CVE-2026-77459 (GCVE-0-2026-77459)
Vulnerability from cvelistv5 – Published: 2026-10-13 16:26 – Updated: 2026-10-14 15:29
VLAI
EPSS
VEX
Title
Argo CD: AppProject destination-namespace and resource restrictions bypassed by PreDelete/PostDelete resource hooks
Summary
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. 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.
Severity
9.9 (Critical)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-14 15:27 UTC
CWE
- CWE-863 - Incorrect Authorization
Assigner
References
9 references
| URL | Tags |
|---|---|
| https://github.com/argoproj/argo-cd/security/advi… | x_refsource_CONFIRM |
| https://github.com/argoproj/argo-cd/commit/1149cd… | x_refsource_MISC |
| https://github.com/argoproj/argo-cd/commit/4bc808… | x_refsource_MISC |
| https://github.com/argoproj/argo-cd/commit/7f0a05… | x_refsource_MISC |
| https://github.com/argoproj/argo-cd/commit/d5dd70… | x_refsource_MISC |
| https://github.com/argoproj/argo-cd/releases/tag/… | x_refsource_MISC |
| https://github.com/argoproj/argo-cd/releases/tag/… | x_refsource_MISC |
| https://github.com/argoproj/argo-cd/releases/tag/v3.5.4 | x_refsource_MISC |
| https://github.com/argoproj/argo-cd/releases/tag/… | x_refsource_MISC |
Impacted products
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Related by attack behaviour
Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.