{ "document": { "category": "csaf_base", "csaf_version": "2.0", "distribution": { "tlp": { "label": "WHITE" } }, "lang": "en", "notes": [ { "category": "legal_disclaimer", "text": "The Netherlands Cyber Security Center (henceforth: NCSC-NL) maintains this portal to enhance access to its information and vulnerabilities. The use of this information is subject to the following terms and conditions:\n\nThe vulnerabilities disclosed in this portal are gathered by NCSC-NL from a variety of open sources, which the user can retrieve from other platforms. NCSC-NL makes every reasonable effort to ensure that the content of this portal is kept up to date, and that it is accurate and complete. Nevertheless, NCSC-NL cannot entirely rule out the possibility of errors, and therefore cannot give any warranty in respect of its completeness, accuracy or real-time keeping up-to-date. NCSC-NL does not control nor guarantee the accuracy, relevance, timeliness or completeness of information obtained from these external sources. The vulnerabilities disclosed in this portal are intended solely for the convenience of professional parties to take appropriate measures to manage the risks posed to the cybersecurity. No rights can be derived from the information provided therein.\n\nNCSC-NL and the Kingdom of the Netherlands assume no legal liability or responsibility for any damage resulting from either the use or inability of use of the vulnerabilities disclosed in this portal. This includes damage resulting from the inaccuracy of incompleteness of the information contained in it.\nThe information on this page is subject to Dutch law. All disputes related to or arising from the use of this portal regarding the disclosure of vulnerabilities will be submitted to the competent court in The Hague. This choice of means also applies to the court in summary proceedings." } ], "publisher": { "category": "coordinator", "contact_details": "cert@ncsc.nl", "name": "National Cyber Security Centre", "namespace": "https://www.ncsc.nl/" }, "title": "CVE-2026-33641", "tracking": { "current_release_date": "2026-04-03T15:32:58.931167Z", "generator": { "date": "2026-02-17T15:00:00Z", "engine": { "name": "V.E.L.M.A", "version": "1.7" } }, "id": "CVE-2026-33641", "initial_release_date": "2026-03-30T17:42:06.092045Z", "revision_history": [ { "date": "2026-03-30T17:42:06.092045Z", "number": "1", "summary": "CVE created.| Source created.| CVE status created. (valid)| Description created for source.| CVSS created.| References created (2).| CWES updated (1)." }, { "date": "2026-03-30T17:42:12.366105Z", "number": "2", "summary": "NCSC Score created." }, { "date": "2026-04-01T07:14:54.818954Z", "number": "3", "summary": "Source connected.| CVE status created. (valid)| Description created for source.| Products created (1)." }, { "date": "2026-04-01T07:15:02.029505Z", "number": "4", "summary": "NCSC Score updated." }, { "date": "2026-04-02T15:28:37.123954Z", "number": "5", "summary": "Source created.| CVE status created. (valid)| Description created for source.| CVSS created.| References created (3).| CWES updated (1)." }, { "date": "2026-04-02T15:28:38.928963Z", "number": "6", "summary": "NCSC Score updated." }, { "date": "2026-04-02T15:41:43.814309Z", "number": "7", "summary": "Source created.| CVE status created. (valid)| Description created for source.| CVSS created.| Products created (1).| References created (3).| CWES updated (1)." }, { "date": "2026-04-02T15:41:53.767389Z", "number": "8", "summary": "NCSC Score updated." }, { "date": "2026-04-02T17:39:24.662657Z", "number": "9", "summary": "Unknown change." }, { "date": "2026-04-03T09:27:22.054674Z", "number": "10", "summary": "NCSC Score updated." }, { "date": "2026-04-03T12:43:07.881349Z", "number": "11", "summary": "Source created.| CVE status created. (valid)| Description created for source.