CVE-2026-32610CWE-942

Glances's Default CORS Configuration Allows Cross-Origin Credential Theft

High · published March 18, 2026

CVSS v3.1
8.1
EPSS
1%
Percentile
42.4
In the wild
Unconfirmed
What it is

Glances is an open-source system cross-platform monitoring tool. Prior to version 4.5.2, the Glances REST API web server ships with a default CORS configuration that sets `allow_origins=["*"]` combined with `allow_credentials=True`. When both of these options are enabled together, Starlette's `CORSMiddleware` reflects the requesting `Origin` header value in the `Access-Control-Allow-Origin` response header instead of returning the literal `*` wildcard. This effectively grants any website the ability to make credentialed cross-origin API requests to the Glances server, enabling cross-site data theft of system monitoring information, configuration secrets, and command line arguments from any user who has an active browser session with a Glances instance. Version 4.5.2 fixes the issue.

The record
Technical detail
CVSS v3.1
8.1 · HIGH
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N
CVSS v4.0
Not supplied
EPSS
0.00507 · 42.4th percentile
Weakness
CWE-942 · Permissive Cross-domain Security Policy with Untrusted Domains
Published
2026-03-18T16:31Z
EPSS history
Timeline
  • 18 MAR 16:31Z
    Glances's Default CORS Configuration Allows Cross-Origin Credential Theft
    cvelistv5