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CVE-2026-77459

Status: Awaiting AnalysisCritical (9.9)—
Severity9.9Critical · CVSS 3.1
Exploitation probability0.72 %higher than 53% of CVEs
Active exploitationNonot in the CISA catalog
Public exploitNot knownno public code found

News and reports on Orbitaley

Argo CD is a declarative, GitOps continuous delivery tool for Kubernetes. From 2.10.0 until 3.3.15, 3.4.10, 3.5.4, and 3.6.0-rc2, Argo CD creates PostDelete resource hooks without applying the AppProject destination and resource authorization checks used during ordinary synchronization. The omitted checks include cluster-scoped and namespaced resource allow/deny lists.

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A user who can write to an Application's Git repository can commit a delete hook targeting a forbidden namespace, server, group, kind, or resource name, and deletion of the Application causes the application-controller to create that resource with its destination-cluster credentials. The reachable impact is bounded by the controller's cluster access but can include cluster-scoped resources, disallowed namespaces, persistent hook objects, and secondary objects created by a hook Job. PreSync, Sync, PostSync, and SyncFail hooks continue to use the normal project checks. This issue is fixed in versions 3.3.15, 3.4.10, 3.5.4, and 3.6.0-rc2.

CVSS

Base score
9.9
Version
3.1
Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

Exploitation probability (EPSS)

Probability of exploitation in the next 30 days
0.72 %
Percentile among all scored CVEs
53
Score date
10/20/2026

EPSS (Exploit Prediction Scoring System, FIRST) estimates how likely a vulnerability is to be exploited in the wild within 30 days. It complements CVSS (impact) and CISA KEV (confirmed exploitation).

ATT&CK techniques

How this vulnerability is exploited and what the attacker gains, in MITRE ATT&CK terms.

Vector AV:N/PR:L: un usuario con escritura en el repositorio Git crea hooks PostDelete que el controlador ejecuta con sus credenciales de clúster, saltando las comprobaciones del AppProject.

Inferred by our analysis agent from the official description, CVSS vector and CWE, and checked by a supervisor. May contain errors.

ATT&CK mitigations that cover these techniques

Network SegmentationVulnerability ScanningUser Account ManagementThreat Intelligence ProgramPrivileged Account ManagementLimit Access to Resource Over Network

Affected technologies (1)

⚠ AI-inferred from the description — NVD hasn't analyzed this CVE yet, these aren't verified CPEs.

Argoproj — Argo CDAI

CWEs

References

Show 9 references

Raw JSON (NVD)

Show
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  "lastModified": "2026-10-16T16:00:33.533",
  "sourceIdentifier": "security-advisories@github.com"
}