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CVE-2026-63178

6.5 · MEDIUM

Onyx is an open-source AI platform.

Published Aug 17, 2026CWE-639EPSS 0.52%

Overview

CVE-2026-63178 is a medium-severity vulnerability. It was published on August 17, 2026 and has a CVSS 3.1 base score of 6.5 (MEDIUM).

This vulnerability has a CVSS 3.1 base score of 6.5, rated MEDIUM. It can be exploited remotely over the network. Some level of privileges is required for exploitation.

Technical description

Onyx is an open-source AI platform. Prior to 4.3.0, Onyx Enterprise Edition's PATCH /manage/admin/user-group/{user_group_id} and POST /manage/admin/user-group/{user_group_id}/add-users endpoints in ee/onyx/server/user_group/api.py call update_user_group and add_users_to_user_group in ee/onyx/db/user_group.py without enforcing _validate_curator_can_modify_group, allowing a curator to add accounts to arbitrary groups and obtain document access through get_acl_for_user and the OpenSearch access_control_list filter. This issue is fixed in version 4.3.0.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

GitHubgithub.com/onyx-dot-app/onyx/commit/46e19cc2750fed659488cb12a1f171016ba5a099GitHubgithub.com/onyx-dot-app/onyx/commit/b9e1c6894be3c237283f4b5fd4eb0af935b40664GitHubgithub.com/onyx-dot-app/onyx/pull/12525GitHubgithub.com/onyx-dot-app/onyx/pull/12549GitHubgithub.com/onyx-dot-app/onyx/releases/tag/v4.3.0GitHubgithub.com/onyx-dot-app/onyx/security/advisories/GHSA-7f48-vgpj-h95mGitHubgithub.com/onyx-dot-app/onyx/security/advisories/GHSA-7f48-vgpj-h95m

How CyberStrike helps

Frequently asked questions

What is CVE-2026-63178?

CVE-2026-63178 is a medium-severity vulnerability. It was published on August 17, 2026 and has a CVSS 3.1 base score of 6.5 (MEDIUM).

How severe is CVE-2026-63178?

This vulnerability has a CVSS 3.1 base score of 6.5, rated MEDIUM. It can be exploited remotely over the network. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2026-63178?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2026-63178?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-63178 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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