Unauthenticated command injection via cron exec
Published Aug 19, 2026 · Updated Aug 20, 2026
Command injection in the Management API in chenhg5 cc-connect 1.4.0 and 1.4.1 allows remote attackers to execute OS commands via cron exec input. The POST /api/v1/cron handler accepts a user-supplied exec field, stores it in a CronJob, and executeCronShell passes job.Exec to shellExecCommand, which invokes sh -c or PowerShell without validation or an allowlist. Unauthenticated reachability requires the Management API to be enabled and left with an empty management.token, because authenticate returns true in that state; with a non-empty token, bearer or query-token checks still gate the endpoint.
Summary
What happened
Command injection in the Management API in chenhg5 cc-connect 1.4.0 and 1.4.1 allows remote attackers to execute OS commands via cron exec input. The POST /api/v1/cron handler accepts a user-supplied exec field, stores it in a CronJob, and executeCronShell passes job.Exec to shellExecCommand, which invokes sh -c or PowerShell without validation or an allowlist. Unauthenticated reachability requires the Management API to be enabled and left with an empty management.token, because authenticate returns true in that state; with a non-empty token, bearer or query-token checks still gate the endpoint.
The record
- CVE
- CVE-2026-76761
- Published
- Aug 19, 2026
- Updated
- Aug 20, 2026
- Vendor
- chenhg5
- Product
- cc-connect
- Classifications
- CWE-77, CWE-78, T1059.004, T1190
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Aug 19, 2026CVE publishedPublication date reported by the CVE source.
- Aug 20, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=1.4.0
- Affected versionversion=1.4.1
What conditions does exploitation require?
What is affected?
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.
Weakness, pattern, technique
Public exploit references
- GitHub issue proof of concept for CVE-2026-76761proof of concept · demonstrated
Labels summarize the accepted research assessment. They do not indicate a test against your environment.
Technologies
Your stack
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Your stack
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