OS Command Injection in glances (CVE-2026-33641)
Summary
OS command injection in glances (CVE-2026-33641). Successful exploitation can lead to full system takeover. Mitigation: upgrade to 4.5.3 or later.
Original description
The description as published by the source.
Summary
Glances supports dynamic configuration values in which substrings enclosed in backticks are executed as system commands during configuration parsing. This behavior occurs in Config.get_value() and is implemented without validation or restriction of the executed commands.
If an attacker can modify or influence configuration files, arbitrary commands will execute automatically with the privileges of the Glances process during startup or configuration reload. In deployments where Glances runs with elevated privileges (e.g., as a system service), this may lead to privilege escalation.
Details
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Glances loads configuration files from user, system, or custom paths during initialization.
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When retrieving a configuration value, Config.get_value() scans for substrings enclosed in backticks.
File: glances/config.py
match = self.re_pattern.findall(ret)
for m in match:
ret = ret.replace(m, system_exec(m[1:-1]))
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The extracted string is passed directly to system_exec().
File: glances/globals.py
res = subprocess.run(command.split(' '), stdout=subprocess.PIPE).stdout.decode('utf-8')
- The command is executed and its output replaces the original configuration value.
This execution occurs automatically whenever the configuration value is read.
Affected Files
glances/config.py — dynamic configuration parsing
glances/globals.py — command execution helper
Proof of Concept (PoC)
Scenario: Arbitrary comman…
Source: OSV.dev (Open Source Vulnerabilities) NVD GitHub Advisory OSV
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-2026-33641 has been found in glances.
Successful exploitation can lead to full system takeover.
What to do: upgrade glances to 4.5.3 or later.
If unsure, ask your IT team or search "glances CVE-2026-33641" on the vendor's site.
CVE-2026-33641 (glances) — CWE-78
Attack vector: local / no user interaction
Patched: 4.5.3 — 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.
OS command injection (CWE-78) exists in glances.
Check the vendor advisory for the affected versions of glances.
Severity: ?. Successful exploitation can lead to full system takeover.
Update to 4.5.3.
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
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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 4.5.3ステージング環境で 4.5.3 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。
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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-2026-33641 glances
- Ubuntu UBUNTU-CVE-2026-33641 glances
References
- advisory nvd.nist.gov
- package github.com
- web github.com
- web github.com
- web github.com