CVE-2026-77459
published 2026-10-13CVE-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…
PriorityP263critical9.9CVSS 3.1
AVNACLPRLUINSCCHIHAH
EPSS
0.72%
53.4th percentile
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.
Affected
11 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| argoproj | argo-cd | — | — |
| argoproj | argo-cd | — | — |
| argoproj | argo-cd | — | — |
| argoproj | argo-cd | — | — |
| argoproj | argo-cd | — | — |
| github.com | argoproj_argo-cd_v2 | 2.10.0 – 2.14.21 | — |
| github.com | argoproj_argo-cd_v3 | >= 3.0.0 < 3.3.15 | 3.3.15 |
| github.com | argoproj_argo-cd_v3 | >= 3.4.0 < 3.4.10 | 3.4.10 |
| github.com | argoproj_argo-cd_v3 | >= 3.5.0 < 3.5.4 | 3.5.4 |
| github.com | argoproj_argo-cd_v3 | >= 3.6.0-rc1 < 3.6.0-rc2 | 3.6.0-rc2 |
| openshift-gitops-1 | argocd-rhel9 | — | — |
CVSS provenance
nvdv3.19.9CRITICALCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
vendor_redhat9.9CRITICAL
Stop checking back — get the weekly exploitation signal.
Every Monday: what got weaponized or added to CISA KEV in the last seven days — each CVE cross-linked to its PoC, Nuclei template, and detection rule. Free, one email a week, unsubscribe in one click.
Red Hat
argo-cd: github.com/argoproj/argo-cd/v3: github.com/argoproj/argo-cd/v2: argo-cd: AppProject restrictions bypassed by PreDelete/PostDelete resource hooks
vendor_redhat·2026-10-07·CVSS 9.9
CVE-2026-77459 [CRITICAL] CWE-653 argo-cd: github.com/argoproj/argo-cd/v3: github.com/argoproj/argo-cd/v2: argo-cd: AppProject restrictions bypassed by PreDelete/PostDelete resource hooks
argo-cd: github.com/argoproj/argo-cd/v3: github.com/argoproj/argo-cd/v2: argo-cd: AppProject restrictions bypassed by PreDelete/PostDelete resource hooks
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 c
GHSA
Argo CD: AppProject destination-namespace and resource restrictions bypassed by PreDelete/PostDelete resource hooks
ghsa·2026-10-15
CVE-2026-77459 [CRITICAL] CWE-863 Argo CD: AppProject destination-namespace and resource restrictions bypassed by PreDelete/PostDelete resource hooks
Argo CD: AppProject destination-namespace and resource restrictions bypassed by PreDelete/PostDelete resource hooks
### Impact
Argo CD checks an Application's AppProject before it creates resources during a sync. That check covers destination namespaces and servers, cluster-scoped resource allow and deny lists, and namespaced resource allow and deny lists, including resource names. PreDelete and PostDelete hooks skip it. When the Application is deleted, Argo CD creates those hooks with the application-controller's credentials on the destination cluster.
All versions from v2.10.0 onward are affected, including every currently supported release. v2.9.22 and earlier are not. PostDelete hooks were introduced in [dcc17f70bf](https://github.com/argoproj/argo-cd/commit/dcc17f70bf7db973fe480b8b
No detection rules found.
No public exploits indexed.
https://github.com/argoproj/argo-cd/commit/1149cdc6e932208c4402183cc3d7b7485239940chttps://github.com/argoproj/argo-cd/commit/4bc8085b0a6d2296b849539d3d09fc7be7a4a511https://github.com/argoproj/argo-cd/commit/7f0a05834b05103d69d7c150e1ee36541b314696https://github.com/argoproj/argo-cd/commit/d5dd7019ee65be8895133fe4df554e28074242c4https://github.com/argoproj/argo-cd/releases/tag/v3.3.15https://github.com/argoproj/argo-cd/releases/tag/v3.4.10https://github.com/argoproj/argo-cd/releases/tag/v3.5.4https://github.com/argoproj/argo-cd/releases/tag/v3.6.0-rc2https://github.com/argoproj/argo-cd/security/advisories/GHSA-fmxq-cgp8-87wp
2026-10-13
Published