{"answers":{"affected":"3 open source packages ship an affected version, including glances and Glances. It affects 1 product.","exploited":"It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-34839 exists.","fix":"Upgrade glances to 4.5.4 or later.","what":"CVE-2026-34839 is a high-severity vulnerability in nicolargo glances, published on 20 Apr 2026. An attacker can exploit it over the internet without logging in, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2026-34839 and fix it if it is affected.\n\nWhat it is: CVE-2026-34839 is a high-severity vulnerability in nicolargo glances, published on 20 Apr 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.\nExploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-34839 exists.\n\nAffected packages and fixed versions:\n- glances (PyPI): affected all versions; fixed in 4.5.4\n- glances (PyPI): affected all versions; fixed in 4.5.4\n- Glances (PyPI): affected all versions; fixed in 4.5.4\n\nTask:\n1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.\n2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.\n3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.\n4. Run the tests and summarise what changed and why.\n5. If nothing in the project is affected, say so and change nothing.\n\nReference: https://insights.sbomify.com/CVE-2026-34839/ (Markdown: https://insights.sbomify.com/CVE-2026-34839/index.md)","id":"CVE-2026-34839","markdown":"https://insights.sbomify.com/CVE-2026-34839/index.md","name":"CVE-2026-34839","record":{"aliases":["DEBIAN-CVE-2026-34839","GHSA-gfc2-9qmw-w7vh","PYSEC-2026-2175","UBUNTU-CVE-2026-34839"],"analysis":{"component_type":"server_software","fix_type":"upgrade","impacts":["data_read"],"network_reachable":"yes","non_default_config":false,"product_category":"System monitoring tool","requires_auth":"none","summary":"A malicious website can read sensitive system information from a running Glances instance via its unauthenticated REST API due to permissive CORS settings.","user_interaction":"not_required","vuln_class":"information_disclosure"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"GitHub_M","cpe":[{"product":"glances","vendor":"nicolargo"}],"cvss":{"score":7.7,"severity":"high","source":"cna","vector":"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","version":"4.0"},"cwes":[{"id":"CWE-942","name":"Permissive Cross-domain Security Policy with Untrusted Domains"},{"id":"CWE-306","name":"Missing Authentication for Critical Functionality"},{"id":"CWE-200","name":"Exposure of Sensitive Information to an Unauthorized Actor"}],"description":"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.","ecosystems":["PyPI"],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"weaponised"},"has_fix":true,"headline":"Glances Vulnerable to Cross-Origin Information Disclosure via Unauthenticated REST API (/api/4) due to Permissive CORS","id":"CVE-2026-34839","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"PyPI","product":null,"products":[],"type":"information_disclosure","year":"2026"},"n_packages":3,"n_references":2,"next":{"headline":"OneUptime SSO: Multi-Assertion Identity Injection via Decoupled Signature Verification","id":"CVE-2026-34840"},"packages":[{"ecosystem":"PyPI","fixed":["4.5.4"],"introduced":["0"],"last_affected":[],"package":"Glances","purl":null,"source":"GHSA-gfc2-9qmw-w7vh"},{"ecosystem":"PyPI","fixed":["4.5.4"],"introduced":["0"],"last_affected":[],"package":"glances","purl":"pkg:pypi/glances","source":"GHSA-gfc2-9qmw-w7vh"},{"ecosystem":"PyPI","fixed":["4.5.4"],"introduced":["0"],"last_affected":[],"package":"glances","purl":"pkg:pypi/glances","source":"PYSEC-2026-2175"}],"prev":{"headline":"Group-Office: Authenticated Remote Code Execution via PHP Insecure Deserialization in `AbstractSettingsCollection`","id":"CVE-2026-34838"},"products":["glances"],"published":"2026-04-20","related":[{"cvss_score":9.1,"headline":"Glances's Browser API Exposes Reusable Downstream Credentials via `/api/4/serverslist`","id":"CVE-2026-32633","kev_date_added":null,"published":"2026-03-18"},{"cvss_score":8.7,"headline":"Glances exposes the REST API without authentication","id":"CVE-2026-32596","kev_date_added":null,"published":"2026-03-18"},{"cvss_score":8.7,"headline":"Glances Exposes Unauthenticated Configuration Secrets","id":"CVE-2026-30928","kev_date_added":null,"published":"2026-03-10"},{"cvss_score":8.1,"headline":"Glances's Default CORS Configuration Allows Cross-Origin Credential Theft","id":"CVE-2026-32610","kev_date_added":null,"published":"2026-03-18"},{"cvss_score":8.1,"headline":"Glances Central Browser Autodiscovery Leaks Reusable Credentials to Zeroconf-Spoofed Servers","id":"CVE-2026-32634","kev_date_added":null,"published":"2026-03-18"},{"cvss_score":7.8,"headline":"Glances Vulnerable to Command Injection via Dynamic Configuration Values","id":"CVE-2026-33641","kev_date_added":null,"published":"2026-04-02"}],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"class":"attribution","licence":"CC BY 4.0","name":"GitHub Advisory Database","prefix":"GHSA"},{"class":"attribution","licence":"CC BY 4.0","name":"PyPA Advisory Database","prefix":"PYSEC"},{"class":"attribution","licence":"US public information, NVD API terms","name":"NVD"},{"class":"attribution","licence":"CWE Terms of Use","name":"CWE (MITRE)"},{"class":"attribution","licence":"FIRST CVSS licence","name":"CVSS (FIRST)"}],"ssvc":{"automatable":"yes","exploitation":"poc","technical_impact":"partial"},"state":"PUBLISHED","updated":"2026-04-21","vendors":["nicolargo"]},"summary":"A malicious website can read sensitive system information from a running Glances instance via its unauthenticated REST API due to permissive CORS settings.","url":"https://insights.sbomify.com/CVE-2026-34839/"}