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TI-2026-34267 Aliases CVE-2026-46608GHSA-87qc-fj39-wccr

Glances: XML-RPC Multi-Origin CORS Configuration Silently Falls Back to Wildcard (Incomplete Fix for CVE-2026-33533)

Priority LOW 33CWE-183Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
Required
Attack complexity
Low
Impact type
—
Confidentiality · integrity · availability
High · None · None
Fix status
Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA and GitHub.

Summary

Glances is an open-source system cross-platform monitoring tool. Prior to 4.5.5, the Glances XML-RPC server (glances -s) introduced a configurable CORS origin list in version 4.5.3 as a mitigation for CVE-2026-33533. However, the implementation silently falls back to Access-Control-Allow-Origin: * whenever cors_origins contains more than one entry. An operator who configures an explicit two-entry allowlist (e.g. two internal dashboard origins) intending to restrict browser access instead receives the unrestricted wildcard. A malicious web page served from any origin can issue a CORS simple request to /RPC2 and read the full system monitoring dataset without the victim's knowledge. This vulnerability is fixed in 4.5.5.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00401 34th percentileScored 2026-11-07
Fix Fixed glances (nicolargo): 4.5.5glances (PyPI): 4.5.5

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
nicolargoglancesbefore 4.5.54.5.5Patch availableCNA
—glances (PyPI)before 4.5.54.5.5Patch availableGHSA-87qc-fj39-wccr
  • glances Vendornicolargo Affected before 4.5.5 Fixed in 4.5.5 Patch available CNA
  • glances (PyPI) Vendor— Affected before 4.5.5 Fixed in 4.5.5 Patch available GHSA-87qc-fj39-wccr

CPE names Threatist (inferred) · 1

Inferred from how NVD named this product before; not given by a source.

CPEVersionsRoleVendor
cpe:2.3:a:nicolargo:glances:*:*:*:*:*:*:*:*——nicolargo
  • cpe:2.3:a:nicolargo:glances:*:*:*:*:*:*:*:* Versions — — ·nicolargo

Remediation

  • Fix · CNA glances (nicolargo) Fixed in 4.5.5
  • Fix · GHSA-87qc-fj39-wccr glances (PyPI) Fixed in 4.5.5 Advisory →

Vendor assessments

Red Hat

Red Hat's page for this CVE →

Not affected: 1 product
  • Red Hat

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-46608
  2. 2026-10-03 Alias added: GHSA-87qc-fj39-wccr

References

Advisory 2

Other 5

  • TI-2026-25142 Glances's Browser API Exposes Reusable Downstream Credentials via `/api/4/serverslist` CVSS 3.1CRITICAL 9.1
  • TI-2026-25106 Glances exposes the REST API without authentication CVSS 4.0HIGH 8.7
  • TI-2026-48284 Glances: Command injection bypass of action-template sanitizer via cross-field shell-operator reconstruction CVSS 4.0HIGH 8.8
  • TI-2026-44988 OS command injection in nicolargo glances CVSS 3.1HIGH 8.8
  • TI-2026-27083 Glances Vulnerable to Cross-Origin Information Disclosure via Unauthenticated REST API (/api/4) due to Permissive CORS CVSS 4.0HIGH 7.7
  • TI-2026-25120 Glances has a SQL Injection in DuckDB Export via Unparameterized DDL Statements CVSS 3.1CRITICAL 9.1
See all 24 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences