Vulnerability in Browser-Use Web-Ui
CVE-2026-82640
browser-use web-ui versions 2.0.0 through 3.0.0 write configured LLM API keys to disk in cleartext without encryption or access restrictions. Attackers with read access to the temporary settings directory can recover provider API keys from predictably-named JSON files.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.5 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N.
EPSS exploit prediction
EPSS: 0.001 (0.1th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 0th percentile — 0.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.001 · newest: 0.001 · change: +0.000
Affected products
Weakness classification (CWE)
References
- GitHub Issue #736 (issue-tracking)
- github.com/browser-use/web-ui (product)
- github.com/browser-use/web-ui/blob/v3.0.0/src/webui/webui_manager.py (technical-description)
- VulnCheck Advisory: browser-use web-ui 2.0.0 through 3.0.0 Cleartext API Key Storage (third-party-advisory)
Frequently asked questions
- What is CVE-2026-82640?
- CVE-2026-82640 is a medium-severity vulnerability in Browser-Use Web-Ui, classified under Cleartext Storage of Sensitive Information. CVSS score: 5.5/10. Published 2026-08-30.
- How severe is CVE-2026-82640?
- Medium severity. CVSS v3 base score is 5.5 out of 10.