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.
CVE-2026-45347
MEDIUMNVD 4.34.3—
EchelonGraph scoreMEDIUM confidence
This medium-severity CVE scores 4.3 under NVD CVSS v3. EPSS exploit probability: 0.0%, top 91% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).
Triggered by: NVD CVSS baseline
Sources: epss, nvd
4.3
- CVSS v3
- 4.3
- EG Score
- 4.3(medium)
- EPSS
- 8.9%
- KEV
- Not listed
Published
May 15, 2026
Last Modified
May 18, 2026
References (2)
- security-advisories@githubhttps://github.com/open-webui/open-webui/security/advisories/GHSA-f776-fp4w-266c
- 134c704f-9b21-4f2e-91b3-4a467353bcc0https://github.com/open-webui/open-webui/security/advisories/GHSA-f776-fp4w-266c
Frequently asked(5)
What is CVE-2026-45347?
CVE-2026-45347 is a medium vulnerability published on May 15, 2026. 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…
When was CVE-2026-45347 disclosed?
CVE-2026-45347 was first published in the National Vulnerability Database on May 15, 2026, with the most recent update on May 18, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-45347 actively exploited?
CVE-2026-45347 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 8.9% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-45347?
CVE-2026-45347 has a CVSS v3 base score of 4.3 (NVD).
How do I remediate CVE-2026-45347?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-45347, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.
Dependency Blast Radius
See which npm, PyPI, Go, and Maven packages are affected by CVE-2026-45347
Is Your Infrastructure Affected by CVE-2026-45347?
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