Advisories)Source: ENISA EUVD

7.7EG
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: 7.7Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

Argo Workflows versions 4.1.0 through 4.1.3 contain an authorization bypass vulnerability in ListArchivedWorkflows that fails to apply cluster-scoped access review when the metadata.namespace field selector uses the NotEquals operator. Attackers with namespace-scoped list permissions can use a negated namespace field selector to retrieve archived workflows from all other namespaces, exposing spec arguments, parameter values, and annotations.

CVSS v3
7.7
EG Score
7.7HIGHmedium confidence
EG Risk
35
EG Risk 35/100

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)
Severity77% × 45%
Impact severity (EG Severity): CVSS 7.7 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: A fix is available. Apply it within your standard update timelines.
EPSS PROB
0.4%
EPSS %ILE
38th
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 (7.7): severity, escalated by confirmed exploitation. This CVE's 7.7 is its impact severity (EG Severity), not escalated.

EG Severity
7.7 HIGHCVSS-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 2026-11-10). 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.

A fix is available. 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

September 19, 2026

Last Modified

September 22, 2026

Advisory Details (4)

Auto-updated Sep 19, 2026
Patch available. Sources: github, github_commit, github_release.
Web page

GitHub - argoproj/argo-workflows: Workflow Engine for Kubernetes · GitHub

https://github.com/argoproj/argo-workflows
GitHub release Patch Available

v4.1.4

Patch available: argoproj/argo-workflows v4.1.4

https://github.com/argoproj/argo-workflows/releases/tag/v4.1.4
GitHub commit

commit a40972386c09 (argoproj/argo-workflows)

Fix landed in argoproj/argo-workflows commit a40972386c09 — awaiting tagged release

https://github.com/argoproj/argo-workflows/commit/a40972386c097ddf816d2e60e13f058bedca53d9
GitHub advisoryMentions a patch (unverified)

Cross-Namespace IDOR in ListArchivedWorkflows via metadata.namespace!= Field Selector Bypass of NamespaceFilter SAR · Advisory · argoproj/argo-workflows · GitHub

Affected: v4.1.4.

https://github.com/argoproj/argo-workflows/security/advisories/GHSA-q65w-j2vp-47c4

