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archive/Patch now/AIR-2026-1140
closedclosed 30 Jun 2026Patch now2 Disclosed vulnerabilityAI

CVE-2026-56399: Open WebUI contains a server-side request forgery vulnerability in retrieval endpoint

Open WebUI

Open WebUI before version 0.6.27 has a server-side request forgery vulnerability in its web retrieval processing endpoint, permitting authenticated users to access internal services. A vendor update resolves the security issue.

disclosed CVENo confirmed exploitation, so this record is tracked as a disclosed vulnerability and not counted as an incident. It moves into the counts if CISA or the vendor confirms exploitation. Why

CVSS
5.3
EPSS
<0.01 · top 61% · 2026-11-13
EPSS scores by FIRST
fix status
Fix status unknown
first report
30 Jun 2026
last update
30 Jun 2026
CVE ids
CVE-2026-56399other records

Timeline · 1

  1. 30 Jun 2026CVE-2026-56399: Open WebUI before 0.6.27 contains a server-side request forgery vulnerability in the /api/v1/retrieval/process/web endpoint that…

Sources · 1

Advisories and databases

  1. 2026-06-30
    CVE-2026-56399: Open WebUI before 0.6.27 contains a server-side request forgery vulnerability in the /api/v1/retrieval/process/web endpoint that…
    NVD · nvd.nist.gov/vuln/detail/CVE-2026-56399

Titles and links belong to their publishers. The summary above is written by gcdRadar in its own words; data is CC BY-SA 4.0.

Classification

lane
Patch now
AI role
Attack on AI
categories
Infrastructure vulnerability
severity
2 · Disclosed vulnerability
fix status
Fix status unknown
targets
Framework / tooling
owasp llm top 10
LLM03:2025 Supply Chain
mitre atlas
no technique for these categories
tags
open-webuissrf
dates
happened 30 Jun 2026 · first reported 30 Jun 2026
origin
NVD
Vulnerability record from NVD / the GitHub Advisory Database. This product uses the NVD API but is not endorsed or certified by the NVD.
record
confidence 0.95 · created 2026-10-18 10:04Z · updated 2026-10-18 10:04Z

Lane, AI role, categories and severity come from the classifier; the OWASP and ATLAS rows are derived from the categories. How these are assigned

Copy a brief

This record as a short Markdown brief, for a ticket, a chat or a coding agent.

the brief as text
# CVE-2026-56399: Open WebUI contains a server-side request forgery vulnerability in retrieval endpoint

https://gcdradar.vercel.app/incidents/cve-2026-56399-open-webui-contains-a-server-side-request-for · AIR-2026-1140 · closed 2026-06-30

- Lane: Patch now
- Severity: 2 (Disclosed vulnerability)
- Fix status: Fix status unknown
- First reported: 2026-06-30
- AI role: Attack on AI
- Products: Open WebUI
- CVE ids: CVE-2026-56399
- CVSS: 5.3

## Summary

Open WebUI before version 0.6.27 has a server-side request forgery vulnerability in its web retrieval processing endpoint, permitting authenticated users to access internal services. A vendor update resolves the security issue.

## What to do

No action recorded; read the sources below and the vendor's advisory.

## Latest updates

- 2026-06-30: CVE-2026-56399: Open WebUI before 0.6.27 contains a server-side request forgery vulnerability in the /api/v1/retrieval/process/web endpoint that… (https://nvd.nist.gov/vuln/detail/CVE-2026-56399)

## Sources

- 2026-06-30 NVD: CVE-2026-56399: Open WebUI before 0.6.27 contains a server-side request forgery vulnerability in the /api/v1/retrieval/process/web endpoint that… https://nvd.nist.gov/vuln/detail/CVE-2026-56399

Verify against the vendor's advisory before changing production. Data CC BY-SA 4.0, https://gcdradar.vercel.app.

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