CVE-2026-45347· NVD / CVE Program· CNA GitHub_M

Open WebUI: Blind server side request forgery (SSRF) via the PDF generate function

Noroxi assessment

Priority: Monitor (action score 21/100)

The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
Probability of exploitation in the next 30 days: 0.25% (FIRST EPSS).
Anyone who can reach it over the internet can trigger it. A low-privileged account is enough. No user action is required. No special conditions are required; it is repeatable.
Fixed version: open-webui open-webui 0.5.11.

Low priority for now. Upgrade to open-webui open-webui 0.5.11 or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

Open WebUI is a self-hosted artificial intelligence platform designed to operate entirely offline. Prior to 0.5.11, there is a blind server side request forgery (SSRF) via the PDF generate function. In the PDF export, user inputs are interpreted as HTML and embedded into the PDF. According to tests, scripts and some potentially dangerous tags (iFrame, Object, etc.) are blocked, preventing server-side content from being read through this vulnerability. However, an image tag can be used to force a server-side request (SSRF), as shown in the following below. This vulnerability is fixed in 0.5.11.

MediumCVSS 5.4 · v3.1—No exploit Fix available

SSRF

Published: May 15, 2026
Updated: Jun 17, 2026
EPSS: 0.2% · 15th percentile
CWE: CWE-918

Report tools

JSON

Action score

Monitor

Low priority for now.

CVSS: 21 / 40 · 5.4 / 10
CISA KEV: 0 / 30 · Not listed
EPSS: 0 / 30 · 0.2%

CISA SSVC decision

Exploitation: proof of concept
Automatable: no
Technical impact: partial

Vulnrichment: CISA's decision-tree inputs.

CNA vs NVD score

NVD: 5.4
CNA · GitHub_M: 4.3; 1.1 point gap

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N

The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.

Get told when this record changes

Not in KEV: no record of exploitation in the wild
No public exploit code on record
A fix has been released

If any of these changes, we'll tell you in the daily email digest.

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

Vendor	Product	CPE
openwebui	open webui	cpe:2.3:a:openwebui:open_webui

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

openwebui open webuibefore 0.5.11

Versions reported by the vendor

Affected version ranges reported by the assigning authority (GitHub_M). Independent of NVD's CPE analysis and usually ahead of it.

open-webui open-webui
- < 0.5.11affected

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

Ecosystem	Package	Affected range	Fix
PyPI	open-webui	before 0.5.11	0.5.11

Same product

openwebui: all records

Other highest-scoring records for the same primary product.

CVE-2026-44566Open WebUI: Arbitrary File Upload and Path Traversal
39Monitor
CVE-2026-56400open-webui - Remote Code Execution via CORS Misconfiguration and Session Validation
36Monitor
CVE-2026-59216Open WebUI: Cross-user code-interpreter and tool execution via unvalidated Socket.IO event-caller session_id
36Monitor

Published before and after this one in the same product

← EarlierCVE-2026-45345May 15, 2026 · Open WebUI: Missing authorization check at the model update function - models from other users can be updated
26Monitor
← EarlierCVE-2026-45346May 15, 2026 · Open WebUI: Stored Cross-Site Scripting in SVG Renderer
20Monitor
Later →CVE-2026-45350May 15, 2026 · Open WebUI: Chat completion API allows tool restrictions to be bypassed
28Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / package	Fixed version	Source
open-webui open-webui	0.5.11 · description	Vendor (CNA)
PyPI:open-webui	0.5.11	Package registry (OSV)

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

CVE-2026-454000 days apartOpen WebUI: Server-Side Request Forgery (SSRF) bypass in `validate_url`
34Monitor
CVE-2026-453310 days apartOpen WebUI: Full SSRF Vulnerability in the RAG Web Search Feature
34Monitor
CVE-2026-454010 days apartOpen WebUI: SSRF Bypass via HTTP Redirect Following in Web-Fetch and Image-Load Endpoints
34Monitor
CVE-2026-5400839 days apartOpen WebUI: Redirect-Bypass SSRF in OAuth `_process_picture_url`
34Monitor
CVE-2026-453380 days apartOpen WebUI: SSRF via OAuth Profile Picture URL in _process_picture_url (oauth.py)
30Monitor
CVE-2026-5401839 days apartOpen WebUI: SSRF Protection Bypass in Playwright Web Loader via HTTP Redirects
30Monitor

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

CVE-2026-445510 days apartOpen WebUI: LDAP Empty Password Authentication Bypass
36Monitor
CVE-2026-453970 days apartOpen WebUI: Unauthenticated RAG Configuration Disclosure
21Monitor

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

Technical details

Attack conditions

Anyone who can reach it over the internet can trigger it.
A low-privileged account is enough.
No user action is required.
No special conditions are required; it is repeatable.

If successful

Confidentiality: low · data can be read
Integrity: low · data or configuration can be modified
Availability: none

Attack vector: Network
Attack complexity: Low
Privileges required: Low
User interaction: None
Scope: Unchanged
Confidentiality impact: Low
Integrity impact: Low
Availability impact: None

Weakness class (CWE)

CWE-918 · Server-Side Request Forgery (SSRF)

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N

nvd-primary

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

Attack patterns (CAPEC)

Server Side Request ForgeryCAPEC-664likelihood: High · High

ATT&CK techniques

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Change log

Fix✗ → ✓Sep 28, 2026, 10:48 PM UTC

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