# OpenC3 COSMOS before v6.0.2 was discovered to contain hardcoded credentials for the Service Account. Advisory record · `PYSEC-2025-258` - **Identifiers:** `PYSEC-2025-258` · `CVE-2025-28388` - **State:** Confirmed - **Severity:** CVSS 9.8 Critical - **Critical:** Yes: CVSS 9+ - **Weakness (CWE):** [CWE-798](https://cwe.mitre.org/data/definitions/798.html) - **Tags:** [Hard-coded credentials](https://agentprime.io/advisories/tag/hard-coded-credentials.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. ## Critical Critical, because: - CVSS score 9.8: 9.0 or more. How we decide what’s critical: ## Affected packages - `openc3` (PyPI): affected `<=6.0.0`; no fixed version yet ## Machine-written summary Summary written by Claude Haiku from the source advisory. Not reviewed by a person. > OpenC3 COSMOS, as published through the openc3 package, is affected in versions 6.0.0 and earlier. The source gives few details, but it states the software contains hardcoded credentials for its Service Account, which an attacker could use to gain access. No fixed version is listed, so no fix is available from the source. Written 6 Nov 2026. ## 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 - 9.8 Critical, CVSS 3.1: `CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H`, from OSV - **CISA KEV:** Not listed. - **EPSS:** 0.0063, the 50th percentile, on 13 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-2025-258) ## Sources - [OSV: PYSEC-2025-258](https://osv.dev/vulnerability/PYSEC-2025-258) - - - - 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 (), 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: - In a browser: reads your lockfile in the browser, never uploading it. - Whether it touches your code, with file and line: the Claude Code plugin, - As JSON: , or `POST https://api.agentprime.io/v1/match` with your packages () --- The web page: . Everything for agents: .