SSRF in Open-Webui
CVE-2026-87996
Open WebUI is an extensible, feature-rich, and user-friendly self-hosted AI platform. From 0.9.6 until 0.11.1, SafePlaywrightURLLoader in backend/open_webui/retrieval/web/utils.py validated a user-controlled hostname in Python and then let the Playwright browser resolve it again in the sync and async request interceptors. An authenticated user controlling authoritative DNS could return a public address to validation and an internal address to the browser, exposing responses from internal services or cloud metadata through web search or URL ingestion. This issue is fixed in version 0.11.1.
Vulnerability class: TOCTOU (Time-of-Check to Time-of-Use)
CVSS v3 metric
CVSS v3 base score 7.7 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N.
Affected products
- Open-webui — versions >= 0.9.6, < 0.11.1
Weakness classification (CWE)
References
- security-advisories@github.com (x_refsource_CONFIRM)
- security-advisories@github.com (x_refsource_MISC)
- security-advisories@github.com (x_refsource_MISC)
- security-advisories@github.com (x_refsource_MISC)
Frequently asked questions
- What is CVE-2026-87996?
- CVE-2026-87996 is a high-severity vulnerability in Open-Webui, classified under Time-of-check Time-of-use (TOCTOU) Race Condition. CVSS score: 7.7/10. Published 2026-09-09.
- How severe is CVE-2026-87996?
- High severity. CVSS v3 base score is 7.7 out of 10.