Vendor Advisories for CVE-2026-93991(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 8× in last 7d / 34× 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 139 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 39 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-11-13 16:58 UTCEPSS rescoreEPSS 0.4% · 38th percentile
  2. 2026-11-12 16:35 UTCEPSS rescoreEPSS 0.4% · 38th percentile
  3. 2026-11-11 16:41 UTCEPSS rescoreEPSS 0.4% · 38th percentile
  4. 2026-11-11 10:53 UTCEchelonGraph re-scored
  5. 2026-11-11 10:53 UTCGHSA enrichmentGHSA-3fwg-9p8x-37mv · GitHub severity HIGH · GitHub CVSS 7.7
  6. 2026-11-10 16:46 UTCEPSS rescoreEPSS 0.4% · 38th percentile
  7. 2026-11-09 16:36 UTCEPSS rescoreEPSS 0.4% · 38th percentile
  8. 2026-11-08 16:41 UTCEPSS rescoreEPSS 0.4% · 38th percentile
  9. 2026-11-07 16:40 UTCEPSS rescoreEPSS 0.4% · 38th percentile
  10. 2026-11-06 16:40 UTCEPSS rescoreEPSS 0.4% · 38th percentile
  11. 2026-11-05 16:39 UTCEPSS rescoreEPSS 0.4% · 38th percentile
  12. 2026-11-04 16:37 UTCEPSS rescoreEPSS 0.4% · 38th percentile
  13. 2026-11-04 03:26 UTCEchelonGraph re-scored
  14. 2026-11-04 03:26 UTCGHSA enrichmentGHSA-3fwg-9p8x-37mv · GitHub severity HIGH · GitHub CVSS 7.7
  15. 2026-11-03 16:49 UTCEPSS rescoreEPSS 0.4% · 37th percentile
  16. 2026-11-02 16:46 UTCEPSS rescoreEPSS 0.4% · 37th percentile
  17. 2026-11-01 16:36 UTCEPSS rescoreEPSS 0.4% · 37th percentile
  18. 2026-10-31 16:33 UTCEPSS rescoreEPSS 0.4% · 37th percentile
  19. 2026-10-30 16:35 UTCEPSS rescoreEPSS 0.4% · 37th percentile
  20. 2026-10-29 16:34 UTCEPSS rescoreEPSS 0.4% · 37th percentile
  21. 2026-10-28 16:33 UTCEPSS rescoreEPSS 0.4% · 37th percentile
  22. 2026-10-27 19:59 UTCEchelonGraph re-scored
  23. 2026-10-27 19:59 UTCGHSA enrichmentGHSA-3fwg-9p8x-37mv · GitHub severity HIGH · GitHub CVSS 7.7
  24. 2026-10-27 16:33 UTCEPSS rescoreEPSS 0.4% · 37th percentile
  25. 2026-10-26 16:33 UTCEPSS rescoreEPSS 0.4% · 37th percentile
Show 75 more
  1. 2026-10-25 16:34 UTCEPSS rescoreEPSS 0.4% · 37th percentile
  2. 2026-10-25 13:49 UTCEchelonGraph re-scored
  3. 2026-10-24 16:34 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  4. 2026-10-23 16:33 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  5. 2026-10-22 16:35 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  6. 2026-10-21 16:34 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  7. 2026-10-20 16:34 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  8. 2026-10-20 00:32 UTCEchelonGraph re-scored
  9. 2026-10-20 00:32 UTCGHSA enrichmentGHSA-3fwg-9p8x-37mv · GitHub severity HIGH · GitHub CVSS 7.7
  10. 2026-10-19 16:33 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  11. 2026-10-18 16:33 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  12. 2026-10-18 02:58 UTCEchelonGraph re-scored
  13. 2026-10-17 16:35 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  14. 2026-10-16 16:45 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  15. 2026-10-15 16:33 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  16. 2026-10-14 16:34 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  17. 2026-10-13 16:35 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  18. 2026-10-13 04:22 UTCEchelonGraph re-scored
  19. 2026-10-13 04:21 UTCGHSA enrichmentGHSA-3fwg-9p8x-37mv · GitHub severity HIGH · GitHub CVSS 7.7
  20. 2026-10-12 16:35 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  21. 2026-10-12 14:42 UTCEchelonGraph re-scored
  22. 2026-10-12 01:43 UTCGHSA enrichmentGHSA-3fwg-9p8x-37mv · GitHub severity HIGH · GitHub CVSS 7.7
  23. 2026-10-11 19:12 UTCEchelonGraph re-scored
  24. 2026-10-11 16:28 UTCEchelonGraph re-scored
  25. 2026-10-11 13:50 UTCEPSS rescoreEPSS 0.4% · 35th percentile
  26. 2026-10-11 13:41 UTCEchelonGraph re-scored
  27. 2026-10-11 11:44 UTCEchelonGraph re-scored
  28. 2026-10-11 11:43 UTCGHSA enrichmentGHSA-3fwg-9p8x-37mv · GitHub severity HIGH · GitHub CVSS 7.7
  29. 2026-10-10 23:01 UTCEchelonGraph re-scored
  30. 2026-10-10 23:01 UTCGHSA enrichmentGHSA-3fwg-9p8x-37mv · GitHub severity HIGH · GitHub CVSS 7.7
  31. 2026-10-10 20:00 UTCEPSS rescoreEPSS 0.4% · 35th percentile
  32. 2026-10-10 10:20 UTCGHSA enrichmentGHSA-3fwg-9p8x-37mv · GitHub severity HIGH · GitHub CVSS 7.7
  33. 2026-10-09 21:38 UTCEchelonGraph re-scored
  34. 2026-10-09 21:37 UTCGHSA enrichmentGHSA-3fwg-9p8x-37mv · GitHub severity HIGH · GitHub CVSS 7.7
  35. 2026-10-09 20:08 UTCEPSS rescoreEPSS 0.4% · 35th percentile
