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Advisory record · GHSA-4v7r-f4w8-8972

Open WebUI has a full SSRF Vulnerability in the RAG Web Search Feature

CVSS 8.5 HighEPSS 0.0029 · 21st percentile

Published by the GitHub Advisory Database at 14 May 2026, 20:18 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

PackageEcosystemAffectedFixed in
open-webuiPyPI<0.9.00.9.0
Identifiers
GHSA-4v7r-f4w8-8972 · CVE-2026-45331 · PYSEC-2026-2702
Weakness (CWE)
CWE-918
Tags
Published
14 May 2026
Updated
13 Jul 2026

Machine-written summary

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

Open WebUI versions before 0.9.0 are affected. The URL validation used for web search and other server-side fetches fails to block IPv6 addresses, IPv4-mapped IPv6 addresses, and several reserved IPv4 ranges. An authenticated user can make the server send requests to internal addresses, such as cloud metadata services or localhost-bound APIs, which may expose credentials. Upgrade to Open WebUI 0.9.0 or later. The source gives no workaround.

Written 6 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
8.5 High 3.1 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:L/A:N CNA (GitHub_M)
  • CISA KEV Not listed.
  • EPSS 0.0029, the 21st percentile, on 14 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

  1. 15 May 2026, 20:16 UTC Confirmed by NVD
  2. 31 Oct 2026, 15:03 UTC First seen by agentprime
  3. 31 Oct 2026, 15:03 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.