Skip to content
Heist/ feed
UnratedFix available

DEBIAN-CVE-2026-34839

Type: advisorySource: OSV1 source record

Glances is an open-source system cross-platform monitoring tool. Prior to version 4.5.4, the Glances web server exposes a REST API (`/api/4/*`) that is accessible without authentication and allows cross-origin requests from any origin due to a permissive CORS policy (`Access-Control-Allow-Origin: *`). This allows a malicious website to read sensitive system information from a running Glances instance in the victim’s browser, leading to cross-origin data exfiltration. While a previous advisory exists for XML-RPC CORS issues, this report demonstrates that the REST API (`/api/4/*`) is also affected and exposes significantly more sensitive data. Version 4.5.4 patches the issue.

Announced Group revision 1
Original source ↗

DEBIAN-CVE-2026-34839

Primary source · Revision 1

Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.

Security context

Source reference: osv:DEBIAN-CVE-2026-34839

glances

Source reference: /affected/0/package/name

Affected versions
3.3.1.1+dfsg-1

Source reference: /affected/0/versions

3.4.0.3+dfsg-1

Source reference: /affected/0/versions

4.0.5+dfsg-1

Source reference: /affected/0/versions

4.1.2.1+dfsg-1

Source reference: /affected/0/versions

4.2.1+dfsg-1

Source reference: /affected/0/versions

4.3.0.8+dfsg-1

Source reference: /affected/0/versions

4.3.1+dfsg-1

Source reference: /affected/0/versions

4.3.3+dfsg-1

Source reference: /affected/0/versions

4.5.1+dfsg-1

Source reference: /affected/0/versions

4.5.2+dfsg-1

Source reference: /affected/0/versions

4.5.3.2+dfsg-1

Source reference: /affected/0/versions

4.5.4+dfsg-1

Source reference: /affected/0/versions

4.5.5+dfsg-1

Source reference: /affected/0/versions

4.5.6+dfsg-1

Source reference: /affected/0/versions

Fixed versions
Not stated in this record
Prerequisites
Not stated in this record

glances

Source reference: /affected/1/package/name

Affected versions
4.3.1+dfsg-1

Source reference: /affected/1/versions

4.3.3+dfsg-1

Source reference: /affected/1/versions

4.5.1+dfsg-1

Source reference: /affected/1/versions

4.5.2+dfsg-1

Source reference: /affected/1/versions

4.5.3.2+dfsg-1

Source reference: /affected/1/versions

4.5.4+dfsg-1

Source reference: /affected/1/versions

4.5.5+dfsg-1

Source reference: /affected/1/versions

4.5.6+dfsg-1

Source reference: /affected/1/versions

Fixed versions
Not stated in this record
Prerequisites
Not stated in this record

glances

Source reference: /affected/2/package/name

Affected versions
4.3.1+dfsg-1

Source reference: /affected/2/versions

4.3.3+dfsg-1

Source reference: /affected/2/versions

4.5.1+dfsg-1

Source reference: /affected/2/versions

4.5.2+dfsg-1

Source reference: /affected/2/versions

4.5.3.2+dfsg-1

Source reference: /affected/2/versions

Fixed versions
4.5.4+dfsg-1

Source reference: /affected/2/ranges

Prerequisites
Not stated in this record

Structured affected-version data

Original package identities and version rules from this source.

[
  {
    "ranges": [
      {
        "type": "ECOSYSTEM",
        "events": [
          {
            "introduced": "0"
          }
        ]
      }
    ],
    "package": {
      "name": "glances",
      "purl": "pkg:deb/debian/glances?arch=source&distro=bookworm",
      "ecosystem": "Debian:12"
    },
    "versions": [
      "3.3.1.1+dfsg-1",
      "3.4.0.3+dfsg-1",
      "4.0.5+dfsg-1",
      "4.1.2.1+dfsg-1",
      "4.2.1+dfsg-1",
      "4.3.0.8+dfsg-1",
      "4.3.1+dfsg-1",
      "4.3.3+dfsg-1",
      "4.5.1+dfsg-1",
      "4.5.2+dfsg-1",
      "4.5.3.2+dfsg-1",
      "4.5.4+dfsg-1",
      "4.5.5+dfsg-1",
      "4.5.6+dfsg-1"
    ],
    "database_specific": {
      "source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-34839.json"
    },
    "ecosystem_specific": {
      "urgency": "not yet assigned"
    }
  },
  {
    "ranges": [
      {
        "type": "ECOSYSTEM",
        "events": [
          {
            "introduced": "0"
          }
        ]
      }
    ],
    "package": {
      "name": "glances",
      "purl": "pkg:deb/debian/glances?arch=source&distro=trixie",
      "ecosystem": "Debian:13"
    },
    "versions": [
      "4.3.1+dfsg-1",
      "4.3.3+dfsg-1",
      "4.5.1+dfsg-1",
      "4.5.2+dfsg-1",
      "4.5.3.2+dfsg-1",
      "4.5.4+dfsg-1",
      "4.5.5+dfsg-1",
      "4.5.6+dfsg-1"
    ],
    "database_specific": {
      "source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-34839.json"
    },
    "ecosystem_specific": {
      "urgency": "not yet assigned"
    }
  },
  {
    "ranges": [
      {
        "type": "ECOSYSTEM",
        "events": [
          {
            "introduced": "0"
          },
          {
            "fixed": "4.5.4+dfsg-1"
          }
        ]
      }
    ],
    "package": {
      "name": "glances",
      "purl": "pkg:deb/debian/glances?arch=source&distro=forky",
      "ecosystem": "Debian:14"
    },
    "versions": [
      "4.3.1+dfsg-1",
      "4.3.3+dfsg-1",
      "4.5.1+dfsg-1",
      "4.5.2+dfsg-1",
      "4.5.3.2+dfsg-1"
    ],
    "database_specific": {
      "source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-34839.json"
    },
    "ecosystem_specific": {
      "urgency": "not yet assigned"
    }
  }
]

Publisher severity

No explicit severity was provided.

Event
#57548 · Revision 1
Added to Heist Feed
Publisher date
Read the original announcement

Revision history

  1. DEBIAN-CVE-2026-34839 · Revision 1Source updated