CVE-2026-77459Critical· 9.9▾ MidnightArgo 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 authoriz…
▾ Midnight zone — Critical, or high with PoC / in-the-wild
impact 54.5 · likelihood 0.1 · exploitation 0
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Stakeholder-Specific Vulnerability Categorization from CISA's ADP record at CVE.org: whether exploitation is observed, whether an attack can be automated, and how much of the system is at stake.
Exploit-prediction probability, daily snapshots since Oct 15.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via NVD
0.7%
Last analysed / modified upstream
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.
Refer to the linked advisories for vendor-supplied fixes and affected version ranges.
Affected packages:
github.com/argoproj/argo-cd/v2 >= 2.10.0, <= 2.14.21github.com/argoproj/argo-cd/v3 >= 3.0.0, < 3.3.15github.com/argoproj/argo-cd/v3 >= 3.4.0, < 3.4.10github.com/argoproj/argo-cd/v3 >= 3.5.0, < 3.5.4github.com/argoproj/argo-cd/v3 >= 3.6.0-rc1, < 3.6.0-rc2Patched in:
github.com/argoproj/argo-cd/v3 3.3.15github.com/argoproj/argo-cd/v3 3.4.10github.com/argoproj/argo-cd/v3 3.5.4github.com/argoproj/argo-cd/v3 3.6.0-rc2Source: https://github.com/advisories/GHSA-fmxq-cgp8-87wp
Connected by shared product, vendor, weakness, or advisory.
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