  36. 2026-10-09 08:56 UTCGHSA enrichmentGHSA-3fwg-9p8x-37mv · GitHub severity HIGH · GitHub CVSS 7.7
  37. 2026-10-08 20:13 UTCEchelonGraph re-scored
  38. 2026-10-08 20:13 UTCGHSA enrichmentGHSA-3fwg-9p8x-37mv · GitHub severity HIGH · GitHub CVSS 7.7
  39. 2026-10-08 17:14 UTCEPSS rescoreEPSS 0.4% · 35th percentile
  40. 2026-10-08 06:36 UTCEchelonGraph re-scored
  41. 2026-10-08 06:36 UTCGHSA enrichmentGHSA-3fwg-9p8x-37mv · GitHub severity HIGH · GitHub CVSS 7.7
  42. 2026-10-07 23:48 UTCEPSS rescoreEPSS 0.4% · 35th percentile
  43. 2026-10-07 17:55 UTCGHSA enrichmentGHSA-3fwg-9p8x-37mv · GitHub severity HIGH · GitHub CVSS 7.7
  44. 2026-10-07 04:22 UTCGHSA enrichmentGHSA-3fwg-9p8x-37mv · GitHub severity HIGH · GitHub CVSS 7.7
  45. 2026-10-06 15:41 UTCEchelonGraph re-scored
  46. 2026-10-06 15:41 UTCGHSA enrichmentGHSA-3fwg-9p8x-37mv · GitHub severity HIGH · GitHub CVSS 7.7
  47. 2026-10-06 15:19 UTCEPSS rescoreEPSS 0.4% · 35th percentile
  48. 2026-10-06 02:36 UTCEchelonGraph re-scored
  49. 2026-10-06 02:36 UTCGHSA enrichmentGHSA-3fwg-9p8x-37mv · GitHub severity HIGH · GitHub CVSS 7.7
  50. 2026-10-05 17:44 UTCEPSS rescoreEPSS 0.4% · 35th percentile
  51. 2026-10-05 13:53 UTCGHSA enrichmentGHSA-3fwg-9p8x-37mv · GitHub severity HIGH · GitHub CVSS 7.7
  52. 2026-10-05 01:13 UTCEchelonGraph re-scored
  53. 2026-10-05 01:13 UTCGHSA enrichmentGHSA-3fwg-9p8x-37mv · GitHub severity HIGH · GitHub CVSS 7.7
  54. 2026-10-04 23:23 UTCEPSS rescoreEPSS 0.4% · 35th percentile
  55. 2026-10-04 12:32 UTCGHSA enrichmentGHSA-3fwg-9p8x-37mv · GitHub severity HIGH · GitHub CVSS 7.7
  56. 2026-10-03 23:51 UTCEchelonGraph re-scored
  57. 2026-10-03 23:50 UTCGHSA enrichmentGHSA-3fwg-9p8x-37mv · GitHub severity HIGH · GitHub CVSS 7.7
  58. 2026-10-03 14:26 UTCEPSS rescoreEPSS 0.4% · 35th percentile
  59. 2026-10-03 11:09 UTCGHSA enrichmentGHSA-3fwg-9p8x-37mv · GitHub severity HIGH · GitHub CVSS 7.7
  60. 2026-10-02 22:26 UTCEchelonGraph re-scored
  61. 2026-10-02 22:26 UTCGHSA enrichmentGHSA-3fwg-9p8x-37mv · GitHub severity HIGH · GitHub CVSS 7.7
  62. 2026-10-02 17:57 UTCEPSS rescoreEPSS 0.4% · 35th percentile
  63. 2026-10-02 09:45 UTCGHSA enrichmentGHSA-3fwg-9p8x-37mv · GitHub severity HIGH · GitHub CVSS 7.7
  64. 2026-10-01 21:05 UTCEchelonGraph re-scored
  65. 2026-10-01 21:04 UTCGHSA enrichmentGHSA-3fwg-9p8x-37mv · GitHub severity HIGH · GitHub CVSS 7.7
  66. 2026-10-01 19:51 UTCEPSS rescoreEPSS 0.4% · 35th percentile
  67. 2026-10-01 08:23 UTCGHSA enrichmentGHSA-3fwg-9p8x-37mv · GitHub severity HIGH · GitHub CVSS 7.7
  68. 2026-09-30 19:41 UTCEchelonGraph re-scored
  69. 2026-09-30 19:41 UTCGHSA enrichmentGHSA-3fwg-9p8x-37mv · GitHub severity HIGH · GitHub CVSS 7.7
  70. 2026-09-30 15:04 UTCEPSS rescoreEPSS 0.4% · 35th percentile
  71. 2026-09-30 07:01 UTCGHSA enrichmentGHSA-3fwg-9p8x-37mv · GitHub severity HIGH · GitHub CVSS 7.7
  72. 2026-09-29 18:19 UTCEchelonGraph re-scored
  73. 2026-09-29 18:19 UTCGHSA enrichmentGHSA-3fwg-9p8x-37mv · GitHub severity HIGH · GitHub CVSS 7.7
  74. 2026-09-29 04:53 UTCEchelonGraph re-scored
  75. 2026-09-29 04:53 UTCGHSA enrichmentGHSA-3fwg-9p8x-37mv · GitHub severity HIGH · GitHub CVSS 7.7

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-93991?
CVE-2026-93991 is a high-severity vulnerability; its CVE record was published on September 19, 2026. Argo Workflows versions 4.1.0 through 4.1.3 contain an authorization bypass vulnerability in ListArchivedWorkflows that fails to apply cluster-scoped access review when the metadata.namespace field selector uses the NotEquals operator. Attackers with namespace-scoped list permissions can use a…
When was CVE-2026-93991 made public?
CVE-2026-93991 was made public on September 18, 2026: that is the date its CVE record's CNA, VulnCheck, gives for when the vulnerability was made public. The CVE record itself was published on September 19, 2026. EchelonGraph's copy of the record carries a last-modified date of September 22, 2026; the record at its source may have been updated since.
Is CVE-2026-93991 actively exploited?
CVE-2026-93991 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.4% probability of exploitation in the next 30 days (38th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-93991?
CVE-2026-93991 has a CVSS base score of 7.7 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-93991?
A fix for CVE-2026-93991 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-93991 are linked in the Vendor Advisories panel on this page.

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