CVE-2026-45331

HIGHNVD 8.58.5—
EchelonGraph scoreMEDIUM confidence

This high-severity CVE scores 8.5 under NVD CVSS v3. EPSS exploit probability: 0.3%, top 80% 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 0.9.0, validate_url() in backend/open_webui/retrieval/web/utils.py calls validators.ipv6(ip, private=True), but the validators library does NOT implement the private keyword for IPv6 — the call raises a ValidationError (which is falsy in a boolean context), so every IPv6 address passes the filter. In addition, IPv4-mapped IPv6 (::ffff:10.0.0.1) bypasses the IPv4 check entirely, and several reserved IPv4 ranges (0.0.0.0/8, 100.64.0.0/10, 192.0.0.0/24, etc.) are not blocked. This vulnerability is fixed in 0.9.0.

CVSS v3
8.5
EG Score
8.5(medium)
EPSS
20.5%
KEV
Not listed

Published

May 15, 2026

Last Modified

May 19, 2026

Advisory Details (1)

Auto-updated May 16, 2026
🔬 Proof of concept available. Patch available. Sources: github.
github Patch Available🟡 PoC Available

Full SSRF Vulnerability in the RAG Web Search Feature · Advisory · open-webui/open-webui · GitHub

https://github.com/open-webui/open-webui/security/advisories/GHSA-4v7r-f4w8-8972

Vendor Advisories for CVE-2026-45331(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 ... 0.8.9 (151 versions)0.9.0—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 6× in last 7d / 49× 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 105 total refreshes for this CVE.

  1. 2026-07-11 08:27 UTCEPSS rescore
  2. 2026-07-09 19:10 UTCEPSS rescore
  3. 2026-07-08 15:16 UTCEPSS rescore
  4. 2026-07-07 13:46 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 09:28 UTCEG score recompute
  15. 2026-06-28 04:56 UTCEPSS rescore
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  17. 2026-06-27 21:47 UTCEG score recompute
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  20. 2026-06-26 20:07 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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  5. 2026-06-21 01:59 UTCEPSS rescore
  6. 2026-06-19 19:25 UTCEPSS rescore
  7. 2026-06-18 17:52 UTCEPSS rescore
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  9. 2026-06-18 02:59 UTCEG score recompute
  10. 2026-06-17 13:21 UTCEG score recompute
  11. 2026-06-16 22:43 UTCEG score recompute
  12. 2026-06-16 17:52 UTCEPSS rescore
  13. 2026-06-16 11:06 UTCEG score recompute
  14. 2026-06-15 23:28 UTCEG score recompute
  15. 2026-06-15 17:49 UTCEPSS rescore
  16. 2026-06-14 22:30 UTCEG score recompute
  17. 2026-06-14 10:49 UTCEG score recompute
  18. 2026-06-13 23:12 UTCEG score recompute
  19. 2026-06-13 23:00 UTCEPSS rescore
  20. 2026-06-13 08:16 UTCEG score recompute
  21. 2026-06-12 23:12 UTCEPSS rescore
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  23. 2026-06-12 20:38 UTCEG score recompute
  24. 2026-06-12 09:01 UTCEG score recompute
  25. 2026-06-11 21:18 UTCEG score recompute
  26. 2026-06-11 14:00 UTCEPSS rescore
  27. 2026-06-11 09:41 UTCEG score recompute
  28. 2026-06-10 22:18 UTCEPSS rescore
  29. 2026-06-10 22:04 UTCEG score recompute
  30. 2026-06-10 13:22 UTCEPSS rescore
  31. 2026-06-10 13:22 UTCEPSS rescore
  32. 2026-06-10 10:27 UTCEG score recompute
  33. 2026-06-09 22:47 UTCEG score recompute
  34. 2026-06-09 11:10 UTCEG score recompute
  35. 2026-06-08 23:33 UTCEG score recompute
  36. 2026-06-08 14:17 UTCEPSS rescore
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  38. 2026-06-08 11:55 UTCEG score recompute
  39. 2026-06-08 00:17 UTCEG score recompute
  40. 2026-06-07 15:25 UTCEPSS rescore
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  42. 2026-06-07 12:40 UTCEG score recompute
  43. 2026-06-07 01:03 UTCEG score recompute
  44. 2026-06-06 13:47 UTCEPSS rescore
  45. 2026-06-06 13:47 UTCEPSS rescore
  46. 2026-06-06 13:25 UTCEG score recompute
  47. 2026-06-06 01:47 UTCEG score recompute
  48. 2026-06-05 22:47 UTCEPSS rescore
  49. 2026-06-05 14:10 UTCEG score recompute
  50. 2026-06-05 02:33 UTCEG score recompute
  51. 2026-06-04 14:55 UTCEG score recompute
  52. 2026-06-04 13:12 UTCEPSS rescore
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  54. 2026-06-04 03:17 UTCEG score recompute
  55. 2026-06-03 15:39 UTCEG score recompute
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  57. 2026-06-02 20:13 UTCEPSS rescore
  58. 2026-06-02 16:22 UTCEG score recompute
  59. 2026-06-02 04:44 UTCEG score recompute
  60. 2026-06-01 17:06 UTCEG score recompute
  61. 2026-06-01 13:52 UTCEPSS rescore
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  63. 2026-06-01 05:28 UTCEG score recompute
  64. 2026-05-31 22:30 UTCEPSS rescore
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  66. 2026-05-31 00:16 UTCEPSS rescore
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  68. 2026-05-29 13:44 UTCEPSS rescore
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  72. 2026-05-27 13:40 UTCEPSS rescore
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  74. 2026-05-26 13:44 UTCEPSS rescore
  75. 2026-05-26 07:18 UTCEPSS rescore

Frequently asked(5)

What is CVE-2026-45331?
CVE-2026-45331 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 0.9.0, validateurl() in backend/openwebui/retrieval/web/utils.py calls validators.ipv6(ip, private=True), but the validators library does NOT implement the private keyword for IPv6 — the call…
When was CVE-2026-45331 disclosed?
CVE-2026-45331 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-2026-45331 actively exploited?
CVE-2026-45331 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 20.5% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-45331?
CVE-2026-45331 has a CVSS v3 base score of 8.5 (NVD).
How do I remediate CVE-2026-45331?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-45331, 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

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