Symlink following allows leaking out-of-bound manifests and JSON files from Argo CD repo-server

Summary

Argo CD is a declarative, GitOps continuous delivery tool for Kubernetes. Argo CD starting with version 0.7.0 and prior to versions 2.1.15m 2.2.9, and 2.3.4 is vulnerable to a symlink following bug allowing a malicious user with repository write access to leak sensitive files from Argo CD's repo-server. A malicious Argo CD user with write access for a repository which is (or may be) used in a directory-type Application may commit a symlink which points to an out-of-bounds file. Sensitive files which could be leaked include manifest files from other Applications' source repositories (potentially decrypted files, if you are using a decryption plugin) or any JSON-formatted secrets which have been mounted as files on the repo-server. A patch for this vulnerability has been released in Argo CD versions 2.3.4, 2.2.9, and 2.1.15. Users of versions 2.3.0 or above who do not have any Jsonnet/directory-type Applications may disable the Jsonnet/directory config management tool as a workaround.

Timeline

1. May 20, 2022, 1:55 PM UTCCVE published
2. Apr 23, 2025, 2:07 PM UTCCISA SSVC assessment

   Exploitation: none · Automatable: no · Technical impact: partial

3. Apr 23, 2025, 6:25 PM UTCRecord last updated

Affected versions

• argoproj argo-cd

  From 0.7.0 · fixed in 2.1.15; From 2.2.0 · fixed in 2.2.9; From 2.3.0 · fixed in 2.3.4

• github.com/argoproj/argo-cdGo

  All versions

• github.com/argoproj/argo-cd/v2Go

  fixed in 2.1.15; From 2.2.0 · fixed in 2.2.9; From 2.3.0 · fixed in 2.3.4

• github.com/argoproj/argo-cd/v2Go

  fixed in 2.1.15

• github.com/argoproj/argo-cd/v2Go

  From 2.2.0 · fixed in 2.2.9

• github.com/argoproj/argo-cd/v2Go

  From 2.3.0 · fixed in 2.3.4

References 4