{"answers":{"affected":"2 open source packages ship an affected version, including uu_install. It affects 1 product.","exploited":"It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-35355 exists.","fix":"Upgrade uu_install to 0.6.0 or later.","what":"CVE-2026-35355 is a medium-severity vulnerability in Uutils coreutils, published on 22 Apr 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-2026-35355 and fix it if it is affected.\n\nWhat it is: CVE-2026-35355 is a medium-severity vulnerability in Uutils coreutils, published on 22 Apr 2026. It can only be exploited from the same machine or local network, with no action from the victim.\nExploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-35355 exists.\n\nAffected packages and fixed versions:\n- uu_install (crates.io): affected all versions; fixed in 0.6.0\n- uu_install (crates.io): affected all versions; fixed in 0.6.0\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-2026-35355/ (Markdown: https://insights.sbomify.com/CVE-2026-35355/index.md)","id":"CVE-2026-35355","markdown":"https://insights.sbomify.com/CVE-2026-35355/index.md","name":"CVE-2026-35355","record":{"aliases":["DEBIAN-CVE-2026-35355","GHSA-239g-2685-54x3","UBUNTU-CVE-2026-35355"],"analysis":{"component_type":"operating_system","fix_type":"patch","impacts":["privilege_escalation","data_modify"],"network_reachable":"adjacent_or_local","non_default_config":false,"product_category":"uutils coreutils","requires_auth":"low_privilege","summary":"A local attacker can exploit a TOCTOU race condition in the install utility to overwrite arbitrary system files via symlink manipulation, leading to privilege escalation.","user_interaction":"not_required","vuln_class":"race_condition"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"canonical","cpe":[{"product":"coreutils","vendor":"uutils"}],"cvss":{"score":6.3,"severity":"medium","source":"cna","vector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:H/A:H","version":"3.1"},"cwes":[{"id":"CWE-367","name":"Time-of-check Time-of-use (TOCTOU) Race Condition"}],"description":"The install utility in uutils coreutils is vulnerable to a Time-of-Check to Time-of-Use (TOCTOU) race condition during file installation. The implementation unlinks an existing destination file and then recreates it using a path-based operation without the O_EXCL flag. A local attacker can exploit the window between the unlink and the subsequent creation to swap the path with a symbolic link, allowing them to redirect privileged writes to overwrite arbitrary system files.","ecosystems":["crates.io"],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"weaponised"},"has_fix":true,"headline":"uutils coreutils install Arbitrary File Overwrite via Symlink TOCTOU Race","id":"CVE-2026-35355","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"crates.io","product":null,"products":[],"type":"race_condition","year":"2026"},"n_packages":2,"n_references":2,"next":{"headline":"uutils coreutils install Arbitrary File Overwrite with -D via Path Component Symlink Race","id":"CVE-2026-35356"},"packages":[{"ecosystem":"crates.io","fixed":["0.6.0"],"introduced":["0"],"last_affected":[],"package":"uu_install","purl":null,"source":"GHSA-239g-2685-54x3"},{"ecosystem":"crates.io","fixed":["0.6.0"],"introduced":["0"],"last_affected":[],"package":"uu_install","purl":"pkg:cargo/uu_install","source":"GHSA-239g-2685-54x3"}],"prev":{"headline":"uutils coreutils mv Security Xattr TOCTOU Race in Cross-Device","id":"CVE-2026-35354"},"products":["coreutils"],"published":"2026-04-22","related":[{"cvss_score":7.3,"headline":"uutils coreutils chmod Path Traversal Bypass of --preserve-root","id":"CVE-2026-35338","kev_date_added":null,"published":"2026-04-22"},{"cvss_score":7.2,"headline":"uutils coreutils chroot Local Privilege Escalation and chroot Escape in via Name Service Switch (NSS) Injection","id":"CVE-2026-35368","kev_date_added":null,"published":"2026-04-22"},{"cvss_score":7.1,"headline":"uutils coreutils mkfifo Unauthorized Permission Change on Existing Files","id":"CVE-2026-35341","kev_date_added":null,"published":"2026-04-22"},{"cvss_score":7,"headline":"uutils coreutils mkfifo Privilege Escalation via TOCTOU Race Condition","id":"CVE-2026-35352","kev_date_added":null,"published":"2026-04-22"},{"cvss_score":6.7,"headline":"uutils coreutils Path-Based Safety Bypass with --preserve-root","id":"CVE-2026-35349","kev_date_added":null,"published":"2026-04-22"},{"cvss_score":6.6,"headline":"uutils coreutils cp Unexpected Privileged Executable Creation with -p","id":"CVE-2026-35350","kev_date_added":null,"published":"2026-04-22"},{"cvss_score":6.6,"headline":"uutils coreutils mv Denial of Service and Data Duplication via Improper Symlink Expansion","id":"CVE-2026-35365","kev_date_added":null,"published":"2026-04-22"}],"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":"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":"poc","technical_impact":"partial"},"state":"PUBLISHED","updated":"2026-04-22","vendors":["Uutils"]},"summary":"A local attacker can exploit a TOCTOU race condition in the install utility to overwrite arbitrary system files via symlink manipulation, leading to privilege escalation.","url":"https://insights.sbomify.com/CVE-2026-35355/"}