CVE-2026-115922

Open Neural Network Exchange (ONNX) is an open standard for machine learning interoperability. Prior to 1.22.0, _unpack_2bit() and _unpack_4bit() resize unpacked arrays according to attacker-controlled TensorProto.dims without verifying that raw_data or int32_data encodes the declared number of elements. Materializing an untrusted UINT2, INT2, UINT4, INT4, or FLOAT4E2M1 tensor through onnx.numpy_helper.to_array() or onnx.reference.ReferenceEvaluator can therefore expand a small packed payload into a disproportionately large allocation and exhaust memory. This issue is fixed in version 1.22.0.

• CWE-789

• https://github.com/onnx/onnx/commit/05c1bc3bceceb8d3cf11e9e7fc7f19f971c44988
• https://github.com/onnx/onnx/commit/8de2cf6aa47928e6515ac6d9e1a8b4758886a7df
• https://github.com/onnx/onnx/commit/dce5876d6cc6cc30157af7d26a752ef44976da8e
• https://github.com/onnx/onnx/pull/8033
• https://github.com/onnx/onnx/pull/8038
• https://github.com/onnx/onnx/pull/8066
• https://github.com/onnx/onnx/releases/tag/v1.22.0
• https://github.com/onnx/onnx/security/advisories/GHSA-q69g-f4f5-v8m7

Published

Oct 26, 2026

Last Modified

Oct 26, 2026

Status

Awaiting Analysis

• How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
• Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
• PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
• AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.

• CVE-2026-115917vLLM is an inference and serving engine for large language m…3.4
• CVE-2026-115918vLLM is an inference and serving engine for large language m…6.5
• CVE-2026-115919Open Neural Network Exchange (ONNX) is an open standard for …6.2
• CVE-2026-11592The Email Subscribers & Newsletters – Email Marketing, Post …4.3
• CVE-2026-115920Open Neural Network Exchange (ONNX) is an open standard for …6.2
• CVE-2026-115921Open Neural Network Exchange (ONNX) is an open standard for …6.2
• CVE-2026-115923Backstage is an open framework for building developer portal…6.5
• CVE-2026-115929MongoDB Compass relies on Electron, a third-party runtime th…6.8
• CVE-2026-115930The MongoDB Shell (mongosh) relies on Node.js as a third-par…6.8
• CVE-2026-115931Postiz lets a signed-in user ask the backend to run a functi…9.9
• CVE-2026-115932When a post is published, Postiz treats a media path that is…9.6
• CVE-2026-115933Postiz signs its session, invitation and password reset toke…9.9