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Vulnerability · CVE-2026-55797

Argo CD repo-server command injection via crafted SSH repository SOCKS5 proxy URL

Published Oct 9, 2026 · corrected/updated Oct 16, 2026 · evidence confidence high

### Impact Argo CD runs a shell command in the repo-server when it clones or fetches an SSH Git repository that has a proxy URL. The proxy host and port are copied into an SSH . A host that contains shell metacharacters breaks out of that command and runs in the repo-server. All versions from v2.11.0 onward are affected, including every currently supported release. v2.10.20 and earlier are not. The behavior was introduced in [9b27aeb1a4](https://github.com/argoproj/argo-cd/commit/9b27aeb1a4fb15d11a0f01cad65dea1fdfc60205) (2024-01-09, [#15864](https://github.com/argoproj/argo-cd/pull/15864)), the change that added SOCKS5 proxy support for SSH Git URLs, and was first released in v2.11.0. The repository must use SSH. , , and proxy URLs all take this path when they are set on an SSH repository. An HTTPS Git repository uses the proxy as an HTTP proxy and does not build this command. Anyone who can create or update a repository or a repository credential template can set the proxy. That includes a project-scoped repository permission, , and a repository Secret. A credential template applies its proxy to every matching SSH repository that does not have its own credentials. Argo CD runs the command when it tests the repository connection and on later fetches. The process can read other Git, Helm, and OCI credentials stored for the repo-server. ### Patches A patch for this vulnerability has been released in the following Argo CD versions: * v3.6.0-rc2 * v3.5.4 * v3.4.10 * v3.3.15 The fix stops passing the proxy host and port through a shell. Argo CD 2.x and 3.0 through 3.2 are out of support and will not receive a patch. Upgrade to a patched 3.3 or newer release. ### Workarounds There is no setting that keeps SSH repository proxies and removes the shell command. * Do not grant repository create or update to untrusted users, including project-scoped repository access. See [RBAC resources](https://argo-cd.readthedocs.io/en/stable/operator-manual/rbac/#rbac-model-structure) and

Grounded briefings

Catalog interpretations for three audiences. Each brief cites ingested metadata and the original advisories below. They are not independent research and they do not invent exploit steps.

Executive

CVE-2026-55797 is a high public vulnerability record for this product. It is not currently listed in the CISA Known Exploited catalog. Check the linked vendor or CERT advisories for patch status. This summary is a catalog interpretation of the ingested metadata and cites the original advisories below.

System administrator

Identify whether this product is in your estate, then compare installed versions with the affected ranges. Affected packages or ranges on record: github.com/argoproj/argo-cd/v2 (2.11.0 → 2.14.21); github.com/argoproj/argo-cd/v3 (3.0.0 → 3.3.15); github.com/argoproj/argo-cd/v3 (3.4.0 → 3.4.10); github.com/argoproj/argo-cd/v3 (3.5.0 → 3.5.4). Check the linked vendor or CERT advisories for patch status. Prefer the vendor or distribution advisory linked in Sources before changing production systems. This is a catalog interpretation, not a runbook.

Security analyst

Signals on file: CVSS 8.8, EPSS 1.5%. It is not currently listed in the CISA Known Exploited catalog. Weakness classes: CWE-78. Sources contributing to this record: cve_org, epss, go_vulndb. Public exploit references, when present, are outbound links only and are not proof of active exploitation. This is a catalog interpretation of stored metadata.

Exploitation and remediation

  • Exploitation evidence

    Not listed as known exploited in CISA KEV. Not in CISA KEV or VulnCheck KEV.

  • Patch and remediation

    No required-action text is stored yet. Use the vendor or CERT links in Sources for patch availability.

  • Safe detection guidance

    Compare installed versions with the affected ranges below and verify the advisory from the original publisher. This site stores metadata and outbound links only; it does not ship exploit code or proof-of-concept payloads.

Code

The project this record applies to. Exploit listings stay in References.

Timeline

Detection, updates, and resolution for this record.

  1. Oct 9, 2026 · Go Vulnerability Database

    Detected

    ### Impact Argo CD runs a shell command in the repo-server when it clones or fetches an SSH Git repository that has a proxy URL. The proxy host and port are copied into an SSH . A host that contains shell metacharacters breaks out of that command and runs in the repo-server. All versions from v2.11.0 onward are affected, including every currently supported release. v2.10.20 and earlier are not. Th

  2. Oct 16, 2026 · Go Vulnerability Database

    Fix available

    github.com/argoproj/argo-cd/v3 fixed in 3.3.15; github.com/argoproj/argo-cd/v3 fixed in 3.4.10; github.com/argoproj/argo-cd/v3 fixed in 3.5.4; github.com/argoproj/argo-cd/v3 fixed in 3.6.0-rc2

  3. Oct 16, 2026 · Go Vulnerability Database

    Fix available

    github.com/argoproj/argo-cd/v2 fixed in 2.14.21

  4. Oct 16, 2026 · Go Vulnerability Database

    Fix available

    github.com/argoproj/argo-cd/v3 fixed in 3.3.15

  5. Oct 16, 2026 · Go Vulnerability Database

    Fix available

    github.com/argoproj/argo-cd/v3 fixed in 3.4.10

  6. Oct 16, 2026 · Go Vulnerability Database

    Fix available

    github.com/argoproj/argo-cd/v3 fixed in 3.5.4

  7. Oct 16, 2026 · Go Vulnerability Database

    Fix available

    github.com/argoproj/argo-cd/v3 fixed in 3.6.0-rc2

  8. Oct 16, 2026 · Go Vulnerability Database

    Updated

    ### Impact Argo CD runs a shell command in the repo-server when it clones or fetches an SSH Git repository that has a proxy URL. The proxy host and port are copied into an SSH . A host that contains shell metacharacters breaks out of that command and runs in the repo-server. All versions from v2.11.0 onward are affected, including every currently supported release. v2.10.20 and earlier are not. Th

Affected

  • Go github.com/argoproj/argo-cd/v22.11.0 → 2.14.21
  • Go github.com/argoproj/argo-cd/v33.0.0 → 3.3.15
  • Go github.com/argoproj/argo-cd/v33.4.0 → 3.4.10
  • Go github.com/argoproj/argo-cd/v33.5.0 → 3.5.4
  • Go github.com/argoproj/argo-cd/v33.6.0-rc1 → 3.6.0-rc2

Sources

References