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Advisory record · GHSA-frvj-c5qp-xj4w

open-webui terminal proxy path traversal guard bypass via 9x encoded traversal

CVSS 7.7 HighEPSS 0.0048 · 42nd percentile

Published by the GitHub Advisory Database at 24 Jul 2026, 21:05 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

PackageEcosystemAffectedFixed in
open-webuiPyPI>=0.9.6, <0.10.00.10.0
Identifiers
GHSA-frvj-c5qp-xj4w · CVE-2026-59221 · PYSEC-2026-3597
Weakness (CWE)
CWE-22 · CWE-918
Tags
Published
24 Jul 2026
Updated
4 Aug 2026

Machine-written summary

Summary written by Claude Haiku from the source advisory. Not reviewed by a person.

Open WebUI (PyPI package open-webui) versions 0.9.6 up to but not including 0.10.0 are affected. A user with normal access to an admin-configured terminal connection can send a multiply percent-encoded path that bypasses the terminal proxy path traversal check, causing requests to be forwarded with the configured terminal credentials to paths outside the intended proxy path. Upgrade to open-webui 0.10.0 or later.

Written 5 Nov 2026.

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

ScoreRatingCVSSVectorSource
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 0.0048, the 42nd percentile, on 12 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

  1. 31 Oct 2026, 14:41 UTC First seen by agentprime
  2. 31 Oct 2026, 14:41 UTC Confirmed by OSV

Sources

Facts on this page come from the GitHub Advisory Database (CC-BY 4.0), OSV and the other sources listed, as published. We don’t reproduce full advisory descriptions, which can contain exploit code.