Machine-written summary
Summary written by Claude Haiku from the source advisory. Not reviewed by a person.
mlflow versions before 3.4.0rc0 create temporary directories used for Python virtual environments with world-writable permissions (0o777). An attacker who can write to the /tmp directory on the same system could exploit a race condition to overwrite .py files in the virtual environment and run arbitrary code. Upgrade mlflow to 3.4.0rc0 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 |
|---|---|---|---|---|
| 7.0 | High | 3.0 | CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H | CNA (@huntr_ai) |
- CISA KEV Not listed.
- EPSS 0.0024, the 15th 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