Machine-written summary
Summary written by Claude Haiku from the source advisory. Not reviewed by a person.
Open WebUI versions before 0.9.6 are vulnerable to path traversal in the terminal server reverse proxy, where the user-supplied path is not fully confined before being forwarded to an admin-configured terminal server. An authenticated non-admin user who has been granted access to a terminal server can use encoded traversal sequences, including a double-encoded bypass of the path sanitizer, to reach unintended endpoints and files on that server and possibly internal services it routes to. Upgrade to Open WebUI 0.9.6 or later.
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 |
|---|---|---|---|---|
| 7.7 | High | 3.1 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N | CNA (GitHub_M) |
- CISA KEV Not listed.
- EPSS 0.0042, the 36th percentile, on 13 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.
Timeline
- 31 Oct 2026, 14:42 UTC First seen by agentprime
- 31 Oct 2026, 14:42 UTC Confirmed by OSV
Sources
- GitHub Advisory Database: GHSA-r2wg-2mcr-66rv
- OSV: GHSA-r2wg-2mcr-66rv
- github.com/open-webui/open-webui/security/advisories/GHSA-r2wg-2mcr-66rv
- nvd.nist.gov/vuln/detail/CVE-2026-54017
- github.com/open-webui/open-webui
- github.com/pypa/advisory-database/tree/main/vulns/open-webui/PYSEC-2026-2751.yaml
- pypi.org/project/open-webui