---
id: "CVE-2026-120426"
kind: "vulnerability"
aliases: ["CVE-2026-120426"]
title: "OpenCSG CSGHub: unauthenticated request reads private repository files"
severity: "high"
cvss: 8.7
epss: null
exploited: false
status: "open"
category: "other"
products: [{"name": "csghub", "fixed": [], "affected": "<= v2.6.0-ce", "ecosystem": "vendor"}]
ecosystems: []
tags: ["ai-model-hosting", "csghub", "other", "self-hosted"]
not_affected_if: ["dataset-repositories-only", "no-external-exposure", "version-later-than-2.6.0-ce"]
published_at: "2026-11-02T15:17:23+00:00"
first_seen_at: "2026-11-02T15:24:01+00:00"
updated_at: "2026-11-02T15:29:36+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-120426", "first_seen_at": "2026-11-02T15:24:01+00:00"}, {"source": "analyst", "url": null, "first_seen_at": "2026-11-02T15:29:36+00:00"}]
---

# OpenCSG CSGHub: unauthenticated request reads private repository files

OpenCSG CSGHub through v2.6.0-ce has an unauthenticated file resolve route (/:repo_type/:namespace/:name/resolve/:branch/*path). With no user_token cookie the portal fetches files using its server API key, and a percent-encoded '?current_user=<owner>&' in the file path overrides the acting user, so private model, code and space files can be read. Dataset repos are not affected per the reporter.

_Summary, check and fix written by a model from the sources; labelled as such._

## Affected

- vendor:csghub affected <= v2.6.0-ce fixed ?

## How to check

- Check your CSGHub portal version: v2.6.0-ce or earlier is affected per VulnCheck.
- Check whether the portal is reachable from untrusted networks and whether you host private model, code or space repositories.
- Fixed version: not found in the sources read; check the OpenCSGs/csghub releases and issue #1586.

## Timeline

- 2026-11-02T15:24:01+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-120426
- 2026-11-02T15:29:36+00:00 analyst — Read VulnCheck advisory and reporter write-up (hackmd). No fixed release found: the linked v2.6.0-ce release page is the affected version and returned no content; issue #1586 unreadable. Nothing marked verified (no vendor text read). Reporter's analysis is source-derived and not executed against a live system.

## Documents

- [advisory] Third-party advisory: www.vulncheck.com https://www.vulncheck.com/advisories/opencsg-csghub-through-2.6.0-ce-unauthenticated-private-repository-file-read-via-resolve-route
- [describes] CSGHub portal: unauthenticated private repository file disclosure via current_user injection (reporter write-up) https://hackmd.io/@hieund/csghub-private-repo-file-read-idor
- [fix] Release notes: github.com https://github.com/OpenCSGs/csghub/releases/tag/v2.6.0-ce

## From the sources

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.

---

_Free to read at a human pace. An API with keys and an MCP server are in preparation; early access: hello@infrastack.ai_