Machine-written summary
Summary written by Claude Haiku from the source advisory. Not reviewed by a person.
The onnx package before 1.21.0 has a path traversal flaw: its symlink check for external model data does not detect symbolic links, so a model's external data file can point to an arbitrary file on the system. An attacker who supplies a crafted model archive with a symlink could cause the victim's system to read sensitive files when the model is loaded. Upgrade onnx to version 1.21.0 or later.
Not analysed yet
We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.
Severity and exploitation
| Score | Rating | CVSS | Vector | Source |
|---|---|---|---|---|
| 8.7 | High | 4.0 | CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N | CNA (GitHub_M) |
- CISA KEV Not listed.
- EPSS 0.0062, the 49th percentile, on 7 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.
Timeline
- 31 Mar 2026, 22:34 UTC Confirmed by GitHub Advisory Database
- 31 Oct 2026, 15:04 UTC First seen by agentprime
- 31 Oct 2026, 15:04 UTC Confirmed by OSV