# CVE-2026-6815: Casbin Casdoor path traversal in Local File System storage provider

Source: https://junglewise.ai/threats/cve-2026-6815-casbin-casdoor-path-traversal-in-local-file-system-storage  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-05-11. Updated: 2026-07-08  
License: CC BY 4.0 with a link back

CVE-2026-6815 · Severity: medium · CVSS 5.9 · Published 2026-05-11

Casdoor is an identity management platform used to handle user logins and authentication for various applications. A security flaw in its local storage system allows an authorized user with file upload permissions to save files outside of the intended folder. This could allow an attacker to overwrite critical system files, potentially leading to a complete service outage or unauthorized access to the underlying server.

Technologies: [Casbin Casdoor](https://junglewise.ai/threats/technologies/casdoor), [github.com/casdoor/casdoor (Go)](https://junglewise.ai/threats/technologies/github-com-casdoor-casdoor). Vendors: [Casbin](https://junglewise.ai/threats/vendors/casbin), [Go](https://junglewise.ai/threats/vendors/go).

## Quick answers

**Is CVE-2026-6815 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-6815 being exploited in the wild.

**How severe is CVE-2026-6815?** Medium severity, with a CVSS score of 5.9, published 11 May 2026.

**Which products and versions are affected?** Casbin Casdoor up to (including) 2.328.0; github.com/casdoor/casdoor (Go) <= 1.1000.0, SEMVER:introduced=0, SEMVER:introduced=0,last_affected=1.1000.0.

**Is there a fix for CVE-2026-6815?** No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

**How is CVE-2026-6815 attacked?** It is attacked with local access, in a network appliance.

**Am I affected by CVE-2026-6815?** Check whether you run Casbin Casdoor or github.com/casdoor/casdoor (Go) at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Technical details

A path traversal vulnerability (CWE-22) exists in Casdoor's Local File System storage provider within the /api/upload-resource endpoint. The application fails to sanitize the 'pathPrefix' and 'fullFilePath' parameters, allowing an authenticated attacker with file upload privileges to use directory traversal sequences (e.g., ../../) to write or overwrite files outside the designated $CASDOOR/files/ directory. This can result in the corruption of the backend database (casdoor.db), persistence via cron job creation, or full host compromise depending on the service account's permissions. While a pull request (PR #5458) has been submitted to address the issue, no official patched version was confirmed at the time of the advisory.

## Affected products

- Casdoor Casdoor <= 1.1000.0

## Identifiers

- CVE-2026-6815
- GHSA-rmxx-v9rj-vpvg
- GO-2026-5945

## Timeline

- 2026-02-23: other: Vendor notified
- 2026-05-11: disclosed: Initial public disclosure
- 2026-05-11: advisory: GitHub Advisory published

## References

- [https://kb.cert.org/vuls/id/937808](https://kb.cert.org/vuls/id/937808)
- [https://www.kb.cert.org/vuls/id/937808](https://www.kb.cert.org/vuls/id/937808)

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