# Open WebUI: \`WEB_FETCH_FILTER_LIST\` host allow/block filter bypassable via URL path and non-label-boundary matching

Advisory record · `GHSA-qg3f-8x3j-ggf2`

- **Identifiers:** `GHSA-qg3f-8x3j-ggf2` · `CVE-2026-59223` · `PYSEC-2026-3603`
- **State:** Confirmed
- **Severity:** CVSS 4.3 Medium
- **Critical:** No
- **Weakness (CWE):** [CWE-693](https://cwe.mitre.org/data/definitions/693.html)
- **Tags:** [CWE-693](https://agentprime.io/advisories/tag/cwe-693.md)
- **Published:** 24 Jul 2026
- **Updated:** 4 Aug 2026
- **Reviewed by a person:** No

Published by the GitHub Advisory Database at 24 Jul 2026, 20:49 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

## Affected packages

- `open-webui` (PyPI): affected `<0.10.0`; fixed in `0.10.0`

## 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

- 4.3 Medium, CVSS 3.1: `CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N`, from CNA (GitHub_M)

- **CISA KEV:** Not listed.
- **EPSS:** 0.0038, the 32nd percentile, on 9 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

## Timeline

- 31 Oct 2026, 14:41 UTC: First seen by agentprime
- 31 Oct 2026, 14:41 UTC: [Confirmed by OSV](https://osv.dev/vulnerability/GHSA-qg3f-8x3j-ggf2)

## Sources

- [GitHub Advisory Database: GHSA-qg3f-8x3j-ggf2](https://github.com/advisories/GHSA-qg3f-8x3j-ggf2)
- [OSV: GHSA-qg3f-8x3j-ggf2](https://osv.dev/vulnerability/GHSA-qg3f-8x3j-ggf2)
- <https://github.com/open-webui/open-webui/security/advisories/GHSA-qg3f-8x3j-ggf2>
- <https://nvd.nist.gov/vuln/detail/CVE-2026-59223>
- <https://github.com/open-webui/open-webui/pull/25949>
- <https://github.com/open-webui/open-webui/commit/087878ce848a4d828012068b5997dac480f43656>
- <https://github.com/open-webui/open-webui>
- <https://github.com/open-webui/open-webui/releases/tag/v0.10.0>

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.

## Check whether this affects you

A Match means an installed version is in the affected range above. Most don’t affect the app; agentprime hasn’t analysed this one yet.

- With the agentprime MCP server (<https://api.agentprime.io/mcp>), ask your agent to check the project: `check_lockfile` sends a lockfile, `check_packages` a list of installed packages, and both return the Matches and the upgrades that clear them. `get_advisory` returns this record. Setup: <https://agentprime.io/mcp.md>
- In a browser: <https://agentprime.io/check/> reads your lockfile in the browser, never uploading it.
- Whether it touches your code, with file and line: the Claude Code plugin, <https://agentprime.io/plugin.md>
- As JSON: <https://api.agentprime.io/v1/advisories/GHSA-qg3f-8x3j-ggf2>, or `POST https://api.agentprime.io/v1/match` with your packages (<https://agentprime.io/api.md>)

---

The web page: <https://agentprime.io/advisories/GHSA-qg3f-8x3j-ggf2/>. Everything for agents: <https://agentprime.io/llms.txt>.