Buffer overflow in Onnx
CVE-2026-14647
A weakness has been identified in onnx up to 1.21.x. This vulnerability affects the function convPoolShapeInference_opset19 of the file onnx/defs/nn/old.cc of the component onnxruntime. This manipulation causes out-of-bounds read. It is possible to initiate the attack remotely. The exploit has been made available to the public and could be used for attacks. Patch name: a7bf3a0f1d18bb62575236ef6e4944980c40e045. It is recommended to apply a patch to fix this issue.
Vulnerability class: Buffer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 4.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N.
EPSS exploit prediction
EPSS: 0.004 (35.0th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 35th percentile — 35.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.004 · newest: 0.004 · change: 0.000
Affected products
- Onnx — versions 1.0, 1.1, 1.2
Weakness classification (CWE)
References
- github.com/onnx/onnx/ (product)
- github.com/onnx/onnx/commit/a7bf3a0f1d18bb62575236ef6e4944980c40e045 (patch)
- github.com/onnx/onnx/issues/8036 (issue-tracking, exploit)
- github.com/onnx/onnx/pull/8051 (issue-tracking, patch)
- vuldb.com/cve/CVE-2026-14647 (third-party-advisory)
- vuldb.com/submit/846317 (third-party-advisory)
- vuldb.com/vuln/376160 (technical-description, vdb-entry)
- vuldb.com/vuln/376160/cti (signature, permissions-required)
Frequently asked questions
- What is CVE-2026-14647?
- CVE-2026-14647 is a medium-severity vulnerability in Onnx, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. CVSS score: 4.3/10. Published 2026-07-04.
- How severe is CVE-2026-14647?
- Medium severity. CVSS v3 base score is 4.3 out of 10.