{"id":"CVE-2026-115920","published":"2026-10-26T18:17:39.800","lastModified":"2026-10-26T20:17:52.137","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.","cvssScore":6.2,"cvssSeverity":"MEDIUM","cvssVector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","cwes":["CWE-125"],"vendors":[],"products":[],"references":[{"url":"https://github.com/onnx/onnx/commit/2ec288908952eea9dcf48d4b197915e1f72c6abf","tags":[]},{"url":"https://github.com/onnx/onnx/pull/7997","tags":[]},{"url":"https://github.com/onnx/onnx/releases/tag/v1.22.0","tags":[]},{"url":"https://github.com/onnx/onnx/security/advisories/GHSA-6pwm-x34p-fvj2","tags":[]}],"exploitRefs":[{"url":"https://github.com/onnx/onnx/commit/2ec288908952eea9dcf48d4b197915e1f72c6abf","tags":[]},{"url":"https://github.com/onnx/onnx/pull/7997","tags":[]},{"url":"https://github.com/onnx/onnx/releases/tag/v1.22.0","tags":[]},{"url":"https://github.com/onnx/onnx/security/advisories/GHSA-6pwm-x34p-fvj2","tags":[]}],"hasPoc":true,"ai":null}