CVE-2026-82640: browser-use web-ui 2.0.0 through 3.0.0 Cleartext API Key Storage

Severity: medium (CVSS 5.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.1% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-08-30 · updated 2026-09-10
Weakness: CWE-312

Description

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.

Affected products

browser-use web-ui: from 2.0.0 through 3.0.0

References

https://github.com/browser-use/web-ui
https://github.com/browser-use/web-ui/blob/v3.0.0/src/webui/webui_manager.py
https://github.com/browser-use/web-ui/issues/736
https://www.vulncheck.com/advisories/browser-use-web-ui-2.0.0-through-3.0.0-cleartext-api-key-storage

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