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Vulnerabilities

Vulnerability · CVE-2026-55797

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

Published Oct 9, 2026 · catalog updated Oct 16, 2026 · Argo CD repo-server command

Check if you run it

No confirmed exploitation is on record for CVE-2026-55797. EPSS is 1.55%. Act only if a listed version of Argo CD repo-server command is installed.

Gaps on this record

  • The stored product name is a package slug. The name on this page is taken from the title (Argo CD repo-server command).
  • No vendor fix or required action is stored. Compare the linked advisory before you change production.
Severity
High8.8
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
1.55%
Remediation
Advisory link
Affected products
Go github.com/argoproj/argo-cd/v2 · Go github.com/argoproj/argo-cd/v3

### 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

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • 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

How to fix CVE-2026-55797

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

No confirmed exploitation is on record for CVE-2026-55797. EPSS is 1.55%. Act only if a listed version of Argo CD repo-server command is installed.

Which versions are affected?

Compare what you have installed with 2.11.0 → 2.14.21, 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. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

CWE-78: OS Command Injection. EPSS 1.55%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

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

Sources

References

Freshness

Last verified in this catalog Oct 18, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.