CVE-2026-42087 | OpenC3 COSMOS: SQL Injection in QuestDB Time-Series Data Base

Exp

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.

Published: 2026-05-04 Last update: 2026-06-17 Assigner: [email protected] Source: [email protected]
NVD Status：Analyzed，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2026-42087 is rated High Exploit Risk (62/100): CVSS Critical severity, with low exploitation likelihood (EPSS 0.32%). 1 public exploit reference(s) are indexed (Exploit-DB). Public exploits are available—assess exposure, apply mitigations, and prioritize patching.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Public exploit references (Exploit-DB) for CVE-2026-42087

EDB-ID Source Kind Published Link
— nvd_ref exploit_tag Exploit-DB ↗

Exploit prediction scoring system (EPSS) score for CVE-2026-42087

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-06-15 0.02% 0.32% +0.30%
2 2026-05-05 — 0.02% —

Full EPSS history (2 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2026-42087

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
9.6 3.1 CRITICAL
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:L)
A normal user session is enough; they don’t have to be admin.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:C)
Breaking this can reach past the original component and bite other resources—bigger blast radius.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:H)
They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:N)
Service keeps running; no real outage angle.
 3.1 5.8 [email protected]

Weakness enumeration for CVE-2026-42087

GitHub Security Advisory for CVE-2026-42087

GHSA-v529-vhwc-wfc5 · Severity: critical · Ecosystem: rubygems — OpenC3 COSMOS has SQL Injection in QuestDB Time-Series Database

Affected software / configurations for CVE-2026-42087

Vendor Product Version Raw CPE
openc3 cosmos >= 6.7.0, < 7.0.0 cpe:2.3:a:openc3:cosmos:*:*:*:*:open_source:*:*:*
openc3 cosmos 7.0.0 cpe:2.3:a:openc3:cosmos:7.0.0:rc1:*:*:open_source:*:*:*
openc3 cosmos 7.0.0 cpe:2.3:a:openc3:cosmos:7.0.0:rc2:*:*:open_source:*:*:*

References for CVE-2026-42087

cvelogic Threat Intelligence