{"answers":{"affected":"","exploited":"There is no known exploitation of CVE-2026-90616 in the wild and no public exploit code.","fix":"Upgrade to a fixed version.","what":"CVE-2026-90616 is a high-severity path traversal vulnerability in Flatpak, published on 12 Sep 2026. It can only be exploited from the same machine or local network, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2026-90616 and fix it if it is affected.\n\nWhat it is: CVE-2026-90616 is a high-severity path traversal vulnerability in Flatpak, published on 12 Sep 2026. It can only be exploited from the same machine or local network, with no action from the victim.\nExploitation: There is no known exploitation of CVE-2026-90616 in the wild and no public exploit code.\n\nAffected product: Flatpak. No package-level version data is available, so check the vendor advisory linked from the reference page.\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-2026-90616/ (Markdown: https://insights.sbomify.com/CVE-2026-90616/index.md)","id":"CVE-2026-90616","markdown":"https://insights.sbomify.com/CVE-2026-90616/index.md","name":"CVE-2026-90616","record":{"aliases":["CLSA-2026-1789577977","CLSA-2026-1789979782","CLSA-2026-1790035964","DEBIAN-CVE-2026-90616","GHSA-8688-9x26-hhxj","GHSA-vhx5-8pfj-7wrv","OESA-2026-4098","UBUNTU-CVE-2026-90616"],"analysis":{"component_type":"operating_system","fix_type":"upgrade","impacts":["code_execution","data_read","data_modify"],"network_reachable":"adjacent_or_local","non_default_config":false,"product_category":"Flatpak sandbox","requires_auth":"none","summary":"A malicious sandboxed app can exploit missing symlink protection to access host files and execute arbitrary code on the host system.","user_interaction":"not_required","vuln_class":"path_traversal"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"mitre","cpe":[],"cvss":{"score":7.4,"severity":"high","source":"cna","vector":"CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H","version":"3.1"},"cwes":[{"id":"CWE-61","name":"UNIX Symbolic Link (Symlink) Following"}],"description":"In Flatpak before 1.18.1, a malicious sandboxed app can obtain arbitrary read and write access to files on the host, which can be escalated to arbitrary code execution on the host, a different vulnerability than CVE-2026-76925. Flatpak creates a few app data directories (e.g., /var/cache, /var/data, /var/config, and /var/tmp) in every sandbox on every app launch where, in some cases, components of the path are attacker-controlled. Missing symlink protection can redirect the directories. Some of these directories are bind-mounted by Flatpak by passing the path (e.g., /home/user/.var/app/APP_ID/cache/tmp), which contains attacker-controlled directories (tmp) to bwrap --bind SRC DST. bwrap passes the path on to the kernel, which then follows symlinks. A malicious symlink can point to arbitrary locations on the host and it will become mounted inside the sandbox.","ecosystems":[],"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":"Path traversal in Flatpak","id":"CVE-2026-90616","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"path_traversal","year":"2026"},"n_packages":0,"n_references":2,"next":{"headline":"GH05TCREW PentestAgent MCP HTTP Server main.py run_task os command injection","id":"CVE-2026-90617"},"packages":[],"prev":{"headline":"SourceCodester Class and Exam Timetabling System subject1.php cross site scripting","id":"CVE-2026-90615"},"products":["Flatpak"],"published":"2026-09-12","related":[],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"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":"total"},"state":"PUBLISHED","updated":"2026-09-14","vendors":["Flatpak"]},"summary":"A malicious sandboxed app can exploit missing symlink protection to access host files and execute arbitrary code on the host system.","url":"https://insights.sbomify.com/CVE-2026-90616/"}