CVE-2026-45401

HIGHNVD 8.58.5—
EchelonGraph scoreMEDIUM confidence

This high-severity CVE scores 8.5 under NVD CVSS v3. EPSS exploit probability: 0.3%, top 78% 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
Elevated
8.5
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 0%CVSS: 8.5Exploit: NoneExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

Open WebUI is a self-hosted artificial intelligence platform designed to operate entirely offline. Prior to 0.9.5, the validate_url() function in backend/open_webui/retrieval/web/utils.py only validates the initial URL submitted by the caller. The HTTP clients used downstream (sync requests, async aiohttp, langchain's WebBaseLoader) follow HTTP 3xx redirects by default and do not re-validate the redirect target against the private-IP / metadata-IP block list. Any authenticated user can therefore submit a public URL that 302-redirects to an internal address (e.g. 127.0.0.1, 169.254.169.254, RFC1918) and read the internal response body via the /api/v1/retrieval/process/web endpoint, the /api/v1/images/... endpoints, the /api/chat/completions endpoint with an image_url content part, and any other route that calls these helpers. This vulnerability is fixed in 0.9.5.

CVSS v3
8.5
EG Score
8.5(medium)
EPSS
21.8%
KEV
Not listed

Published

May 15, 2026

Last Modified

May 19, 2026

Advisory Details (1)

Auto-updated May 18, 2026
🔬 Proof of concept available. Patch available. Sources: github.
github Patch Available🟡 PoC Available

SSRF Bypass via HTTP Redirect Following in Web-Fetch and Image-Load Endpoints (not addressed by CVE-2025-65958) · Advisory · open-webui/open-webui · GitHub

https://github.com/open-webui/open-webui/security/advisories/GHSA-rh5x-h6pp-cjj6

Vendor Advisories for CVE-2026-45401(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Affected Packages

(1 across 1 ecosystem)
PyPI(1)
PackageVulnerable rangeFixed inDependents
open-webui0.1.124 ... 0.9.4 (156 versions)0.9.5—

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 5× in last 7d / 50× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

Showing the most recent 100 of 107 total refreshes for this CVE.

  1. 2026-07-11 08:27 UTCEPSS rescore
  2. 2026-07-09 19:10 UTCEPSS rescore
  3. 2026-07-07 13:46 UTCEPSS rescore
  4. 2026-07-06 16:27 UTCEPSS rescore
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  9. 2026-06-30 23:22 UTCEPSS rescore
  10. 2026-06-29 21:23 UTCEG score recompute
  11. 2026-06-29 14:06 UTCEPSS rescore
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  13. 2026-06-28 14:07 UTCEPSS rescore
  14. 2026-06-28 09:57 UTCEG score recompute
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  17. 2026-06-27 21:46 UTCEG score recompute
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  19. 2026-06-27 03:08 UTCEPSS rescore
  20. 2026-06-26 20:06 UTCEG score recompute
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  22. 2026-06-25 13:49 UTCEPSS rescore
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  24. 2026-06-23 21:33 UTCEPSS rescore
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  1. 2026-06-22 14:25 UTCEPSS rescore
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  3. 2026-06-21 14:56 UTCEPSS rescore
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  6. 2026-06-19 19:25 UTCEPSS rescore
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  9. 2026-06-18 02:58 UTCEG score recompute
  10. 2026-06-17 17:53 UTCEPSS rescore
  11. 2026-06-17 13:20 UTCEG score recompute
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  16. 2026-06-15 17:49 UTCEPSS rescore
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  20. 2026-06-13 23:00 UTCEPSS rescore
  21. 2026-06-13 08:33 UTCEG score recompute
  22. 2026-06-12 23:12 UTCEPSS rescore
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  24. 2026-06-12 20:26 UTCEG score recompute
  25. 2026-06-12 08:21 UTCEG score recompute
  26. 2026-06-11 20:16 UTCEG score recompute
  27. 2026-06-11 14:00 UTCEPSS rescore
  28. 2026-06-11 08:11 UTCEG score recompute
  29. 2026-06-10 22:18 UTCEPSS rescore
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  31. 2026-06-10 13:22 UTCEPSS rescore
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  33. 2026-06-10 08:00 UTCEG score recompute
  34. 2026-06-09 19:55 UTCEG score recompute
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  36. 2026-06-08 19:44 UTCEG score recompute
  37. 2026-06-08 14:17 UTCEPSS rescore
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  39. 2026-06-08 06:44 UTCEG score recompute
  40. 2026-06-07 18:38 UTCEG score recompute
  41. 2026-06-07 15:25 UTCEPSS rescore
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  43. 2026-06-07 06:32 UTCEG score recompute
  44. 2026-06-06 18:27 UTCEG score recompute
  45. 2026-06-06 13:47 UTCEPSS rescore
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  47. 2026-06-06 06:22 UTCEG score recompute
  48. 2026-06-05 22:47 UTCEPSS rescore
  49. 2026-06-05 18:17 UTCEG score recompute
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  51. 2026-06-05 06:10 UTCEPSS rescore
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  53. 2026-06-04 18:06 UTCEG score recompute
  54. 2026-06-04 13:12 UTCEPSS rescore
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  56. 2026-06-04 06:01 UTCEG score recompute
  57. 2026-06-03 17:56 UTCEG score recompute
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  59. 2026-06-02 20:13 UTCEPSS rescore
  60. 2026-06-02 17:44 UTCEG score recompute
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  63. 2026-06-01 13:52 UTCEPSS rescore
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  65. 2026-06-01 05:28 UTCEG score recompute
  66. 2026-05-31 22:30 UTCEPSS rescore
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  70. 2026-05-29 13:44 UTCEPSS rescore
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  74. 2026-05-27 13:40 UTCEPSS rescore
  75. 2026-05-27 13:40 UTCEPSS rescore

Frequently asked(5)

What is CVE-2026-45401?
CVE-2026-45401 is a high vulnerability published on May 15, 2026. Open WebUI is a self-hosted artificial intelligence platform designed to operate entirely offline. Prior to 0.9.5, the validateurl() function in backend/openwebui/retrieval/web/utils.py only validates the initial URL submitted by the caller. The HTTP clients used downstream (sync requests, async…
When was CVE-2026-45401 disclosed?
CVE-2026-45401 was first published in the National Vulnerability Database on May 15, 2026, with the most recent update on May 19, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-45401 actively exploited?
CVE-2026-45401 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 21.8% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-45401?
CVE-2026-45401 has a CVSS v3 base score of 8.5 (NVD).
How do I remediate CVE-2026-45401?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-45401, 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.

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