# A credential leak in OpenC3 COSMOS before v6.0.2 allows attackers to access service credentials as environment variables stored in all containers.

Advisory record · `PYSEC-2025-255`

- **Identifiers:** `PYSEC-2025-255` · `CVE-2025-28381`
- **State:** Confirmed
- **Severity:** CVSS 7.5 High
- **Critical:** No
- **Weakness (CWE):** [CWE-526](https://cwe.mitre.org/data/definitions/526.html)
- **Tags:** [CWE-526](https://agentprime.io/advisories/tag/cwe-526.md)
- **Published:** 13 Jun 2025
- **Updated:** 13 Jul 2026
- **Reviewed by a person:** No

Published by OSV at 13 Jun 2025, 14:15 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

## Affected packages

- `openc3` (PyPI): affected `<=6.0.0`; no fixed version yet

## Not analysed yet

We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.

## Severity and exploitation

- 7.5 High, CVSS 3.1: `CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N`, from OSV

- **CISA KEV:** Not listed.
- **EPSS:** 0.0052, the 44th percentile, on 6 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

## Timeline

- 31 Oct 2026, 15:04 UTC: First seen by agentprime
- 31 Oct 2026, 15:04 UTC: [Confirmed by OSV](https://osv.dev/vulnerability/PYSEC-2025-255)

## Sources

- [OSV: PYSEC-2025-255](https://osv.dev/vulnerability/PYSEC-2025-255)
- <https://github.com/OpenC3/cosmos/pull/1816/commits/cce64c213fd2e6a70e2ccbf3622949fe8f9dcaef>
- <https://github.com/OpenC3/cosmos/releases/tag/v6.0.2>
- <https://openc3.com/>
- <https://github.com/OpenC3/cosmos/pull/1816>

Facts on this page come from the GitHub Advisory Database (CC-BY 4.0), OSV and the other sources listed, as published. We don’t reproduce full advisory descriptions, which can contain exploit code.

## Check whether this affects you

A Match means an installed version is in the affected range above. Most don’t affect the app; agentprime hasn’t analysed this one yet.

- With the agentprime MCP server (<https://api.agentprime.io/mcp>), ask your agent to check the project: `check_lockfile` sends a lockfile, `check_packages` a list of installed packages, and both return the Matches and the upgrades that clear them. `get_advisory` returns this record. Setup: <https://agentprime.io/mcp.md>
- In a browser: <https://agentprime.io/check/> reads your lockfile in the browser, never uploading it.
- Whether it touches your code, with file and line: the Claude Code plugin, <https://agentprime.io/plugin.md>
- As JSON: <https://api.agentprime.io/v1/advisories/PYSEC-2025-255>, or `POST https://api.agentprime.io/v1/match` with your packages (<https://agentprime.io/api.md>)

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The web page: <https://agentprime.io/advisories/PYSEC-2025-255/>. Everything for agents: <https://agentprime.io/llms.txt>.