CVE-2026-45338

HIGHNVD 7.77.7—
EchelonGraph scoreMEDIUM confidence

This high-severity CVE scores 7.7 under NVD CVSS v3. EPSS exploit probability: 0.4%, top 70% 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
7.7
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 0%CVSS: 7.7Exploit: 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, a Server-Side Request Forgery (SSRF) vulnerability exists in _process_picture_url() in backend/open_webui/utils/oauth.py (line ~1338). The function fetches arbitrary URLs from OAuth picture claims without applying validate_url(), allowing an attacker to force the server to make HTTP requests to internal resources and exfiltrate the full response. This vulnerability is fixed in 0.9.0.

CVSS v3
7.7
EG Score
7.7(medium)
EPSS
30.2%
KEV
Not listed

Published

May 15, 2026

Last Modified

May 18, 2026

Advisory Details (1)

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

SSRF via OAuth Profile Picture URL in _process_picture_url (oauth.py) · Advisory · open-webui/open-webui · GitHub

https://github.com/open-webui/open-webui/security/advisories/GHSA-24c9-2m8q-qhmh

Vendor Advisories for CVE-2026-45338(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 / 48× 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 103 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 21:22 UTCEG score recompute
  11. 2026-06-28 14:07 UTCEPSS rescore
  12. 2026-06-28 10:57 UTCEG score recompute
  13. 2026-06-28 04:56 UTCEPSS rescore
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  15. 2026-06-27 21:45 UTCEG score recompute
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  17. 2026-06-27 03:08 UTCEPSS rescore
  18. 2026-06-26 20:05 UTCEG score recompute
  19. 2026-06-25 18:39 UTCEG score recompute
  20. 2026-06-25 13:49 UTCEPSS rescore
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  22. 2026-06-23 21:33 UTCEPSS rescore
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  1. 2026-06-21 14:56 UTCEPSS rescore
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  3. 2026-06-21 01:59 UTCEPSS rescore
  4. 2026-06-19 19:25 UTCEPSS rescore
  5. 2026-06-18 17:52 UTCEPSS rescore
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  7. 2026-06-18 02:54 UTCEG score recompute
  8. 2026-06-17 17:53 UTCEPSS rescore
  9. 2026-06-17 13:20 UTCEG score recompute
  10. 2026-06-17 00:00 UTCEG score recompute
  11. 2026-06-16 17:52 UTCEPSS rescore
  12. 2026-06-16 11:44 UTCEG score recompute
  13. 2026-06-15 23:26 UTCEG score recompute
  14. 2026-06-15 17:49 UTCEPSS rescore
  15. 2026-06-15 03:59 UTCEG score recompute
  16. 2026-06-14 15:39 UTCEG score recompute
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  18. 2026-06-13 23:00 UTCEPSS rescore
  19. 2026-06-13 15:07 UTCEG score recompute
  20. 2026-06-12 23:49 UTCEG score recompute
  21. 2026-06-12 23:12 UTCEPSS rescore
  22. 2026-06-12 23:12 UTCEPSS rescore
  23. 2026-06-12 11:32 UTCEG score recompute
  24. 2026-06-11 23:14 UTCEG score recompute
  25. 2026-06-11 14:00 UTCEPSS rescore
  26. 2026-06-11 10:59 UTCEG score recompute
  27. 2026-06-10 22:42 UTCEG score recompute
  28. 2026-06-10 22:18 UTCEPSS rescore
  29. 2026-06-10 13:22 UTCEPSS rescore
  30. 2026-06-10 13:22 UTCEPSS rescore
  31. 2026-06-10 10:27 UTCEG score recompute
  32. 2026-06-09 22:11 UTCEG score recompute
  33. 2026-06-09 09:55 UTCEG score recompute
  34. 2026-06-08 21:40 UTCEG score recompute
  35. 2026-06-08 14:17 UTCEPSS rescore
  36. 2026-06-08 14:17 UTCEPSS rescore
  37. 2026-06-08 09:09 UTCEG score recompute
  38. 2026-06-07 20:53 UTCEG score recompute
  39. 2026-06-07 08:37 UTCEG score recompute
  40. 2026-06-06 20:22 UTCEG score recompute
  41. 2026-06-06 13:47 UTCEPSS rescore
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  43. 2026-06-06 08:06 UTCEG score recompute
  44. 2026-06-05 22:47 UTCEPSS rescore
  45. 2026-06-05 19:50 UTCEG score recompute
  46. 2026-06-05 07:34 UTCEG score recompute
  47. 2026-06-05 06:10 UTCEPSS rescore
  48. 2026-06-05 06:10 UTCEPSS rescore
  49. 2026-06-04 19:18 UTCEG score recompute
  50. 2026-06-04 13:12 UTCEPSS rescore
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  52. 2026-06-04 07:02 UTCEG score recompute
  53. 2026-06-03 18:46 UTCEG score recompute
  54. 2026-06-03 06:30 UTCEG score recompute
  55. 2026-06-02 20:13 UTCEPSS rescore
  56. 2026-06-02 18:14 UTCEG score recompute
  57. 2026-06-02 05:58 UTCEG score recompute
  58. 2026-06-01 17:42 UTCEG score recompute
  59. 2026-06-01 13:52 UTCEPSS rescore
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  61. 2026-06-01 05:26 UTCEG score recompute
  62. 2026-05-31 22:30 UTCEPSS rescore
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  64. 2026-05-31 00:16 UTCEPSS rescore
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  66. 2026-05-29 13:44 UTCEPSS rescore
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  70. 2026-05-27 13:40 UTCEPSS rescore
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  72. 2026-05-26 13:44 UTCEPSS rescore
  73. 2026-05-26 07:18 UTCEPSS rescore
  74. 2026-05-23 00:07 UTCEG score recompute
  75. 2026-05-21 22:43 UTCEPSS rescore

Frequently asked(5)

What is CVE-2026-45338?
CVE-2026-45338 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, a Server-Side Request Forgery (SSRF) vulnerability exists in processpictureurl() in backend/openwebui/utils/oauth.py (line ~1338). The function fetches arbitrary URLs from OAuth…
When was CVE-2026-45338 disclosed?
CVE-2026-45338 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-2026-45338 actively exploited?
CVE-2026-45338 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 30.2% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-45338?
CVE-2026-45338 has a CVSS v3 base score of 7.7 (NVD).
How do I remediate CVE-2026-45338?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-45338, 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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