CVE-2026-34839

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Source
https://cve.org/CVERecord?id=CVE-2026-34839
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-34839.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-34839
Aliases
Downstream
Related
Published
2026-04-20T23:09:02.551Z
Modified
2026-07-15T01:49:19.367321914Z
Severity
  • 7.7 (High) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:P CVSS Calculator
Summary
Glances Vulnerable to Cross-Origin Information Disclosure via Unauthenticated REST API (/api/4) due to Permissive CORS
Details

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.

Database specific 
{
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/34xxx/CVE-2026-34839.json",
    "cwe_ids": [
        "CWE-200",
        "CWE-306",
        "CWE-942"
    ],
    "cna_assigner": "GitHub_M"
}
References

Affected packages

Git / github.com/nicolargo/glances

Affected ranges

Type
GIT
Repo
https://github.com/nicolargo/glances
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Fixed
05ff62d883d690809509517dec62684e6c4590d4
Fixed
fdfb977b1d91b5e410bc06c4e19f8bedb0005ce9
Database specific 
{
    "extracted_events": [
        {
            "introduced": "0"
        },
        {
            "fixed": "4.5.4"
        }
    ],
    "source": [
        "CPE_RANGE",
        "REFERENCES"
    ],
    "cpe": "cpe:2.3:a:nicolargo:glances:*:*:*:*:*:*:*:*"
}

Affected versions

v1.*
v1.0
v1.1.2
v1.1.3
v1.2
v1.3
v1.3.1
v1.3.2
v1.3.3
v1.3.4
v1.3.5
v1.3.6
v1.3.7
v1.4
v1.4.1
v1.4.1.1
v1.4.2
v1.4.2.1
v1.5
v1.5.1
v1.5.2
v1.6
v1.6.1
v1.7
v1.7.1
v1.7.2
v1.7.3
v2.*
v2.10
v2.11
v2.2
v2.3
v2.4.1
v2.4.2
v2.5
v2.5.1
v2.7
v2.7.1
v2.7_RC1
v2.8
v2.8.1
v2.8.2
v2.8.3
v2.8.4
v2.8.5
v2.8.6
v2.8.7
v2.8.8
v2.9.0
v2.9.1
v3.*
v3.0
v3.1.0
v3.1.1
v3.1.2
v3.1.3
v3.1.4
v3.1.5
v3.1.6.1
v3.1.7
v3.2.0
v3.2.1
v3.2.2
v3.2.3
v3.2.3.1
v3.2.4
v3.2.4.1
v3.2.4.2
v3.2.5
v3.2.6
v3.2.7
v3.3.0
v3.3.0.1
v3.3.1
v3.4.0
v4.*
v4.2.0
v4.3.0
v4.3.0.1
v4.3.0.2
v4.3.0.3
v4.3.0.6
v4.3.0.7
v4.3.0.8
v4.3.1
v4.3.2
v4.3.3
v4.4.0
v4.4.1
v4.5.0
v4.5.0.1
v4.5.0.2
v4.5.0.3
v4.5.0.4
v4.5.0.5
v4.5.1
v4.5.2
v4.5.3

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-34839.json"