CVE-2026-77459
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.
- CVSS 3.1
- 9.9
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H - EPSS
- 0.5% chance of exploitation in the next 30 days; higher than 42% of CVEs (scores of 2026-10-25)
- CWE
- CWE-863
- Published
- Modified
- Record from
- the NVD, synced
Packages (OSV)
| Advisory | Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|---|
| GHSA-fmxq-cgp8-87wp | Go | github.com/argoproj/argo-cd/v2 | >=2.10.0 <=2.14.21 | no fix published |
| GHSA-fmxq-cgp8-87wp | Go | github.com/argoproj/argo-cd/v3 | >=3.0.0 <3.3.15 | 3.3.15 |
| GHSA-fmxq-cgp8-87wp | Go | github.com/argoproj/argo-cd/v3 | >=3.4.0 <3.4.10 | 3.4.10 |
| GHSA-fmxq-cgp8-87wp | Go | github.com/argoproj/argo-cd/v3 | >=3.5.0 <3.5.4 | 3.5.4 |
| GHSA-fmxq-cgp8-87wp | Go | github.com/argoproj/argo-cd/v3 | >=3.6.0-rc1 <3.6.0-rc2 | 3.6.0-rc2 |
| GO-2026-6784 | Go | github.com/argoproj/argo-cd | all versions | no fix published |
| GO-2026-6784 | Go | github.com/argoproj/argo-cd/v2 | >=2.10.0 | no fix published |
| GO-2026-6784 | Go | github.com/argoproj/argo-cd/v3 | >=3.0.0 <3.3.15 >=3.4.0 <3.4.10 >=3.5.0 <3.5.4 >=3.6.0-rc1 <3.6.0-rc2 | 3.3.15, 3.4.10, 3.5.4, 3.6.0-rc2 |
References
- https://github.com/argoproj/argo-cd/commit/1149cdc6e932208c4402183cc3d7b7485239940c
- https://github.com/argoproj/argo-cd/commit/4bc8085b0a6d2296b849539d3d09fc7be7a4a511
- https://github.com/argoproj/argo-cd/commit/7f0a05834b05103d69d7c150e1ee36541b314696
- https://github.com/argoproj/argo-cd/commit/d5dd7019ee65be8895133fe4df554e28074242c4
- https://github.com/argoproj/argo-cd/releases/tag/v3.3.15