{"answers":{"affected":"2 open source packages ship an affected version, including onnx.","exploited":"There is no known exploitation of CVE-2026-115920 in the wild and no public exploit code.","fix":"Upgrade onnx to 1.22.0 or later.","what":"CVE-2026-115920 is a medium-severity vulnerability in onnx, published on 26 Oct 2026."},"fix_prompt":"Check this codebase for CVE-2026-115920 and fix it if it is affected.\n\nWhat it is: CVE-2026-115920 is a medium-severity vulnerability in onnx, published on 26 Oct 2026. \nExploitation: There is no known exploitation of CVE-2026-115920 in the wild and no public exploit code.\n\nAffected packages and fixed versions:\n- onnx (PyPI): affected from 1.2.1; fixed in 1.22.0\n- onnx (PyPI): affected from 1.2.1; fixed in 1.22.0\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-2026-115920/ (Markdown: https://insights.sbomify.com/CVE-2026-115920/index.md)","id":"CVE-2026-115920","markdown":"https://insights.sbomify.com/CVE-2026-115920/index.md","name":"CVE-2026-115920","record":{"aliases":["DEBIAN-CVE-2026-115920","ECHO-36c8-f2f9-8140","GHSA-6pwm-x34p-fvj2","UBUNTU-CVE-2026-115920"],"analysis":null,"analysis_generated_by":null,"assigner":"GitHub_M","cpe":[],"cvss":{"score":6.2,"severity":"medium","source":"cna","vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","version":"3.1"},"cwes":[{"id":"CWE-125","name":"Out-of-bounds Read"}],"description":"Open Neural Network Exchange (ONNX) is an open standard for machine learning interoperability. From 1.2.1 until 1.22.0, ConvTranspose shape inference processes a weight tensor with fewer than three dimensions without a kernel_shape attribute by deriving an empty effective_kernel_shape and indexing it for the input's spatial dimensions. The flaw affects convTransposeShapeInference_opset11() and the current inference path, and an untrusted model that can pass onnx.checker.check_model() can crash onnx.shape_inference.infer_shapes(), causing denial of service without demonstrated confidentiality or integrity impact. This issue is fixed in version 1.22.0.","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: Out-of-bounds read in ConvTranspose shape inference via undersized weight rank","id":"CVE-2026-115920","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"PyPI","product":null,"products":[],"type":null,"year":"2026"},"n_packages":2,"n_references":4,"next":{"headline":"ONNX: Null Pointer Dereference in ScanInferenceFunction Due to Missing Required Attribute","id":"CVE-2026-115921"},"packages":[{"ecosystem":"PyPI","fixed":["1.22.0"],"introduced":["1.2.1"],"last_affected":[],"package":"onnx","purl":null,"source":"GHSA-6pwm-x34p-fvj2"},{"ecosystem":"PyPI","fixed":["1.22.0"],"introduced":["1.2.1"],"last_affected":[],"package":"onnx","purl":"pkg:pypi/onnx","source":"GHSA-6pwm-x34p-fvj2"}],"prev":{"headline":"ONNX: Out-of-Bounds Read in RNN/GRU/LSTM Shape Inference (Old Opsets, Missing Rank Check)","id":"CVE-2026-115919"},"products":["onnx"],"published":"2026-10-26","related":[],"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":"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":"2026-10-26","vendors":["onnx"]},"summary":null,"url":"https://insights.sbomify.com/CVE-2026-115920/"}