CVE-2026-45400
📛 CVE Title
Open WebUI: Server-Side Request Forgery (SSRF) bypass in `validate_url`
Description
Open WebUI is a self-hosted artificial intelligence platform designed to operate entirely offline. Prior to 0.9.5, a parsing difference between the urlparse and requests libraries led to an SSRF bypass vulnerability. This vulnerability is fixed in 0.9.5.
Overview
- State
- PUBLISHED
- Assigner (CNA)
- GitHub_M
- CVSS severity
- HIGH
- CVSS score
- 8.5 / 10
- CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:L/A:N- Effective score
- 8.5 / 10 HIGH source: CNA overview
- CWE(s)
-
CWE-918 - Reserved
- 2026-05-12
- Published
- 2026-05-15 22:40 UTC
- Last updated
- 2026-05-15 23:07 UTC
- Source
- https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2026/45xxx/CVE-2026-45400.json
- Linked Threat
- CVE-2026-45400 — Open WebUI: Server-Side Request Forgery (SSRF) bypass in `validate_url`
NVD triage scoring NVD CVE 2.0
Layer NVD adds on top of the CNA's CVE record — published / last-modified timestamps, exploitability / impact subscores, and the FIRST.org EPSS probability that this CVE will be exploited in the wild in the next 30 days.
- NVD published
- 2026-05-15 21:16:38 UTC
- NVD last modified
- 2026-05-19 12:08:07 UTC
- NVD CVSS v3.1
- 8.5 / 10 HIGH source: security-advisories@github.com
- NVD CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:L/A:N- Exploitability subscore
- 3.1 / 10
- Impact subscore
- 4.7 / 10
- EPSS score
- 0.0003 (probability of exploitation in next 30 days)
- EPSS percentile
- 10.01% vs all CVEs — higher = more likely to be exploited, as of 2026-05-24
NVD / KEV / EPSS data refreshed 2026-05-25 08:28 UTC. Re-run the 🛰 Backfill from NVD button above to refresh.
European Union Vulnerability Database ENISA EUVD
ENISA's official EU repository for curated vulnerability intelligence. Carries a separate identifier (EUVD-YYYY-NNNN) and frequently exposes an earlier-published description + CVSS than NVD does.
- EUVD ID
-
EUVD-2026-30636 - Assigner
- GitHub_M
- Published
- May 15, 2026, 8:40:47 PM
- Updated
- May 15, 2026, 9:07:50 PM
- EUVD base score (CVSS 3.1)
-
8.5 / 10
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:L/A:N - EUVD-reported EPSS
- 0.0300
- Vendors
- open-webui
- Products
-
open-webui (< 0.9.5)
- Aliases
-
GHSA-8w7q-q5jp-jvgx
ENISA description: Open WebUI is a self-hosted artificial intelligence platform designed to operate entirely offline. Prior to 0.9.5, a parsing difference between the urlparse and requests libraries led to an SSRF bypass vulnerability. This vulnerability is fixed in 0.9.5.
EUVD references (1)
Affected products (1)
| Vendor | Product | Versions | Platforms |
|---|---|---|---|
| open-webui | open-webui |
< 0.9.5 (affected)
|
— |
Affected products — CPE 2.3 (1) NVD
NVD's normalized CPE 2.3 matchers, used by vendor tools (vulnerability scanners, asset managers) for automated detection. Compare with the CNA's free-text "Affected products" section above.
cpe:2.3:a:openwebui:open_webui:*:*:*:*:*:*:*:*
Vendor references (1)
References embedded in the original CVE record by the assigning CNA.
- https://github.com/open-webui/open-webui/security/advisories/GHSA-8w7q-q5jp-jvgx x_refsource_CONFIRM
MITRE references (1) cveawg.mitre.org
Pulled from MITRE's CVE Services API by the 🛰 Backfill from MITRE button.
- https://github.com/open-webui/open-webui/security/advisories/GHSA-8w7q-q5jp-jvgx x_refsource_CONFIRM
Web references (3)
DuckDuckGo results ranked by threat-intel / vendor advisory domains. Generated by the 🔎 Find references (web) button above — same flow as the Remediations search.
- https://nvd.nist.gov/vuln/detail/CVE-2026-45400 tenable:nvd.nist.gov
- https://www.cve.org/CVERecord?id=CVE-2026-45400 tenable:www.cve.org
- https://www.first.org/epss/ tenable:www.first.org
NVD-tagged references (2)
Reference list NVD curates from the CNA record, vendor advisories, and third-party reports. The tag chips below are NVD's analyst-assigned categories.
- https://github.com/open-webui/open-webui/security/advisories/GHSA-8w7q-q5jp-jvgx security-advisories@github.com ExploitVendor Advisory
- https://github.com/open-webui/open-webui/security/advisories/GHSA-8w7q-q5jp-jvgx 134c704f-9b21-4f2e-91b3-4a467353bcc0 ExploitVendor Advisory
Remediations (17)
Remediations are stored against the linked Threat row; the list below is deduplicated across both pages.
