CVE-2026-42087

Name: CVE-2026-42087
Creator: NVD / NIST
Published: 2026-05-04T18:16:30.83+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 9.6/10EPSS 0.32%

Last modified Jun 17, 2026

CVE-2026-42087 is a critical-severity vulnerability rated 9.6/10 on the CVSS scale. 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) component of COSMOS. EPSS estimates a 0.32% chance of exploitation in the next 30 days.

Description

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) component of COSMOS. The tsdb_lookup function in the cvt_model.rb file directly places user-supplied input into a SQL query without sanitizing the input. As a result, a user can break out of the initial SQL statement and execute arbitrary SQL commands, including deleting data. This issue has been patched in version 7.0.0-rc3.

Metrics

CVSS 3.1

9.6/10

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N

EPSS Probability

0.32%

24.0th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-89

Affected Software

Vendor	Product	Versions	Update
Openc3	Cosmos	>= 6.7.0, < 7.0.0	—
Openc3	Cosmos	7.0.0	Rc1

References

https://github.com/OpenC3/cosmos/commit/9ba60c09c8836a37a2e4ea67ab35fe403e041415Patch
https://github.com/OpenC3/cosmos/releases/tag/v7.0.0-rc3Release Notes
https://github.com/OpenC3/cosmos/security/advisories/GHSA-v529-vhwc-wfc5Exploit, Vendor Advisory
https://github.com/OpenC3/cosmos/security/advisories/GHSA-v529-vhwc-wfc5Exploit, Vendor Advisory

Timeline

Published: May 4, 2026
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2026-42087?

How severe is CVE-2026-42087?

CVE-2026-42087 has a CVSS score of 9.6/10 (CRITICAL severity). The EPSS model estimates a 0.32% probability of exploitation in the next 30 days.

How do I fix CVE-2026-42087?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2026-42087?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST