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CVE-2026-42088

34
FAUCET Score

OpenC3 COSMOS provides the functionality needed to send commands to and receive data from one or more embedded systems. Prior to version 7.0.0-rc3, the Script Runner widget allows users to execute Python and Ruby scripts directly from the openc3-COSMOS-script-runner-api container. Because all the docker containers share a network, users can execute specially crafted scripts to bypass the API permissions check and perform administrative actions, including reading and modifying data inside the Redis database, which can be used to read secrets and change COSMOS settings, as well as read and write to the buckets service, which holds configuration, log, and plugin files. These actions are normally only available from the Admin Console or with administrative privileges. Any user with permission to create and run scripts can connect to any service in the docker network. This issue has been patched in version 7.0.0-rc3.

First published: May 4, 2026Last modified: May 4, 2026

Impacted Technologies

VendorProductVersion(s)CPE
< 7.0.0CPE matchmatch criteria
cpe:2.3:a:openc3:cosmos:*:*:*:*:open_source:*:*:*
7.0.0CPE matchmatch criteria
cpe:2.3:a:openc3:cosmos:7.0.0:rc1:*:*:open_source:*:*:*
7.0.0CPE matchmatch criteria
cpe:2.3:a:openc3:cosmos:7.0.0:rc2:*:*:open_source:*:*:*

CVSS Data

CVSS version used by this source: 3.1

9.6CRITICAL

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
CHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
NONE
Exploitability Score
3.1
Impact Score
5.8
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.34%
Probability of exploitation in next 30 days
EPSS Percentile
26.7%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
This CVE's current EPSS score of 0.0034 is in the 14th percentile among its peer group of 17,844 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.3 Bluesky, 0.1 Mastodon, and 0.2 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Vendor Patches (1)

github_advisoryvendor investigatingvia nvd_reference
View patch

References

github.com / OpenC3/cosmos/releases/tag/v7.0.0
Release Notes
github.com / OpenC3/cosmos/releases/tag/v7.0.0-rc3
Release Notes
github.com / OpenC3/cosmos/security/advisories/GHSA-2wvh-87g2-89hr
ExploitVendor Advisory