What is CVE-2026-42087?

CVE-2026-42087 is a critical-severity vulnerability in Openc3 Cosmos, classified under SQL Injection. CVSS score: 9.6/10. Published 2026-05-04.

How severe is CVE-2026-42087?

Critical severity. CVSS v3 base score is 9.6 out of 10.

SQL Injection in Openc3 Cosmos

CVE-2026-42087

OpenC3 COSMOS provides the functionality needed to send commands to and receive data from one or more embedded systems. From version 6.7.0 to before version 7.0.0-rc3, a SQL injection vulnerability exists in the Time-Series Database (TSDB)…

Vulnerability class: SQL Injection

EPSS: 0.000 (7.7th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 9.6 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N.

Affected products

Openc3 Cosmos — versions >= 6.7.0, < 7.0.0-rc3, 7.0.0

Weakness classification (CWE)

CWE-89 — SQL Injection

References

https://github.com/OpenC3/cosmos/security/advisories/GHSA-v529-vhwc-wfc5 (x_refsource_CONFIRM, Exploit, Vendor Advisory)
https://github.com/OpenC3/cosmos/commit/9ba60c09c8836a37a2e4ea67ab35fe403e041415 (Patch, x_refsource_MISC)
https://github.com/OpenC3/cosmos/releases/tag/v7.0.0-rc3 (x_refsource_MISC, Release Notes)

Frequently asked questions

What is CVE-2026-42087?: CVE-2026-42087 is a critical-severity vulnerability in Openc3 Cosmos, classified under SQL Injection. CVSS score: 9.6/10. Published 2026-05-04.
How severe is CVE-2026-42087?: Critical severity. CVSS v3 base score is 9.6 out of 10.