| Products connected (1)." }, { "date": "2026-04-03T12:43:12.818975Z", "number": "12", "summary": "NCSC Score updated." }, { "date": "2026-04-03T15:32:50.514821Z", "number": "13", "summary": "Source connected.| CVE status created. (valid)| EPSS created." }, { "date": "2026-04-03T15:32:56.206063Z", "number": "14", "summary": "NCSC Score updated." } ], "status": "interim", "version": "14" } }, "product_tree": { "branches": [ { "branches": [ { "branches": [ { "branches": [ { "category": "product_version_range", "name": "vers:deb/unknown", "product": { "name": "vers:deb/unknown", "product_id": "CSAFPID-5843883" } } ], "category": "product_name", "name": "glances" } ], "category": "product_family", "name": "bookworm" } ], "category": "vendor", "name": "Debian" }, { "branches": [ { "branches": [ { "category": "product_version_range", "name": "vers:unknown/<4.5.3", "product": { "name": "vers:unknown/<4.5.3", "product_id": "CSAFPID-5985006" } } ], "category": "product_name", "name": "glances" } ], "category": "vendor", "name": "nicolargo" }, { "branches": [ { "branches": [ { "category": "product_version_range", "name": "vers:unknown/<=4.5.2", "product": { "name": "vers:unknown/<=4.5.2", "product_id": "CSAFPID-5970833" } } ], "category": "product_name", "name": "glances" } ], "category": "vendor", "name": "unknown" } ] }, "vulnerabilities": [ { "cve": "CVE-2026-33641", "cwe": { "id": "CWE-78", "name": "Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')" }, "notes": [ { "category": "description", "text": "## Summary\nGlances 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.\n\nIf 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.\n\n## Details\n\n1. Glances loads configuration files from user, system, or custom paths during initialization.\n2. When retrieving a configuration value, Config.get_value() scans for substrings enclosed in backticks.\n\n **File: glances/config.py**\n \n```\nmatch = self.re_pattern.findall(ret)\nfor m in match:\n ret = ret.replace(m, system_exec(m[1:-1]))\n```\n\n\n3. The extracted string is passed directly to system_exec().\n\n **File: glances/globals.py**\n \n \n```sh\nres = subprocess.run(command.split(' '), stdout=subprocess.PIPE).stdout.decode('utf-8')\n```\n\n4. The command is executed and its output replaces the original configuration value.\n\nThis execution occurs automatically whenever the configuration value is read.\n\n### Affected Files\n\n glances/config.py — dynamic configuration parsing\n\n glances/globals.py — command execution helper\n\n## Proof of Concept (PoC)\n\nScenario: Arbitrary command execution via configuration value\n\n**Step 1 — Create malicious configuration file**\n\n```sh\n/tmp/glances.conf\n```\n\nadd below txt on the file\n\n```\n[outputs]\nurl_prefix = 'id'\n```\n\n**Step 2 — Launch Glances with custom configuration**\n\n```sh\nglances -C /tmp/glances.conf\n```\n\n**Step 3 — Observe behavior**\n\nWhen Glances reads the configuration:\n\n - The command inside backticks is executed\n - Output replaces the configuration value\n - Execution occurs without user interaction\n \n \n Reproduce using Python code\n \n \n```\nimport subprocess\nimport re\n\ndef system_exec(command):\n return subprocess.run(command.split(' '), stdout=subprocess.PIPE).stdout.decode().strip()\n\nvalue = \"`id`\"\npattern = re.compile(r'(`.+?`)')\n\nfor m in pattern.findall(value):\n print(system_exec(m[1:-1]))\n```\n\n**Output:**\n\n\n`uid=1000(user) gid=1000(user) groups=1000(user)`\n\n## Impact\n\n### Arbitrary Command Execution\n\nAny command enclosed in backticks inside a configuration value will execute with the privileges of the Glances process.\n\n### Potential Privilege Escalation\n\nIf Glances runs as a privileged service (e.g., root), commands execute with those privileges.