Security Vulnerability in OpenC3 COSMOS by OpenC3
CVE-2026-77601

8.8HIGH

Key Information:

Vendor

Openc3

Status
Cosmos
Vendor
CVE Published:
23 September 2026

What is CVE-2026-77601?

OpenC3 COSMOS versions from 5.12.0 to 7.3.0 are susceptible to a command injection vulnerability. Authenticated users can manipulate the pypi_url setting via a POST request to /openc3-api/api, leading to the execution of arbitrary operating-system commands during plugin installations. This occurs due to improper handling of shell metacharacters, which can be exploited by both open-source and Enterprise deployments, potentially compromising service user permissions and exposing sensitive data.

Affected Version(s)

cosmos >= 5.12.0, < 7.3.0

References

https://github.com/OpenC3/cosmos/security/advisories/GHSA...
x_refsource_CONFIRM
https://github.com/OpenC3/cosmos/pull/3489
x_refsource_MISC
https://github.com/OpenC3/cosmos/commit/be70d1d836c83c3b0...
x_refsource_MISC

CVSS V3.1

Score:
8.8
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
Low
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.