Time-of-check Time-of-use (TOCTOU) Race Condition

Overview onnx is an Open Neural Network Exchange Affected versions of this package are vulnerable to Time-of-check Time-of-use TOCTOU Race Condition through the saveexternaldata function. An attacker can overwrite arbitrary files or inject data into sensitive locations by exploiting a race...

ONNX: TOCTOU arbitrary file read/write in save_external_dat

Summary The saveexternaldata method seems to include multiple issues introducing a local TOCTOU vulnerability, an arbitrary file read/write on any system. It potentially includes a path validation bypass on Windows systems. Regarding the TOCTOU, an attacker seems to be able to overwrite victim's...

PT-2026-79395

Name of the Vulnerable Software and Affected Versions ONNX versions prior to 1.21.0 Description The save external data function constructs an external-data file path using the external data location field and opens it for writing without using O NOFOLLOW or O EXCL flags, following a non-atomic...

Directory Traversal

Overview onnx is an Open Neural Network Exchange Affected versions of this package are vulnerable to Directory Traversal via the saveexternaldata function. An attacker can overwrite arbitrary files by supplying crafted values to the externaldata.location parameter containing traversal sequences,...

UBUNTU-CVE-2025-51480

Path Traversal vulnerability in onnx.externaldatahelper.saveexternaldata in ONNX 1.17.0 allows attackers to overwrite arbitrary files by supplying crafted externaldata.location paths containing traversal sequences, bypassing intended directory restrictions...

CVE-2025-51480

Path Traversal vulnerability in onnx.externaldatahelper.saveexternaldata in ONNX 1.17.0 allows attackers to overwrite arbitrary files by supplying crafted externaldata.location paths containing traversal sequences, bypassing intended directory restrictions...