\n\nPossible scenarios include:\n\n- Misconfigured file permissions allowing unauthorized config modification\n- Shared systems where configuration directories are writable by multiple users\n- Container environments with mounted configuration volumes\n- Automated configuration management systems that ingest untrusted data", "title": "github - https://api.github.com/advisories/GHSA-qhj7-v7h7-q4c7" }, { "category": "description", "text": "Affected versions of the Glances package are vulnerable to Command Injection due to unsafe execution of dynamic configuration values enclosed in backticks. The Config.get_value() method in glances/config.py detects backtick-delimited substrings in configuration entries and passes them directly to system_exec() in glances/globals.py, which executes the supplied command without validation or restriction.", "title": "pyupio - https://raw.githubusercontent.com/pyupio/safety-db/refs/heads/master/data/insecure_full.json" }, { "category": "description", "text": "Glances is an open-source system cross-platform monitoring tool. Prior to version 4.5.3, 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. This issue has been patched in version 4.5.3.", "title": "nvd - https://services.nvd.nist.gov/rest/json/cves/2.0?cveId=CVE-2026-33641" }, { "category": "description", "text": "Glances is an open-source system cross-platform monitoring tool. Prior to version 4.5.3, 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. This issue has been patched in version 4.5.3.", "title": "cveprojectv5 - https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2026/33xxx/CVE-2026-33641.json" }, { "category": "description", "text": "Glances is an open-source system cross-platform monitoring tool. Prior to version 4.5.3, 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. This issue has been patched in version 4.5.3.", "title": "debian - https://security-tracker.debian.org/tracker/CVE-2026-33641" }, { "category": "other", "text": "0.00018", "title": "EPSS" }, { "category": "other", "text": "3.7", "title": "NCSC Score" }, { "category": "other", "text": "The value of the most recent EPSS score, There is cwe data available from source Nvd, Is related to a product by vendor Unknown", "title": "NCSC Score top decreasing factors" } ], "product_status": { "known_affected": [ "CSAFPID-5970833", "CSAFPID-5985006", "CSAFPID-5843883" ] }, "references": [ { "category": "external", "summary": "Source - github", "url": "https://api.github.com/advisories/GHSA-qhj7-v7h7-q4c7" }, { "category": "external", "summary": "Source - pyupio", "url": "https://raw.githubusercontent.com/pyupio/safety-db/refs/heads/master/data/insecure_full.json" }, { "category": "external", "summary": "Source - nvd", "url": "https://services.nvd.nist.gov/rest/json/cves/2.0?cveId=CVE-2026-33641" }, { "category": "external", "summary": "Source - cveprojectv5", "url": "https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2026/33xxx/CVE-2026-33641.json" }, { "category": "external", "summary": "Source - debian", "url": "https://security-tracker.debian.org/tracker/CVE-2026-33641" }, { "category": "external", "summary": "Source - first", "url": "https://api.first.org/data/v1/epss?limit=10000&offset=0" }, { "category": "external", "summary": "Reference - cveprojectv5; github; nvd", "url": "https://github.com/nicolargo/glances/security/advisories/GHSA-qhj7-v7h7-q4c7" }, { "category": "external", "summary": "Reference - github", "url": "https://github.com/advisories/GHSA-qhj7-v7h7-q4c7" }, { "category": "external", "summary": "Reference - cveprojectv5; nvd", "url": "https://github.com/nicolargo/glances/commit/358d76a225fc21a9f95d2c4d7e46fafe64a644c6" }, { "category": "external", "summary": "Reference - cveprojectv5; nvd", "url": "https://github.com/nicolargo/glances/releases/tag/v4.5.3" } ], "scores": [ { "cvss_v3": { "version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "baseScore": 7.8, "baseSeverity": "HIGH" }, "products": [ "CSAFPID-5843883", "CSAFPID-5970833", "CSAFPID-5985006" ] } ], "title": "CVE-2026-33641" } ] }