Vulnerability in glances (CVE-2026-46611)
Summary
Vulnerability in glances (CVE-2026-46611). Confidential information can be exposed externally. Exploitable via Host header. Mitigation: upgrade to 4.5.2 or later.
Original description
The description as published by the source.
Summary
The Glances XML-RPC server (glances -s, implemented in glances/server.py) does not validate the HTTP Host header, leaving it vulnerable to DNS rebinding attacks. CVE-2026-32632 (patched in 4.5.2) added TrustedHostMiddleware to the REST/WebUI server; the MCP server has had equivalent protection since 4.5.1. The XML-RPC server received neither fix and has no allowed-hosts configuration key. Combined with the unrestricted Access-Control-Allow-Origin: * header (see companion advisory for CVE-2026-33533 and its incomplete fix), an attacker can exploit DNS rebinding to exfiltrate the full system monitoring dataset from a victim's browser.
Details
Affected component: glances/server.py — GlancesXMLRPCHandler / GlancesXMLRPCServer
Direct URL (commit 04579778e733d705898a169e049dc84772c852da):
- https://github.com/nicolargo/glances/blob/04579778e733d705898a169e049dc84772c852da/glances/server.py
Contrast — patched backends:
- https://github.com/nicolargo/glances/blob/04579778e733d705898a169e049dc84772c852da/glances/outputs/glances_restful_api.py
- https://github.com/nicolargo/glances/blob/04579778e733d705898a169e049dc84772c852da/glances/outputs/glances_mcp.py
The GlancesXMLRPCHandler class inherits from Python's xmlrpc.server.SimpleXMLRPCRequestHandler and does not override parse_request() to inspect or validate the Host header.
Contrast this with the two other Glances server backends, both of which received host-validation…
Source: GitHub Security Advisories (Global) NVD GitHub Advisory
Auto-generated summary
Assembled by SecPulse from the source data (CVSS, CWE, affected versions) using templates — no AI involved. Check the original description and references below for exact details.
A vulnerability tracked as CVE-2026-46611 has been found in glances.
Attackers can target a specific entry point like Host header over the network to misuse the product.
Confidential information can be exposed externally. CVSS score: 5.3/10.
What to do: upgrade glances to 4.5.2 or later.
If unsure, ask your IT team or search "glances CVE-2026-46611" on the vendor's site.
CVE-2026-46611 (glances) — CWE-346 / CVSS v3 5.3
Attack vector: remote (network-reachable) / unauthenticated
Attack surface: Host header / Host / TrustedHostMiddleware / GlancesXMLRPCHandler
Patched: 4.5.2 — apply immediately
Plan: 1) Audit SBOM/dependencies, 2) Stage→prod upgrade, 3) Add WAF/proxy monitoring on affected endpoints, 4) Hunt IOCs in logs.
Refs: see the GHSA / vendor advisory / patched release linked on this page.
A vulnerability (CWE-346) exists in glances. Attackers reach the vulnerable code path via Host header without authentication.
Check the vendor advisory for the affected versions of glances. Attack surface: Host header / Host / TrustedHostMiddleware / GlancesXMLRPCHandler.
Severity: Medium (CVSS 5.3/10). Confidential information can be exposed externally.
Update to 4.5.2.
Until the patch is applied: disable the affected feature, apply WAF rules, or restrict access via network ACLs.
Search webserver/proxy logs for unusual request patterns matching this CVE's known IOCs. Run grep -r 'glances' . against your dependency files (package-lock.json, requirements.txt, go.sum) to find affected services.
Response actions
Concrete steps and command examples for SOC/SRE teams to execute in order
-
1Identify exposure identify
grep -r 'glances' . | grep -v node_modulesリポジトリと本番環境の依存ファイル (package-lock.json / requirements.txt / go.sum / Gemfile.lock 等) で
glancesを grep し、稼働しているサービス・バージョンを把握する。 -
2Apply patch patch
Upgrade glances to 4.5.2ステージング環境で 4.5.2 に上げて回帰テスト → 本番反映。回帰テストはアプリの主要ハッピーパスを含めること。
-
3Post-deployment verification verify
Confirm patched version is live in productionパッチ適用後、ステージングで PoC または同等の悪用パターンを再現して脆弱性が閉じたことを確認。本番ではアクセスログ・WAF でアラート再発が無いか継続監視。
Affected packages
Fix status by distribution
Fixed packages published by each distribution for this CVE
- Debian DEBIAN-CVE-2026-46611 glances
- Ubuntu UBUNTU-CVE-2026-46611 glances
References
- advisory github.com
- advisory nvd.nist.gov
- package github.com
- web github.com
- web github.com
- web github.com
- web pypi.org