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CVE-2026-42087

Openc3 Cosmos SQL injection

9.6 CRITICALPublic exploitEPSS 0.45%
  1. Published4 May 2026

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.

CVSS 3.1 breakdown

Attack vectorNetwork
Attack complexityLow
Privileges requiredLow
User interactionNone
ScopeChanged
ConfidentialityHigh
IntegrityHigh
AvailabilityNone
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N

Affected products

Openc3 Cosmos7.0.0 · ≥ 6.7.0 < 7.0.0

Remediation

Fixed in
Openc3 Cosmos≥ 7.0.0

References

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Frequently asked

Is CVE-2026-42087 being actively exploited?

CVE-2026-42087 is not in the CISA KEV catalog. A public exploit reference exists, so treat it as exploitable. Its EPSS exploit probability is 0.45%.

How severe is CVE-2026-42087?

CVE-2026-42087 has a CVSS 3.1 base score of 9.6, rated critical. EPSS estimates a 0.45% probability of exploitation.

Which products are affected by CVE-2026-42087?

Affected products include Openc3 Cosmos.

How do I fix CVE-2026-42087?

Upgrade affected software to a fixed version, for example Openc3 Cosmos 7.0.0 or later, then confirm no affected versions remain in your inventory.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2026-42087 against the real software inventory on every managed device, every day. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

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Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.