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TI-2026-80525 Aliases CVE-2026-115920GHSA-6pwm-x34p-fvj2

Out-of-bounds read in ONNX ConvTranspose shape inference

Priority LOW 27CWE-125Published · Updated

Key facts

Attack vector
Local
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
Denial of service
Confidentiality · integrity · availability
None · None · High
Fix status
Partial Red Hat: 1 without a fix

Attack profile from CVSS 3.1 · CNA. Fix status from CNA, GitHub and Red Hat. Impact type from CWE-125 and the CVSS impact.

Summary

ONNX, an open standard for machine learning interoperability, is affected from 1.2.1 before 1.22.0. ConvTranspose shape inference reads past the end of an empty kernel shape when a weight tensor has fewer than three dimensions and no kernel_shape attribute is set, which is an out-of-bounds read (CWE-125). An untrusted model that passes onnx.checker.check_model() can crash onnx.shape_inference.infer_shapes(), causing denial of service by an attacker who can supply a model.

Written with Claude Haiku 5.5 from the sources below · 2026-10-28

Description from the CNA

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00178 7th percentileScored 2026-11-07
Fix Partial onnx (onnx): 1.22.0onnx (PyPI): 1.22.0Red Hat: 1 without a fix

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
onnxonnx1.2.1 to before 1.22.01.22.0Patch availableCNA
—onnx (PyPI)1.2.1 to before 1.22.01.22.0Patch availableGHSA-6pwm-x34p-fvj2
  • onnx Vendoronnx Affected 1.2.1 to before 1.22.0 Fixed in 1.22.0 Patch available CNA
  • onnx (PyPI) Vendor— Affected 1.2.1 to before 1.22.0 Fixed in 1.22.0 Patch available GHSA-6pwm-x34p-fvj2

CPE names Threatist (inferred) · 1

Inferred from how NVD named this product before; not given by a source.

CPEVersionsRoleVendor
cpe:2.3:a:linuxfoundation:onnx:*:*:*:*:*:*:*:*——backstage
  • cpe:2.3:a:linuxfoundation:onnx:*:*:*:*:*:*:*:* Versions — — ·backstage

Remediation

Upgrade the PyPI package onnx to version 1.22.0. The sources list no fixed version for Red Hat OpenShift AI (RHOAI).

Written with Claude Haiku 5.5 from the sources below · 2026-10-28

  • Fix · CNA onnx (onnx) Fixed in 1.22.0
  • Fix · GHSA-6pwm-x34p-fvj2 onnx (PyPI) Fixed in 1.22.0 Advisory →

Vendor assessments

Red Hat

Red Hat rating: Moderate. Red Hat's page for this CVE →

ProductStatusPlan or fix
Red Hat OpenShift AI (RHOAI)AffectedNo fix yet: Fix deferred

Timeline

  1. 2026-10-26 Threatist record created from CVE-2026-115920
  2. 2026-10-26 CISA SSVC decision points changed
  3. 2026-10-26 Priority changed: MEDIUM → LOW
  4. 2026-10-27 Affected versions changed · Red Hat
  5. 2026-10-27 CVSS score added · Red Hat
  6. 2026-10-28 Alias added: GHSA-6pwm-x34p-fvj2
  7. 2026-10-28 Fix available: PyPI/[email protected] · GHSA-6pwm-x34p-fvj2
  8. 2026-10-28 CVSS score added · GHSA-6pwm-x34p-fvj2
  9. 2026-10-28 Weakness changed · GHSA-6pwm-x34p-fvj2
  10. 2026-10-28 6 new references · GHSA-6pwm-x34p-fvj2

References

Advisory 1

Other 5

  • TI-2026-22763 ONNX Untrusted Model Repository Warnings Suppressed by silent=True in onnx.hub.load() — Silent Supply-Chain Attack CVSS 3.1CRITICAL 9.1
  • TI-2026-21896 ONNX: Path Traversal via Symlink CVSS 4.0HIGH 8.7
  • TI-2024-07209 Arbitrary File Overwrite in onnx/onnx CVSS 3.1CRITICAL 9.1
  • TI-2024-04814 Arbitrary File Overwrite in download_model_with_test_data in onnx/onnx CVSS 3.1HIGH 8.8
  • TI-2026-36338 ONNX symlink-following and path-traversal arbitrary file write CVSS 4.0MEDIUM 6.8
  • TI-2026-32442 ONNX: Null Pointer Dereference in Upsample Version Converter Adapter (Zero Inputs) CVSS 3.1MEDIUM 5.5
See all 16 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences