{"answers":{"affected":"3 open source packages ship an affected version, including onnx. It affects 1 product.","exploited":"It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-49114 exists.","fix":"Upgrade onnx to 1.21.0 or later.","what":"CVE-2026-49114 is a medium-severity path traversal vulnerability in ONNX, published on 21 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-2026-49114 and fix it if it is affected.\n\nWhat it is: CVE-2026-49114 is a medium-severity path traversal vulnerability in ONNX, published on 21 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: It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-49114 exists.\n\nAffected packages and fixed versions:\n- onnx (PyPI): affected all versions; fixed in 1.21.0\n- onnx (PyPI): affected all versions; fixed in 1.21.0\n- onnx (PyPI): affected all versions; fixed in 1.21.0\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-2026-49114/ (Markdown: https://insights.sbomify.com/CVE-2026-49114/index.md)","id":"CVE-2026-49114","markdown":"https://insights.sbomify.com/CVE-2026-49114/index.md","name":"CVE-2026-49114","record":{"aliases":["DEBIAN-CVE-2026-49114","ECHO-9c6f-74fc-9d53","GHSA-q56x-g2fj-4rj6","PYSEC-2026-3876","UBUNTU-CVE-2026-49114"],"analysis":{"component_type":"library","fix_type":"upgrade","impacts":["privilege_escalation","code_execution"],"network_reachable":"adjacent_or_local","non_default_config":false,"product_category":"ONNX machine learning library","requires_auth":"none","summary":"A local attacker can exploit symlink following in ONNX to write arbitrary data to sensitive files, potentially leading to privilege escalation or code execution.","user_interaction":"required","vuln_class":"path_traversal"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"cisa-cg","cpe":[{"product":"onnx","vendor":"linuxfoundation"}],"cvss":{"score":6.8,"severity":"medium","source":"cna","vector":"CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N","version":"4.0"},"cwes":[{"id":"CWE-59","name":"Improper Link Resolution Before File Access"},{"id":"CWE-367","name":"Time-of-check Time-of-use (TOCTOU) Race Condition"},{"id":"CWE-22","name":"Improper Limitation of a Pathname to a Restricted Directory"}],"description":"In ONNX before 1.21.0, the 'save_external_data' function builds the external-data file path from the model's external_data location field and opens it for writing without 'O_NOFOLLOW/O_EXCL', after a non-atomic 'os.path.isfile()' check. A local attacker with write access to the directory where a victim serializes external data can deterministically pre-plant a symlink that is being followed, causing the victim's write to append to any file the victim can write, e.g. ~/.ssh/authorized_keys, cron files, or application configs. Fixed in 1.21.0.","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":"ONNX symlink-following and path-traversal arbitrary file write","id":"CVE-2026-49114","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"PyPI","product":null,"products":[],"type":"path_traversal","year":"2026"},"n_packages":3,"n_references":3,"next":{"headline":"This CVE ID has been rejected or withdrawn by its CVE Numbering Authority.","id":"CVE-2026-49117"},"packages":[{"ecosystem":"PyPI","fixed":["1.21.0"],"introduced":["0"],"last_affected":[],"package":"onnx","purl":null,"source":"GHSA-q56x-g2fj-4rj6"},{"ecosystem":"PyPI","fixed":["1.21.0"],"introduced":["0"],"last_affected":[],"package":"onnx","purl":"pkg:pypi/onnx","source":"GHSA-q56x-g2fj-4rj6"},{"ecosystem":"PyPI","fixed":["1.21.0"],"introduced":["0"],"last_affected":[],"package":"onnx","purl":"pkg:pypi/onnx","source":"PYSEC-2026-3876"}],"prev":{"headline":"WordPress Cornerstone plugin \u003c 7.8.8 - Arbitrary Code Execution vulnerability","id":"CVE-2026-49113"},"products":["ONNX"],"published":"2026-08-21","related":[{"cvss_score":8.8,"headline":"Path traversal in n/a","id":"CVE-2025-51480","kev_date_added":null,"published":"2025-07-22"},{"cvss_score":8.8,"headline":"Arbitrary File Overwrite in download_model_with_test_data in onnx/onnx","id":"CVE-2024-5187","kev_date_added":null,"published":"2024-06-06"},{"cvss_score":8.7,"headline":"ONNX: Path Traversal via Symlink","id":"CVE-2026-27489","kev_date_added":null,"published":"2026-04-01"},{"cvss_score":8.6,"headline":"ONNX: Malicious ONNX models can crash servers by exploiting unprotected object settings.","id":"CVE-2026-34445","kev_date_added":null,"published":"2026-04-01"},{"cvss_score":8.6,"headline":"ONNX Untrusted Model Repository Warnings Suppressed by silent=True in onnx.hub.load() — Silent Supply-Chain Attack","id":"CVE-2026-28500","kev_date_added":null,"published":"2026-03-18"},{"cvss_score":7.5,"headline":"Directory Traversal in onnx","id":"CVE-2022-25882","kev_date_added":null,"published":"2023-01-25"}],"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":"poc","technical_impact":"partial"},"state":"PUBLISHED","updated":"2026-08-21","vendors":["ONNX"]},"summary":"A local attacker can exploit symlink following in ONNX to write arbitrary data to sensitive files, potentially leading to privilege escalation or code execution.","url":"https://insights.sbomify.com/CVE-2026-49114/"}