CVE-2026-120426

OpenCSG CSGHub through v2.6.0-ce contains an authorization bypass vulnerability in the unauthenticated file resolve route that allows remote attackers to read private repository files. Attackers can inject a percent-encoded current_user parameter into the file path, which the portal forwards with its server API key, to read files in private model, code or space repositories.

CVSS v3 7.5 HIGH

7.5^/10

CVSS v3 : HIGH

Vector :

Exploitability : 3.9 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact NONE

Availability Impact NONE

Scope UNCHANGED

References

Link	Resource
https://github.com/OpenCSGs/csghub-server/blob/v2.6.0-ce/api/middleware/authenticator.go#L210-L226
https://github.com/OpenCSGs/csghub/blob/v2.6.0-ce/internal/handlers/frontend/resolve.go#L138-L151
https://github.com/OpenCSGs/csghub/blob/v2.6.0-ce/internal/routes/router.go#L302-L303
https://github.com/OpenCSGs/csghub/blob/v2.6.0-ce/pkg/server/backend/csghubserver/download.go#L10-L41
https://github.com/OpenCSGs/csghub/issues/1586
https://github.com/OpenCSGs/csghub/releases/tag/v2.6.0-ce
https://hackmd.io/@hieund/csghub-private-repo-file-read-idor
https://www.vulncheck.com/advisories/opencsg-csghub-through-2.6.0-ce-unauthenticated-private-repository-file-read-via-resolve-route

Configurations

No configuration.

History

02 Nov 2026, 15:17

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-11-02 15:17

Updated : 2026-11-02 19:35

NVD link : CVE-2026-120426

Mitre link : CVE-2026-120426

CVE.ORG link : CVE-2026-120426

JSON object : View

Products Affected

No product.

CWE

CWE-639

Authorization Bypass Through User-Controlled Key

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