Machine-written summary
Summary written by Claude Haiku from the source advisory. Not reviewed by a person.
Crawl4AI versions before 0.9.0 accept a request-supplied browser_config.extra_args in the Docker API, which passes values into Chromium launch arguments. An unauthenticated attacker who can reach the API can inject Chromium switches that make Chromium run an attacker-chosen command as the container's runtime user. Upgrade crawl4ai to 0.9.0, which rejects requests that set extra_args; enabling the CRAWL4AI_API_TOKEN authentication and restricting network access to the API also help.
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 |
|---|---|---|---|---|
| 10.0 | Critical | 3.1 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H | CNA (GitHub_M) |
- CISA KEV Not listed.
- EPSS 0.0094, the 61st percentile, on 14 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.
Timeline
- 31 Oct 2026, 15:04 UTC First seen by agentprime
- 31 Oct 2026, 15:04 UTC Confirmed by OSV