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CVE-2026-34446

22
FAUCET Score

CVE-2026-34446 identifies a path traversal vulnerability in Open Neural Network Exchange (ONNX) versions prior to 1.21.0, specifically within the `onnx.load` function, which incorrectly handles hardlinks and could allow access to arbitrary files. Rated as Medium severity with a CVSS score of 4.7, exploitation requires local access and user interaction, but could result in high confidentiality impact through sensitive file disclosure. Currently, there is no evidence of active exploitation, public exploit code, or significant community attention, with its EPSS score indicating a very low probability of exploitation.

Impacted Technologies

VendorProductVersion(s)CPE
< 1.21.0CPE matchmatch criteria
cpe:2.3:a:linuxfoundation:onnx:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

4.7MEDIUM

CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:H/I:N/A:N

Attack Vector
LOCAL
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
NONE
Availability Impact
NONE
Exploitability Score
1.0
Impact Score
3.6
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.18%
Probability of exploitation in next 30 days
EPSS Percentile
7.4%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0018 is in the 9th percentile among its peer group of 5,760 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.0 Bluesky, 0.0 Mastodon, and 0.1 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (3)

microsoftpatch availablevia msrc
Product: azl3 pytorch 2.2.2-12 on Azure Linux 3.0Fixed in: 2.2.2-14
microsoftpatch availablevia msrc
Product: 20972-17084Fixed in: 2.2.2-14
pippatch availablevia ghsa
Product: onnxFixed in: 1.21.0

Vendor Advisories (2)

microsoft2026-Apr/CVE-2026-34446Moderate

ONNX: Arbitrary File Read via ExternalData Hardlink Bypass in ONNX load

Apr 2, 2026
pipGHSA-cmw6-hcpp-c6jpmedium

ONNX: Arbitrary File Read via ExternalData Hardlink Bypass in ONNX load

Apr 1, 2026

References

github.com / onnx/onnx/commit/4755f8053928dce18a61db8fec71b69c74f786cb
Patch
github.com / onnx/onnx/security/advisories/GHSA-cmw6-hcpp-c6jp
Vendor Advisory