CVE-2026-68517 Glances: REST API CORS Credentials Guard Uses Exact-Match Instead of Membership Test — Bypassed by Any Multi-Origin Allowlist Containing the Wildcard
Attackers can bypass CORS restrictions to read authenticated data from Glances REST API if a wildcard is in the allowlist.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- Available
What is CVE-2026-68517?
CVE-2026-68517 is a medium-severity vulnerability in nicolargo glances, published on 17 Aug 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Official description
Glances is an open-source system cross-platform monitoring tool. Prior to 4.5.6, the cors_origins guard in glances/outputs/glances_restful_api.py uses exact list equality instead of wildcard membership, allowing a multi-origin list containing the wildcard to retain cors_credentials and expose authenticated REST API data to an untrusted website visited by a previously authenticated user. This issue is fixed in 4.5.6.
Weakness: CWE-942
Which versions are affected by CVE-2026-68517?
3 open source packages ship an affected version, including glances.
| Package | Affected | Fixed in |
|---|---|---|
glances PyPI | All versions | 4.5.6 |
glances PyPI | All versions | 4.5.6 |
glances PyPI | All versions | 4.5.6 |
How do I fix CVE-2026-68517?
Upgrade glances to 4.5.6 or later.
Is CVE-2026-68517 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-68517 exists.
Sources
Also known as DEBIAN-CVE-2026-68517, GHSA-fp27-88fp-2phg, PYSEC-2026-3667, UBUNTU-CVE-2026-68517.