CVE-2026-42087 json
OpenC3 COSMOS: SQL Injection in QuestDB Time-Series Data Base
published 2026-04-23 6 mo ago modified 2026-10-26 13 d ago also EUVD-2026-27063 , GHSA-v529-vhwc-wfc5 , PYSEC-2026-2244
- cvss
- 9.6
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.3%
- EPSS 0.3% chance of exploitation in 30 days, percentile 25%
- public exploits
- 0
- none known
Summary
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.
Patch / fix
- rubygems openc3 7.0.0-rc3
- pypi openc3 7.0.0
- openc3 cosmos 7.0.0-rc3
CISA SSVC
- Exploitation
- Proof of concept is public
- Automatable
- no
- Technical impact
- total
- Assessed
- 6 mo ago
Exploit prediction
0.32% chance of exploitation in the next 30 days, higher than 25% of all scored CVEs (FIRST EPSS, 2026-11-08).
Exploits and checks
- github.com https://github.com/OpenC3/cosmos/security/advisories/GHSA-v529-vhwc-wfc5 referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 9.6 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N |
| GitHub | 3.1 | 9.6 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N |
| OSV | 3.1 | 9.6 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| rubygems | openc3 | >=6.7.0, <7.0.0-rc3 |
7.0.0-rc3 |
| pypi | openc3 | >=6.7.0, <7.0.0 |
7.0.0 |
Affected products
- OpenC3 cosmos
Classification
- Weakness
-
- CWE-89 Improper Neutralization of Special Elements used in an SQL Command
References
-
github.com
/OpenC3/cosmos/commit/9ba60c09c8836a37a2e4ea67ab35fe403e041415
web, patch
-
github.com
/OpenC3/cosmos/security/advisories/GHSA-v529-vhwc-wfc5
exploit, web, vendor-advisory, evidence
-
github.com
/OpenC3/cosmos/releases/tag/v7.0.0-rc3
web, release-notes, advisory
-
nvd.nist.gov
/vuln/detail/CVE-2026-42087
advisory
-
github.com
/OpenC3/cosmos
package
-
github.com
/rubysec/ruby-advisory-db/blob/master/gems/openc3/CVE-2026-42087.yml
web
Sources
- CVE List CVE-2026-42087
- GitHub Advisory GHSA-v529-vhwc-wfc5
- NVD CVE-2026-42087
- OSV PYSEC-2026-2244
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.
CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.