Machine-written summary
Summary written by Claude Haiku from the source advisory. Not reviewed by a person.
The onnx package before 1.21.0 is affected. Its load function checks for symlinks when resolving external data paths but does not detect hardlinks, so a crafted model file could make it read arbitrary files on the victim's machine, such as local secrets, if a user loads that model. The source gives few details about the exact attack steps. Upgrade to onnx 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 |
|---|---|---|---|---|
| 4.7 | Medium | 3.1 | CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:H/I:N/A:N | CNA (GitHub_M) |
- CISA KEV Not listed.
- EPSS 0.0018, the 7th percentile, on 6 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.
Timeline
- 31 Oct 2026, 14:34 UTC First seen by agentprime
- 31 Oct 2026, 14:34 UTC Confirmed by OSV