CVE-2026-55797Network attack vectorHinoki check available

Authenticated command execution via unescaped SSH proxy

Published Oct 9, 2026 · Updated Oct 9, 2026

Command injection in Argo CD repo-server allows remote authenticated users to execute commands via a crafted SSH repository proxy URL. The SSHCreds.Environ method embeds proxy host and port values into a shell-interpreted SSH ProxyCommand without neutralizing shell metacharacters. Exploitation requires permission to create or update a repository or credential template and an SSH repository connection test, clone, or fetch; commands run in the repo-server context and can read its Git, Helm, and OCI credentials.

CVSS severity8.8
High
EPSS probability1.55%
Next 30 days · Oct 19, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Get started

Summary

What happened

Command injection in Argo CD repo-server allows remote authenticated users to execute commands via a crafted SSH repository proxy URL. The SSHCreds.Environ method embeds proxy host and port values into a shell-interpreted SSH ProxyCommand without neutralizing shell metacharacters. Exploitation requires permission to create or update a repository or credential template and an SSH repository connection test, clone, or fetch; commands run in the repo-server context and can read its Git, Helm, and OCI credentials.

The record

CVE
CVE-2026-55797
Published
Oct 9, 2026
Updated
Oct 9, 2026
Vendor
Argo Project
Product
Argo CD
Classifications
CWE-78, T1059.004
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Oct 9, 2026CVE publishedPublication date reported by the CVE source.
  2. Oct 9, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=>= 2.11.0, <= 2.14.21
  2. Affected versionversion=>= 3.0.0, < 3.3.15
  3. Affected versionversion=>= 3.4.0, < 3.4.10
  4. Affected versionversion=>= 3.5.0, < 3.5.4
  5. Affected versionversion== 3.6.0-rc1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Argo Project · Argo CDversion=>= 2.11.0, <= 2.14.21; version=>= 3.0.0, < 3.3.15; version=>= 3.4.0, < 3.4.10; version=>= 3.5.0, < 3.5.4; version== 3.6.0-rc1

Published CVSS scores

8.8GitHub CNACVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Activity data is delayed. The latest report is Sep 28, 2026.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 22, 2026Sep 28, 2026
Latest reporting daySep 28, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-78Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
T1059.004Unix Shell

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

See the directory against your own environment.

Your stack

Check the software in your environment

Get started to see how Hinoki identifies affected software and validates exploitability in your environment.

Get started