Machine-written summary
Summary written by Claude Haiku from the source advisory. Not reviewed by a person.
The transformers library, affected before version 5.3.0, can be made to run attacker-supplied Python code. A malicious config.json that sets an internal attention field to an attacker-controlled Hugging Face Hub repository ID causes the library to download and execute code from that repository when a victim loads the model with the standard from_pretrained() call, even without trust_remote_code enabled. Upgrade to transformers 5.3.0 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 |
|---|---|---|---|---|
| 7.8 | High | 3.0 | CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H | CNA (@huntr_ai) |
- CISA KEV Not listed.
- EPSS 0.0070, the 53rd percentile, on 10 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