{"answers":{"affected":"3 open source packages ship an affected version, including onnx. It affects 1 product.","exploited":"There is no known exploitation of CVE-2026-34445 in the wild and no public exploit code.","fix":"Upgrade onnx to 1.21.0 or later.","what":"CVE-2026-34445 is a high-severity vulnerability in onnx, published on 1 Apr 2026. An attacker can exploit it over the internet without logging in, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2026-34445 and fix it if it is affected.\n\nWhat it is: CVE-2026-34445 is a high-severity vulnerability in onnx, published on 1 Apr 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.\nExploitation: There is no known exploitation of CVE-2026-34445 in the wild and no public exploit code.\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-2026-34445/ (Markdown: https://insights.sbomify.com/CVE-2026-34445/index.md)","id":"CVE-2026-34445","markdown":"https://insights.sbomify.com/CVE-2026-34445/index.md","name":"CVE-2026-34445","record":{"aliases":["AZL-81989","DEBIAN-CVE-2026-34445","ECHO-a26a-b5fe-3ab2","GHSA-538c-55jv-c5g9","PYSEC-2026-2240","UBUNTU-CVE-2026-34445"],"analysis":{"component_type":"library","fix_type":"upgrade","impacts":["denial_of_service"],"network_reachable":"yes","non_default_config":false,"product_category":"ONNX machine learning library","requires_auth":"none","summary":"Attackers can crash servers by uploading malicious ONNX models that overwrite internal object properties via unprotected setattr calls.","user_interaction":"not_required","vuln_class":"other"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"GitHub_M","cpe":[{"product":"onnx","vendor":"linuxfoundation"}],"cvss":{"score":8.6,"severity":"high","source":"cna","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H","version":"3.1"},"cwes":[{"id":"CWE-915","name":"Improperly Controlled Modification of Dynamically-Determined Object Attributes"},{"id":"CWE-400","name":"Uncontrolled Resource Consumption"},{"id":"CWE-20","name":"Improper Input Validation"}],"description":"Open Neural Network Exchange (ONNX) is an open standard for machine learning interoperability. Prior to version 1.21.0, the ExternalDataInfo class in ONNX was using Python’s setattr() function to load metadata (like file paths or data lengths) directly from an ONNX model file. It didn’t check if the \"keys\" in the file were valid. Due to this, an attacker could craft a malicious model that overwrites internal object properties. This issue has been patched in version 1.21.0.","ecosystems":["PyPI"],"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":"ONNX: Malicious ONNX models can crash servers by exploiting unprotected object settings.","id":"CVE-2026-34445","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"PyPI","product":null,"products":[],"type":"other","year":"2026"},"n_packages":3,"n_references":3,"next":{"headline":"ONNX: Arbitrary File Read via ExternalData Hardlink Bypass in ONNX load","id":"CVE-2026-34446"},"packages":[{"ecosystem":"PyPI","fixed":["1.21.0"],"introduced":["0"],"last_affected":[],"package":"onnx","purl":null,"source":"GHSA-538c-55jv-c5g9"},{"ecosystem":"PyPI","fixed":["1.21.0"],"introduced":["0"],"last_affected":[],"package":"onnx","purl":"pkg:pypi/onnx","source":"GHSA-538c-55jv-c5g9"},{"ecosystem":"PyPI","fixed":["1.21.0"],"introduced":["0"],"last_affected":[],"package":"onnx","purl":"pkg:pypi/onnx","source":"PYSEC-2026-2240"}],"prev":{"headline":"Lupa has a Sandbox escape and RCE due to incomplete attribute_filter enforcement in getattr / setattr","id":"CVE-2026-34444"},"products":["onnx"],"published":"2026-04-01","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 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"},{"cvss_score":6.8,"headline":"ONNX symlink-following and path-traversal arbitrary file write","id":"CVE-2026-49114","kev_date_added":null,"published":"2026-08-21"}],"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":"yes","exploitation":"none","technical_impact":"partial"},"state":"PUBLISHED","updated":"2026-04-01","vendors":["onnx"]},"summary":"Attackers can crash servers by uploading malicious ONNX models that overwrite internal object properties via unprotected setattr calls.","url":"https://insights.sbomify.com/CVE-2026-34445/"}