{"answers":{"affected":"5 open source packages ship an affected version, including openc3. It affects 1 product.","exploited":"There is no known exploitation of CVE-2026-42085 in the wild and no public exploit code.","fix":"Upgrade openc3 to a fixed version for your release line: 6.10.5 or 7.0.0-rc3.","what":"CVE-2026-42085 is a medium-severity path traversal vulnerability in OpenC3 cosmos, published on 4 May 2026. Any signed-in user can exploit it over the network, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2026-42085 and fix it if it is affected.\n\nWhat it is: CVE-2026-42085 is a medium-severity path traversal vulnerability in OpenC3 cosmos, published on 4 May 2026. Any signed-in user can exploit it over the network, with no action from the victim.\nExploitation: There is no known exploitation of CVE-2026-42085 in the wild and no public exploit code.\n\nAffected packages and fixed versions:\n- openc3 (PyPI): affected all versions; fixed in 6.10.5\n- openc3 (RubyGems): affected all versions; fixed in 6.10.5\n- openc3 (RubyGems): affected all versions; fixed in 6.10.5\n- openc3 (RubyGems): affected from 7.0.0.pre.rc1; fixed in 7.0.0-rc3\n- openc3 (RubyGems): affected from 7.0.0.pre.rc1; fixed in 7.0.0-rc3\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-2026-42085/ (Markdown: https://insights.sbomify.com/CVE-2026-42085/index.md)","id":"CVE-2026-42085","markdown":"https://insights.sbomify.com/CVE-2026-42085/index.md","name":"CVE-2026-42085","record":{"aliases":["GHSA-4jvx-93h3-f45h","PYSEC-2026-2243"],"analysis":{"component_type":"web_application","fix_type":"upgrade","impacts":["data_modify"],"network_reachable":"yes","non_default_config":false,"product_category":"OpenC3 COSMOS","requires_auth":"low_privilege","summary":"Attackers can overwrite configuration files in the shared plugins directory by crafting filenames, potentially compromising system integrity.","user_interaction":"not_required","vuln_class":"path_traversal"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"GitHub_M","cpe":[{"product":"cosmos","vendor":"openc3"}],"cvss":{"score":4.3,"severity":"medium","source":"cna","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N","version":"3.1"},"cwes":[{"id":"CWE-23","name":"Relative Path Traversal"}],"description":"OpenC3 COSMOS provides the functionality needed to send commands to and receive data from one or more embedded systems. Prior to versions 6.10.5 and 7.0.0-rc3, OpenC3 COSMOS contains a design flaw in the save_tool_config() function that allows saving tool configuration files at arbitrary locations inside the shared /plugins directory tree by supplying crafted configuration filenames. Although the implementation sufficiently mitigates standard path traversal attacks, by canonicalizing filename to an absolute path, all plugins share this same root directory. That enables users to create arbitrary file structures and overwrite existing configuration files within the shared /plugins directory. This issue has been patched in versions 6.10.5 and 7.0.0-rc3.","ecosystems":["PyPI","RubyGems"],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"none_known"},"has_fix":true,"headline":"OpenC3 COSMOS: Arbitrary write to plugins directory via path-traversed config filenames","id":"CVE-2026-42085","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"PyPI","product":null,"products":[],"type":"path_traversal","year":"2026"},"n_packages":5,"n_references":5,"next":{"headline":"OpenC3 COSMOS: Self-XSS in the Command Sender","id":"CVE-2026-42086"},"packages":[{"ecosystem":"PyPI","fixed":["6.10.5"],"introduced":["0"],"last_affected":[],"package":"openc3","purl":"pkg:pypi/openc3","source":"PYSEC-2026-2243"},{"ecosystem":"RubyGems","fixed":["6.10.5"],"introduced":["0"],"last_affected":[],"package":"openc3","purl":null,"source":"GHSA-4jvx-93h3-f45h"},{"ecosystem":"RubyGems","fixed":["6.10.5"],"introduced":["0"],"last_affected":[],"package":"openc3","purl":"pkg:gem/openc3","source":"GHSA-4jvx-93h3-f45h"},{"ecosystem":"RubyGems","fixed":["7.0.0-rc3"],"introduced":["7.0.0.pre.rc1"],"last_affected":[],"package":"openc3","purl":null,"source":"GHSA-4jvx-93h3-f45h"},{"ecosystem":"RubyGems","fixed":["7.0.0-rc3"],"introduced":["7.0.0.pre.rc1"],"last_affected":[],"package":"openc3","purl":"pkg:gem/openc3","source":"GHSA-4jvx-93h3-f45h"}],"prev":{"headline":"OpenC3 COSMOS: Hijacked session token can be used to reset password for persistence","id":"CVE-2026-42084"},"products":["cosmos"],"published":"2026-05-04","related":[{"cvss_score":9.8,"headline":"Code injection in n/a","id":"CVE-2025-28386","kev_date_added":null,"published":"2025-06-13"},{"cvss_score":9.8,"headline":"Hardcoded credentials in n/a","id":"CVE-2025-28388","kev_date_added":null,"published":"2025-06-13"},{"cvss_score":9.8,"headline":"Weak cryptography in n/a","id":"CVE-2025-28389","kev_date_added":null,"published":"2025-06-13"},{"cvss_score":9.6,"headline":"OpenC3 COSMOS: SQL Injection in QuestDB Time-Series Data Base","id":"CVE-2026-42087","kev_date_added":null,"published":"2026-05-04"},{"cvss_score":9.6,"headline":"OpenC3 COSMOS: Administrative Actions via the Script Runner Tool","id":"CVE-2026-42088","kev_date_added":null,"published":"2026-05-04"},{"cvss_score":9.1,"headline":"OpenC3 COSMOS Vulnerable to Directory Traversal via /script-api/scripts/ endpoint","id":"CVE-2025-28384","kev_date_added":null,"published":"2025-06-13"},{"cvss_score":8.1,"headline":"OpenC3 COSMOS: Hijacked session token can be used to reset password for persistence","id":"CVE-2026-42084","kev_date_added":null,"published":"2026-05-04"}],"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":"no","exploitation":"none","technical_impact":"partial"},"state":"PUBLISHED","updated":"2026-05-04","vendors":["OpenC3"]},"summary":"Attackers can overwrite configuration files in the shared plugins directory by crafting filenames, potentially compromising system integrity.","url":"https://insights.sbomify.com/CVE-2026-42085/"}