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CVE-2026-34445

Open Neural Network Exchange (ONNX) is an open standard for machine learning interoperability. Prior to version 1.21.0, the ExternalDataInfo class in ONNX was using Python’s setattr() function to load metadata (like file paths or data lengths) directly from an ONNX model file. It didn’t check if the "keys" in the file were valid. Due to this, an attacker could craft a malicious model that overwrites internal object properties. This issue has been patched in version 1.21.0.
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:14f06061be3cbe4da3db1aee4f651f0c97162418265bea2ff945159874a631ef
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
1

Preserved source conflicts

No provider value was silently selected as the winner.

cwe · 3 assertions

{"cweId":"CWE-20","description":"CWE-20: Improper Input Validation","lang":"en","type":"CWE"}

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:a1b787a0232cd58e056a62002f9fa0bb19d8b0e2b67788fec6da4f88ceb336d1 · sha256:47a2f4b802a712a0… · /containers/cna/problemTypes/0/descriptions/0

{"cweId":"CWE-915","description":"CWE-915: Improperly Controlled Modification of Dynamically-Determined Object Attributes","lang":"en","type":"CWE"}

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:a1b787a0232cd58e056a62002f9fa0bb19d8b0e2b67788fec6da4f88ceb336d1 · sha256:47a2f4b802a712a0… · /containers/cna/problemTypes/2/descriptions/0

{"cweId":"CWE-400","description":"CWE-400: Uncontrolled Resource Consumption","lang":"en","type":"CWE"}

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:a1b787a0232cd58e056a62002f9fa0bb19d8b0e2b67788fec6da4f88ceb336d1 · sha256:47a2f4b802a712a0… · /containers/cna/problemTypes/1/descriptions/0

Affected products and versions

1 source assertion
{"product":"onnx","vendor":"onnx","versions":[{"status":"affected","version":"< 1.21.0"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:a1b787a0232cd58e056a62002f9fa0bb19d8b0e2b67788fec6da4f88ceb336d1 · sha256:47a2f4b802a712a0… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion
{"metric":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"HIGH","baseScore":8.6,"baseSeverity":"HIGH","confidentialityImpact":"LOW","integrityImpact":"LOW","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H","version":"3.1"},"metric_type":"cvssV3_1"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:a1b787a0232cd58e056a62002f9fa0bb19d8b0e2b67788fec6da4f88ceb336d1 · sha256:47a2f4b802a712a0… · /containers/cna/metrics/0/cvssV3_1

CWE assertions

3 source assertions
{"cweId":"CWE-20","description":"CWE-20: Improper Input Validation","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:a1b787a0232cd58e056a62002f9fa0bb19d8b0e2b67788fec6da4f88ceb336d1 · sha256:47a2f4b802a712a0… · /containers/cna/problemTypes/0/descriptions/0
{"cweId":"CWE-915","description":"CWE-915: Improperly Controlled Modification of Dynamically-Determined Object Attributes","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:a1b787a0232cd58e056a62002f9fa0bb19d8b0e2b67788fec6da4f88ceb336d1 · sha256:47a2f4b802a712a0… · /containers/cna/problemTypes/2/descriptions/0
{"cweId":"CWE-400","description":"CWE-400: Uncontrolled Resource Consumption","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:a1b787a0232cd58e056a62002f9fa0bb19d8b0e2b67788fec6da4f88ceb336d1 · sha256:47a2f4b802a712a0… · /containers/cna/problemTypes/1/descriptions/0

Source references

3 source assertions
{"name":"https://github.com/onnx/onnx/commit/e30c6935d67cc3eca2fa284e37248e7c0036c46b","tags":["x_refsource_MISC"],"url":"https://github.com/onnx/onnx/commit/e30c6935d67cc3eca2fa284e37248e7c0036c46b"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:a1b787a0232cd58e056a62002f9fa0bb19d8b0e2b67788fec6da4f88ceb336d1 · sha256:47a2f4b802a712a0… · /containers/cna/references/2
{"name":"https://github.com/onnx/onnx/pull/7751","tags":["x_refsource_MISC"],"url":"https://github.com/onnx/onnx/pull/7751"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:a1b787a0232cd58e056a62002f9fa0bb19d8b0e2b67788fec6da4f88ceb336d1 · sha256:47a2f4b802a712a0… · /containers/cna/references/1
{"name":"https://github.com/onnx/onnx/security/advisories/GHSA-538c-55jv-c5g9","tags":["x_refsource_CONFIRM"],"url":"https://github.com/onnx/onnx/security/advisories/GHSA-538c-55jv-c5g9"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:a1b787a0232cd58e056a62002f9fa0bb19d8b0e2b67788fec6da4f88ceb336d1 · sha256:47a2f4b802a712a0… · /containers/cna/references/0

Attribution and limitations

  • CVE Program CVEList V5: Reproduce the MITRE copyright designation and CVE license in copies. Source →

Provider severity values are preserved separately. Baitaphish does not convert them into a risk rating, infer affected products, or treat EPSS as observed exploitation.

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