CVE-2026-44564

MEDIUMNVD 5.45.4—
EchelonGraph scoreMEDIUM confidence

This medium-severity CVE scores 5.4 under NVD CVSS v3. EPSS exploit probability: 0.2%, top 88% 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
5.4
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS: 0%CVSS: 5.4Exploit: 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, the ydoc:document:update Socket.IO event handler checks whether the sender is a member of the document's Socket.IO room (line 678) but does not verify that the sender has write permission. Users with read-only access join the document room via ydoc:document:join, which only requires read permission (line 520). Once in the room, the user can emit ydoc:document:update events that modify the in-memory Yjs document state and are broadcast to all other collaborators in real time. This vulnerability is fixed in 0.9.0.

CVSS v3
5.4
EG Score
5.4(medium)
EPSS
12.5%
KEV
Not listed

Published

May 15, 2026

Last Modified

May 19, 2026

Advisory Details (1)

Auto-updated Jun 14, 2026
Patch available. Sources: github.
github Patch Available

Read-Only Users Can Modify Collaborative Documents via Socket.IO · Advisory · open-webui/open-webui · GitHub

Affected: v0.9.0:

https://github.com/open-webui/open-webui/security/advisories/GHSA-vrfh-rj4q-rmhr

Vendor Advisories for CVE-2026-44564(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 / 41× 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.

  1. 2026-07-11 08:27 UTCEPSS rescore
  2. 2026-07-09 19:10 UTCEPSS rescore
  3. 2026-07-08 15:16 UTCEPSS rescore
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  11. 2026-06-29 21:24 UTCEG score recompute
  12. 2026-06-28 14:07 UTCEPSS rescore
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  14. 2026-06-27 21:47 UTCEG score recompute
  15. 2026-06-27 03:08 UTCEPSS rescore
  16. 2026-06-26 20:07 UTCEG score recompute
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  18. 2026-06-25 13:49 UTCEPSS rescore
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  20. 2026-06-24 14:05 UTCEPSS rescore
  21. 2026-06-23 21:33 UTCEPSS rescore
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  1. 2026-06-21 01:59 UTCEPSS rescore
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  5. 2026-06-18 02:59 UTCEG score recompute
  6. 2026-06-17 17:53 UTCEPSS rescore
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  8. 2026-06-16 17:52 UTCEPSS rescore
  9. 2026-06-15 23:28 UTCEG score recompute
  10. 2026-06-15 17:49 UTCEPSS rescore
  11. 2026-06-14 16:19 UTCEG score recompute
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  16. 2026-06-12 14:25 UTCEG score recompute
  17. 2026-06-11 14:00 UTCEPSS rescore
  18. 2026-06-11 13:36 UTCEG score recompute
  19. 2026-06-10 22:18 UTCEPSS rescore
  20. 2026-06-10 13:22 UTCEPSS rescore
  21. 2026-06-10 13:22 UTCEPSS rescore
  22. 2026-06-10 12:48 UTCEG score recompute
  23. 2026-06-09 11:59 UTCEG score recompute
  24. 2026-06-08 14:17 UTCEPSS rescore
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  26. 2026-06-08 11:10 UTCEG score recompute
  27. 2026-06-07 15:25 UTCEPSS rescore
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  29. 2026-06-07 10:21 UTCEG score recompute
  30. 2026-06-06 13:47 UTCEPSS rescore
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  32. 2026-06-06 09:33 UTCEG score recompute
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  34. 2026-06-05 08:44 UTCEG score recompute
  35. 2026-06-05 06:10 UTCEPSS rescore
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  37. 2026-06-04 13:12 UTCEPSS rescore
  38. 2026-06-04 13:12 UTCEPSS rescore
  39. 2026-06-04 07:55 UTCEG score recompute
  40. 2026-06-03 07:06 UTCEG score recompute
  41. 2026-06-02 20:13 UTCEPSS rescore
  42. 2026-06-02 06:17 UTCEG score recompute
  43. 2026-06-01 13:52 UTCEPSS rescore
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  45. 2026-06-01 05:28 UTCEG score recompute
  46. 2026-05-31 22:30 UTCEPSS rescore
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  48. 2026-05-31 00:16 UTCEPSS rescore
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  50. 2026-05-29 13:44 UTCEPSS rescore
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  52. 2026-05-28 13:44 UTCEPSS rescore
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  54. 2026-05-27 13:40 UTCEPSS rescore
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  56. 2026-05-26 13:44 UTCEPSS rescore
  57. 2026-05-26 07:18 UTCEPSS rescore
  58. 2026-05-23 00:07 UTCEG score recompute
  59. 2026-05-21 22:43 UTCEPSS rescore
  60. 2026-05-20 22:38 UTCEPSS rescore
  61. 2026-05-20 12:00 UTCEG score recompute
  62. 2026-05-20 11:22 UTCEPSS rescore

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-44564?
CVE-2026-44564 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 0.9.0, the ydoc:document:update Socket.IO event handler checks whether the sender is a member of the document's Socket.IO room (line 678) but does not verify that the sender has write…
When was CVE-2026-44564 disclosed?
CVE-2026-44564 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-2026-44564 actively exploited?
CVE-2026-44564 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 12.5% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-44564?
CVE-2026-44564 has a CVSS v3 base score of 5.4 (NVD).
How do I remediate CVE-2026-44564?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-44564, 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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