CVE-2026-42880

CRITICALPre-NVD 9.69.6—
EchelonGraph scoreMEDIUM confidence

This critical-severity CVE scores 9.6 under NVD CVSS v3. EPSS exploit probability: 0.4%, top 70% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, nvd
Elevated
9.6
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 1%CVSS: 9.6Exploit: NoneExposed: 0

A fix is available — apply it.

Argo CD is a declarative, GitOps continuous delivery tool for Kubernetes. From versions 3.2.0 to before 3.2.11 and 3.3.0 to before 3.3.9, there is a missing authorization and data-masking gap in Argo CD's ServerSideDiff endpoint that allows an attacker with read-only access to extract plaintext Kubernetes Secret data from etcd via the Kubernetes API server's Server-Side Apply dry-run mechanism. This issue has been patched in versions 3.2.11 and 3.3.9.

CVSS v3
9.6
EG Score
9.6(medium)
EG Risk
—
EPSS
40.2%
KEV
Not listed

Published

May 7, 2026

Last Modified

July 20, 2026

Advisory Details (1)

Auto-updated May 7, 2026
🔬 Proof of concept available. Patch available. Sources: github.
github Patch Available🟡 PoC Available

Kubernetes Secret Extraction via ArgoCD ServerSideDiff · Advisory · argoproj/argo-cd · GitHub

https://github.com/argoproj/argo-cd/security/advisories/GHSA-3v3m-wc6v-x4x3

Vendor Advisories for CVE-2026-42880(3)

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

Patch Availability(3)

Vendor / EcosystemFixed in / PatchReleasedSource
redhatopenshift-gitops-1/argocd-image-updater-rhel8:17792114122026-05-26redhat
redhatopenshift-gitops-1/gitops-rhel9-operator:17792846852026-05-26redhat
redhatopenshift-gitops-1/argocd-rhel9:17769427992026-04-30redhat

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Affected Packages

(1 across 1 ecosystem)
Go(1)
PackageVulnerable rangeFixed inDependents
github.com/argoproj/argo-cd/v3—3.3.9—

Weakness Classification(3)

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

Data Freshness Timeline

(refreshed 8× in last 7d / 36× 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.

Showing the most recent 100 of 158 total refreshes for this CVE.

