CVE-2026-34447: linuxfoundation onnx Path Traversal
CVSS: 5.5v3.1MediumAnalyzed
AliasesGHSA-p433-9wv8-28xjPYSEC-2026-104UBUNTU-CVE-2026-34447DEBIAN-CVE-2026-34447CGA-4c3x-7fvp-xjhfCGA-4jj3-p8mp-9642CGA-7r79-p3m7-x73cCGA-cm65-xffj-j35hCGA-gc8j-p2v5-fjx9CGA-h8hh-862p-r85pCGA-mqmw-wxhf-g25pCGA-w75g-8pf2-vx7q
Published 01-04-2026Last modified 01-04-2026
Vulnerability summary
CVE-2026-34447 is a medium (CVSS 5.5) Path Traversal vulnerability in linuxfoundation onnx. EPSS estimates a 0.19% chance of exploitation in the next 30 days, higher than 8.2% of scored vulnerabilities. 1 public exploit is recorded.
CVSS score
5.5/10
010
Medium · v3.1 (CVE.org)EPSS score
0.19%
0%100%
Low · -0.06 pp in 30 daysKEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits1github
Advisory lineage
Upstream 0 · Downstream 0 · Related 1Timeline
- 01-04-2026PublishedVulnerability first disclosed.
- 01-04-2026Last modifiedVulnerability information updated.
Description
Open Neural Network Exchange (ONNX) is an open standard for machine learning interoperability. Prior to version 1.21.0, there is a symlink traversal vulnerability in external data loading allows reading files outside the model directory. This issue has been patched in version 1.21.0.
CVSS metrics
6 scores · 6 sources · 1 versionMedium 5.5Preferred score · CVE.org (CNA)
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:NSourcesAll 6 agree
- OSV · PypiEcosystem advisory · calculated5.5MediumCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N
- OSV · UbuntuEcosystem advisory · calculated5.5MediumCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N
- OSV · DebianEcosystem advisory · calculated5.5MediumCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N
- OSV · ChainguardEcosystem advisory · calculated5.5MediumCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N
- NVDNIST5.5MediumCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N
EPSS trend
Probability
0.19%
Chance of exploitation in the next 30 days
Percentile
8%
Versus all other CVEs
30-day change
-0.06 pp
From 0.25% on 19-09-2026
19-09-202619-10-2026
EPSS score0.19%
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
1 foundOnnx
Maturity: poc
Weaknesses
CWE · root cause- CWE-22Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')The product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory.
- CWE-61UNIX Symbolic Link (Symlink) FollowingThe product, when opening a file or directory, does not sufficiently account for when the file is a symbolic link that resolves to a target outside of the intended control sphere. This could allow an attacker to cause the product to operate on unauthorized files.
Affected systems
Chainguard4 products
- py3.10-onnx< 1.21.0-r0
- py3.11-onnx< 1.21.0-r0
- py3.12-onnx< 1.21.0-r0
- py3.13-onnx< 1.21.0-r0
Debian1 product
- onnxAll versions (No fix recorded)
Linuxfoundation1 product
- onnx< 1.21.0
Onnx1 product
- onnx< 1.21.0
PyPI1 product
- onnx< 1.21.0
Ubuntu1 product
- onnxAll versions (No fix recorded)
6 vendors · 9 products
References
8 links- github.com/onnx/onnx/security/advisories/GHSA-p433-9wv8-28xjX Refsource CONFIRMWEBEVIDENCEAdvisoryExploitVendor Advisory
- github.com/onnx/onnxPACKAGE
