{"answers":{"affected":"It affects 3 products.","exploited":"There is no known exploitation of CVE-2026-18477 in the wild and no public exploit code.","fix":"Apply the vendor's patch.","what":"CVE-2026-18477 is a medium-severity vulnerability in Redhat Enterprise Linux, published on 3 Aug 2026. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link."},"fix_prompt":"Check this codebase for CVE-2026-18477 and fix it if it is affected.\n\nWhat it is: CVE-2026-18477 is a medium-severity vulnerability in Redhat Enterprise Linux, published on 3 Aug 2026. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.\nExploitation: There is no known exploitation of CVE-2026-18477 in the wild and no public exploit code.\n\nAffected product: Redhat Enterprise Linux. 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-2026-18477/ (Markdown: https://insights.sbomify.com/CVE-2026-18477/index.md)","id":"CVE-2026-18477","markdown":"https://insights.sbomify.com/CVE-2026-18477/index.md","name":"CVE-2026-18477","record":{"aliases":["AZL-94602","CLSA-2026-1787335320","CLSA-2026-1787337920","DEBIAN-CVE-2026-18477","ECHO-b8d2-238f-d46b","GHSA-v7fx-gjvh-347c","JLSEC-2026-1344","MINI-f95f-ccg5-864x","OESA-2026-3597","OESA-2026-3598","OESA-2026-3599","OESA-2026-3600","OESA-2026-3870","RHSA-2026:49361","UBUNTU-CVE-2026-18477"],"analysis":{"component_type":"operating_system","fix_type":"patch","impacts":["data_modify","privilege_escalation"],"network_reachable":"adjacent_or_local","non_default_config":false,"product_category":"GNU tar utility","requires_auth":"low_privilege","summary":"A local attacker can exploit a race condition in GNU tar's restore process to modify files outside the target directory, potentially leading to privilege escalation.","user_interaction":"required","vuln_class":"race_condition"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"redhat","cpe":[{"product":"tar","vendor":"gnu"},{"product":"enterprise_linux","vendor":"redhat"},{"product":"openshift_container_platform","vendor":"redhat"}],"cvss":{"score":4.4,"severity":"medium","source":"cna","vector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:U/C:N/I:H/A:N","version":"3.1"},"cwes":[{"id":"CWE-367","name":"Time-of-check Time-of-use (TOCTOU) Race Condition"}],"description":"A TOCTOU (Time-of-Check Time-of-Use) vulnerability in GNU tar's incremental dumpdir 'X' rename handling allows a local attacker with write access to a directory being backed up to influence the restore process if the attacker has access to the system where the restore is being performed. During restoration, files or directories may be created, renamed or overwritten outside the intended extraction directory. This could lead to unauthorized file modification or, in some cases, privilege escalation. Exploitation does not require the attacker to modify or craft the archive, and standard backup and restore workflows—including extracting into a newly created directory without using the -P option do not mitigate the issue.","ecosystems":["Red Hat:hummingbird:1"],"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":"Tar: tar: toctou in incremental dumpdir 'x' rename handling allows restore path escape","id":"CVE-2026-18477","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":"redhat:enterprise_linux","products":["redhat:enterprise_linux","redhat:openshift_container_platform"],"type":"race_condition","year":"2026"},"n_packages":1,"n_references":8,"next":{"headline":"Stored XSS in Magnolia CMS","id":"CVE-2026-18478"},"packages":[{"ecosystem":"Red Hat:hummingbird:1","fixed":["0:1.35-9.1.hum1"],"introduced":["0"],"last_affected":[],"package":"tar","purl":"pkg:rpm/redhat/tar","source":"RHSA-2026:49361"}],"prev":{"headline":"WP Directory Kit \u003c 1.5.6 - Unauthenticated SQL Injection via search_location and search_category","id":"CVE-2026-18474"},"products":["Red Hat Discovery 2","Red Hat Enterprise Linux 10","Red Hat Enterprise Linux 6","Red Hat Enterprise Linux 7","Red Hat Enterprise Linux 8","Red Hat Enterprise Linux 9","Red Hat Hardened Images","Red Hat OpenShift Container Platform 4","Red Hat Update Infrastructure 5"],"published":"2026-08-03","related":[{"cvss_score":10,"headline":"Privilege escalation in n/a","id":"CVE-2005-2541","kev_date_added":null,"published":"2005-08-10"},{"cvss_score":7.5,"headline":"Null dereference in n/a","id":"CVE-2019-9923","kev_date_added":null,"published":"2019-03-22"},{"cvss_score":7.5,"headline":"Path traversal in n/a","id":"CVE-2016-6321","kev_date_added":null,"published":"2016-12-09"},{"cvss_score":6.8,"headline":"Path traversal in n/a","id":"CVE-2007-4131","kev_date_added":null,"published":"2007-08-25"},{"cvss_score":6.2,"headline":"Denial of service in n/a","id":"CVE-2023-39804","kev_date_added":null,"published":"2024-03-27"},{"cvss_score":5.1,"headline":"Memory corruption in n/a","id":"CVE-2006-0300","kev_date_added":null,"published":"2006-02-24"},{"cvss_score":5,"headline":"Tar: tar: hidden file injection via crafted archives","id":"CVE-2026-5704","kev_date_added":null,"published":"2026-04-06"}],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"class":"attribution","licence":"CC BY 4.0","name":"Red Hat","prefix":"RHSA"},{"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":"2026-09-22","vendors":["Red Hat"]},"summary":"A local attacker can exploit a race condition in GNU tar's restore process to modify files outside the target directory, potentially leading to privilege escalation.","url":"https://insights.sbomify.com/CVE-2026-18477/"}