  1. 2026-07-22 14:08 UTCEPSS rescore
  2. 2026-07-21 15:24 UTCEPSS rescore
  3. 2026-07-20 17:08 UTCEPSS rescore
  4. 2026-07-19 14:31 UTCEPSS rescore
  5. 2026-07-19 02:29 UTCEPSS rescore
  6. 2026-07-18 10:04 UTCEPSS rescore
  7. 2026-07-16 17:03 UTCEPSS rescore
  8. 2026-07-16 09:53 UTCOSV refresh
  9. 2026-07-15 16:57 UTCEPSS rescore
  10. 2026-07-15 02:00 UTCEPSS rescore
  11. 2026-07-13 22:30 UTCEPSS rescore
  12. 2026-07-13 06:13 UTCEPSS rescore
  13. 2026-07-12 05:46 UTCEPSS rescore
  14. 2026-07-11 08:27 UTCEPSS rescore
  15. 2026-07-09 19:10 UTCEPSS rescore
  16. 2026-07-08 15:16 UTCEPSS rescore
  17. 2026-07-07 13:46 UTCEPSS rescore
  18. 2026-07-06 16:27 UTCEPSS rescore
  19. 2026-07-06 16:27 UTCEPSS rescore
  20. 2026-07-06 02:23 UTCEPSS rescore
  21. 2026-07-06 02:23 UTCEPSS rescore
  22. 2026-07-05 02:30 UTCEPSS rescore
  23. 2026-07-04 06:31 UTCEPSS rescore
  24. 2026-07-01 15:06 UTCEPSS rescore
  25. 2026-06-30 23:22 UTCEPSS rescore
Show 75 more
  1. 2026-06-29 14:06 UTCEPSS rescore
  2. 2026-06-28 14:07 UTCEPSS rescore
  3. 2026-06-28 09:00 UTCVendor advisory
  4. 2026-06-28 04:56 UTCEPSS rescore
  5. 2026-06-27 14:18 UTCVendor advisory
  6. 2026-06-27 03:08 UTCEPSS rescore
  7. 2026-06-26 22:05 UTCVendor advisory
  8. 2026-06-25 13:49 UTCEPSS rescore
  9. 2026-06-25 13:49 UTCEPSS rescore
  10. 2026-06-24 14:05 UTCEPSS rescore
  11. 2026-06-23 21:33 UTCEPSS rescore
  12. 2026-06-22 14:25 UTCEPSS rescore
  13. 2026-06-22 14:25 UTCEPSS rescore
  14. 2026-06-21 14:56 UTCEPSS rescore
  15. 2026-06-21 14:56 UTCEPSS rescore
  16. 2026-06-21 01:59 UTCEPSS rescore
  17. 2026-06-19 19:25 UTCEPSS rescore
  18. 2026-06-18 17:52 UTCEPSS rescore
  19. 2026-06-18 17:52 UTCEPSS rescore
  20. 2026-06-17 17:53 UTCEPSS rescore
  21. 2026-06-17 02:35 UTCVendor advisory
  22. 2026-06-16 17:52 UTCEPSS rescore
  23. 2026-06-15 17:49 UTCEPSS rescore
  24. 2026-06-15 05:49 UTCVendor advisory
  25. 2026-06-15 01:27 UTCVendor advisory
  26. 2026-06-14 20:57 UTCVendor advisory
  27. 2026-06-14 16:35 UTCVendor advisory
  28. 2026-06-14 12:13 UTCVendor advisory
  29. 2026-06-14 07:50 UTCVendor advisory
  30. 2026-06-14 03:29 UTCVendor advisory
  31. 2026-06-13 23:00 UTCEPSS rescore
  32. 2026-06-13 01:25 UTCVendor advisory
  33. 2026-06-12 23:12 UTCEPSS rescore
  34. 2026-06-12 23:12 UTCEPSS rescore
  35. 2026-06-12 21:01 UTCVendor advisory
  36. 2026-06-12 10:40 UTCVendor advisory
  37. 2026-06-12 06:19 UTCVendor advisory
  38. 2026-06-12 01:58 UTCVendor advisory
  39. 2026-06-11 21:36 UTCVendor advisory
  40. 2026-06-11 17:15 UTCVendor advisory
  41. 2026-06-11 14:00 UTCEPSS rescore
  42. 2026-06-11 11:16 UTCVendor advisory
  43. 2026-06-11 06:45 UTCVendor advisory
  44. 2026-06-11 02:24 UTCVendor advisory
  45. 2026-06-10 22:18 UTCEPSS rescore
  46. 2026-06-10 21:59 UTCVendor advisory
  47. 2026-06-10 17:38 UTCVendor advisory
  48. 2026-06-10 13:22 UTCEPSS rescore
  49. 2026-06-10 13:22 UTCEPSS rescore
  50. 2026-06-10 13:17 UTCVendor advisory
  51. 2026-06-10 08:56 UTCVendor advisory
  52. 2026-06-10 04:35 UTCVendor advisory
  53. 2026-06-10 00:12 UTCVendor advisory
  54. 2026-06-09 19:51 UTCVendor advisory
  55. 2026-06-09 15:29 UTCVendor advisory
  56. 2026-06-09 11:08 UTCVendor advisory
  57. 2026-06-09 06:47 UTCVendor advisory
  58. 2026-06-09 02:23 UTCVendor advisory
  59. 2026-06-08 21:54 UTCVendor advisory
  60. 2026-06-08 14:17 UTCEPSS rescore
  61. 2026-06-08 14:17 UTCEPSS rescore
  62. 2026-06-08 12:00 UTCVendor advisory
  63. 2026-06-08 07:38 UTCVendor advisory
  64. 2026-06-08 03:17 UTCVendor advisory
  65. 2026-06-07 22:56 UTCVendor advisory
  66. 2026-06-07 18:35 UTCVendor advisory
  67. 2026-06-07 15:25 UTCEPSS rescore
  68. 2026-06-07 15:25 UTCEPSS rescore
  69. 2026-06-07 14:14 UTCVendor advisory
  70. 2026-06-07 09:53 UTCVendor advisory
  71. 2026-06-07 05:27 UTCVendor advisory
  72. 2026-06-07 01:06 UTCVendor advisory
  73. 2026-06-06 20:45 UTCVendor advisory
  74. 2026-06-06 16:23 UTCVendor advisory
  75. 2026-06-06 13:47 UTCEPSS rescore

Related CVEs(same vendor + same CWE)

Frequently asked(5)

What is CVE-2026-42880?
CVE-2026-42880 is a critical vulnerability published on May 7, 2026. Argo CD is a declarative, GitOps continuous delivery tool for Kubernetes. From versions 3.2.0 to before 3.2.11 and 3.3.0 to before 3.3.9, there is a missing authorization and data-masking gap in Argo CD's ServerSideDiff endpoint that allows an attacker with read-only access to extract plaintext…
When was CVE-2026-42880 disclosed?
CVE-2026-42880 was first published in the National Vulnerability Database on May 7, 2026, with the most recent update on July 20, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-42880 actively exploited?
CVE-2026-42880 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 40.2% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-42880?
CVE-2026-42880 has a CVSS v3 base score of 9.6 (NVD).
How do I remediate CVE-2026-42880?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-42880, 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

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