-
web:blog.qualys.com
With Qualys Policy Audit's out-of-the-box mitigation or Compensatory Controls, which reduce the risk of a vulnerability being exploited because the remediation ( fix / patch ) cannot be done immediately, these security controls are not recommended by any industry standards, such as CIS and DISA-STIG.
2026-05-22 17:25 UTC -
web:cybersecuritynews.com
Microsoft has released its April 2026 Patch Tuesday security update, addressing 168 vulnerabilities across its product portfolio including one actively exploited zero-day and one publicly disclosed flaw that organizations must prioritize immediately.
2026-05-22 17:25 UTC -
web:dbsguru.com
Below is the list of Oracle Critical Patch IDs for all versions (26i, 21c, 19c) of Grid & Databases, along with combo PSU, EXADATA, and SUPERCLUSTER patch IDs for April 2026 . All patch IDs are enabled using the direct download link. An Essential/Critical Patch Update could be a collection of patches for multiple security vulnerabilities. These patches address vulnerabilities in Oracle code and ...
2026-05-22 17:25 UTC -
web:www.crowdstrike.com
Microsoft's April 2026 Patch Tuesday addresses 164 CVEs , featuring 8 Critical vulnerabilities, one exploited zero-day, and one disclosed zero-day.
2026-05-22 17:25 UTC -
web:www.techrepublic.com
Microsoft's April 2026 Patch Tuesday fixes 165 vulnerabilities, including two zero-days, in one of the company's largest monthly security updates.
2026-05-22 17:25 UTC -
web:www.windowslatest.com
Windows 11 April 2026 update adds Narrator Copilot support, faster Settings, File Explorer fixes, and key security improvements.
2026-05-22 17:25 UTC -
web:zecurit.com
Get the complete breakdown of Microsoft's May 2026 Patch Tuesday. We analyze the latest security updates and all critical CVEs .
2026-05-22 17:25 UTC -
web:thehackernews.com
Active Defender exploits hit CVE - 2026 -41091 and CVE - 2026 -45498; June 3 fixes reduce SYSTEM and DoS risk.
2026-05-22 03:23 UTC -
web:vulert.com
Learn about CVE-2026-45400 , an SSRF bypass vulnerability in Open WebUI. Discover how to fix it and safeguard your applications.
2026-05-22 03:23 UTC -
web:www.cisecurity.org
<p>Multiple vulnerabilities have been discovered in Microsoft products, the most severe of which could allow for remote code execution. Successful exploitation of the most severe of these vulnerabilities could result in an attacker gaining the same privileges as the logged-on user. Depending on the privileges associated with the user, an attacker could then install programs; view, change, or ...
2026-05-22 03:23 UTC -
web:www.thehackerwire.com
CVE-2026-45400 is a High severity vulnerability (CVSS 8.5). Open WebUI is a self-hosted artificial intelligence platform designed to operate entirely offline. Prior to 0.9.5, a parsing difference between...
2026-05-22 03:23 UTC -
web:www.oracle.com
This Critical Patch Update contains 481 new security patches across the product families listed below. Please note that an MOS note summarizing the content of this Critical Patch Update and other Oracle Software Security Assurance activities is located at April 2026 Critical Patch Update: Executive Summary and Analysis.
2026-05-22 03:23 UTC -
web:cybersecuritynews.com
Microsoft's May 2026 Patch Tuesday lands with a heavy enterprise focus, fixing 120 vulnerabilities across Windows, Office, Azure, developer tools, and Microsoft 365 apps, including 29 remote code execution (RCE) flaws rated Critical.
2026-05-22 03:23 UTC -
web:www.pcworld.com
Windows 11's Secure Boot fix update finally rolls out to more PCs Important security certificates for Windows 11 will soon expire for many users.
2026-05-22 03:23 UTC -
web:nvd.nist.gov
An official website of the United States government Here's how you know
2026-05-22 03:23 UTC -
web:oradba.ch
19c 26ai cve oracle-cpu patch -management release-update security Oracle CPU April 2026 : Delayed RUs & First Analysis On April 21, 2026 , Oracle released the Critical Patch Update (CPU) for April 2026 — 481 new security fixes across the entire Oracle product stack. For Oracle Database, this means another round of mandatory patching.
2026-05-22 03:23 UTC -
web:portal.msrc.microsoft.com
The Security Update Guide provides information on the latest Microsoft security updates, helping users understand and address potential vulnerabilities effectively.
2026-05-22 03:23 UTC
AI Forensic Analysis
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Raw JSON
The full cvelistV5 record. Download as CVE-2026-45400.json.
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