# CVE-2026-68517: Glances REST API CORS credentials bypass via wildcard in multi-origin list

Source: https://junglewise.ai/threats/cve-2026-68517-glances-rest-api-cors-credentials-bypass-via-wildcard-in-multi  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-08-17. Updated: 2026-09-25  
License: CC BY 4.0 with a link back

CVE-2026-68517 · Severity: medium · CVSS 6.5 · Published 2026-08-17

Glances is a real-time system monitoring tool that exposes a REST API for remote access to performance data and process lists. A flaw in its cross-origin (CORS) security check allows attackers to bypass authentication credential protections when a configuration includes both a wildcard and specific trusted origins. An attacker can trick a victim's browser into making cross-origin requests to the Glances API and steal sensitive monitoring data, including process command lines (which may contain secrets), usernames, and PIDs.

Technologies: [glances (PyPI)](https://junglewise.ai/threats/technologies/glances). Vendors: [PyPI](https://junglewise.ai/threats/vendors/pypi).

## Quick answers

**Is CVE-2026-68517 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-68517 being exploited in the wild.

**How severe is CVE-2026-68517?** Medium severity, with a CVSS score of 6.5, published 17 August 2026.

**Which products and versions are affected?** glances (PyPI) < 4.5.6, ECOSYSTEM:introduced=0,fixed=4.5.6.

**Is there a fix for CVE-2026-68517?** Yes. glances (PyPI): upgrade to 4.5.6 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2026-68517 attacked?** It is attacked over the network, in a web application.

**Am I affected by CVE-2026-68517?** Check whether you run glances (PyPI) 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.

## How to fix

- glances (PyPI): upgrade to 4.5.6 or later

  ```sh
  pip install "glances>=4.5.6"
  ```


## Technical details

The vulnerability is a logic error in the CORS credentials guard at glances/outputs/glances_restful_api.py:298. The code checks `if cors_origins == ["*"] and cors_credentials:` using exact list equality, but Starlette's underlying CORSMiddleware determines wildcard behavior via membership test (`"*" in allow_origins`). When an operator configures cors_origins as a multi-entry list containing "*" (e.g., ["*", "https://trusted.example.com"]), the Glances guard fails to trigger (because the list is not exactly ["*"]), but Starlette still treats it as "allow all origins" and reflects the request's Origin header together with Access-Control-Allow-Credentials: true. An unauthenticated attacker can then craft a malicious webpage that, when visited by a victim who has previously logged into Glances via their browser, automatically sends cross-origin API requests that include the victim's cached HTTP Basic Auth credentials. This exposes the full authenticated monitoring dataset including process lists with command-line arguments. The fix is to change the check from exact equality to membership test: `if "*" in cors_origins and cors_credentials:`, matching the corrected pattern already deployed in the sibling XML-RPC server. Patch version 4.5.6 is available.

## Affected products

- nicolargo Glances < 4.5.6

## Identifiers

- CVE-2026-68517
- GHSA-fp27-88fp-2phg
- PYSEC-2026-3667

## Timeline

- 2026-08-17: disclosed: Published in GitHub Advisory Database
- 2026-08-01: patched: Fix released in version 4.5.6

## References

- [https://api.github.com/users/geo-chen](https://api.github.com/users/geo-chen)
- [https://github.com/geo-chen](https://github.com/geo-chen)
- [https://api.github.com/users/geo-chen/gists%7B/gist_id%7D](https://api.github.com/users/geo-chen/gists%7B/gist_id%7D)
- [https://api.github.com/users/geo-chen/repos](https://api.github.com/users/geo-chen/repos)
- [https://avatars.githubusercontent.com/u/2404584?v=4](https://avatars.githubusercontent.com/u/2404584?v=4)
- [https://api.github.com/users/geo-chen/events%7B/privacy%7D](https://api.github.com/users/geo-chen/events%7B/privacy%7D)

## Related threats

- [Glances as_dict_secure credential leak in API config endpoint](https://junglewise.ai/threats/cve-2026-68520-glances-as-dict-secure-credential-leak-in-api-config-endpoint)
- [Glances incomplete fix in alert action command execution](https://junglewise.ai/threats/cve-2026-68519-glances-incomplete-fix-in-alert-action-command-execution)
- [Glances incomplete command injection sanitizer fix in nested stat values](https://junglewise.ai/threats/cve-2026-62982-glances-incomplete-command-injection-sanitizer-fix-in-nested-stat)
- [Glances command injection via cross-field shell-operator reconstruction](https://junglewise.ai/threats/cve-2026-68518-glances-command-injection-via-cross-field-shell-operator)
- [nicolargo Glances command injection in secure_popen via AMP configuration](https://junglewise.ai/threats/cve-2026-53925-nicolargo-glances-command-injection-in-secure-popen-via-amp)