Machine-written summary
Summary written by Claude Haiku from the source advisory. Not reviewed by a person.
The ouroboros-ai package before 0.39.0 loads a `.env` file from the current working directory, and accepts execution-affecting variables such as the CLI path settings from it. An attacker who gets a user to clone a malicious repository and run Ouroboros commands inside it can cause arbitrary code to run on the user's system. Upgrade to ouroboros-ai 0.39.0 or later, which blocks these variables from project-local `.env` files. Until then, inspect any `.env` file in cloned repositories for unexpected CLI path overrides before running commands.
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 |
|---|---|---|---|---|
| 8.4 | High | 4.0 | CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N | CNA (GitHub_M) |
- CISA KEV Not listed.
- EPSS 0.0019, the 8th percentile, on 5 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.
Timeline
- 31 Oct 2026, 14:29 UTC First seen by agentprime
- 31 Oct 2026, 14:29 UTC Confirmed by OSV