CVE-2026-44561

MEDIUMNVD 5.45.4—
EchelonGraph scoreMEDIUM confidence

This medium-severity CVE scores 5.4 under NVD CVSS v3. EPSS exploit probability: 0.2%, top 92% 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
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 is_user_channel_member function checks whether a ChannelMember row exists but does not check the is_active field. When a user is deactivated from a group or DM channel (removed by the channel owner, or leaves voluntarily), their membership row persists with is_active=False and status='left'. Because the authorization check ignores this field, the deactivated user retains full read and write access to the channel via direct API calls. This vulnerability is fixed in 0.9.0.

CVSS v3
5.4
EG Score
5.4(medium)
EPSS
7.5%
KEV
Not listed

Published

May 15, 2026

Last Modified

May 19, 2026

Advisory Details (1)

Auto-updated Jun 16, 2026
Patch available. Sources: github.
github Patch Available

Deactivated Channel Members Retain Full Access to Group/DM Channels · Advisory · open-webui/open-webui · GitHub

https://github.com/open-webui/open-webui/security/advisories/GHSA-hmgr-67hw-j2cq

Vendor Advisories for CVE-2026-44561(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 5× in last 7d / 40× 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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  9. 2026-06-30 23:22 UTCEPSS rescore
  10. 2026-06-29 21:24 UTCEG score recompute
  11. 2026-06-28 14:07 UTCEPSS rescore
  12. 2026-06-28 04:56 UTCEPSS rescore
  13. 2026-06-27 21:47 UTCEG score recompute
  14. 2026-06-27 03:08 UTCEPSS rescore
  15. 2026-06-26 20:08 UTCEG score recompute
  16. 2026-06-25 18:43 UTCEG score recompute
  17. 2026-06-25 13:49 UTCEPSS rescore
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  19. 2026-06-24 14:05 UTCEPSS rescore
  20. 2026-06-23 21:33 UTCEPSS rescore
  21. 2026-06-22 14:25 UTCEPSS rescore
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  25. 2026-06-21 01:59 UTCEPSS rescore
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  1. 2026-06-19 19:25 UTCEPSS rescore
  2. 2026-06-18 17:52 UTCEPSS rescore
  3. 2026-06-18 17:52 UTCEPSS rescore
  4. 2026-06-17 21:34 UTCEG score recompute
  5. 2026-06-17 17:53 UTCEPSS rescore
  6. 2026-06-16 22:31 UTCEG score recompute
  7. 2026-06-16 17:52 UTCEPSS rescore
  8. 2026-06-15 23:28 UTCEG score recompute
  9. 2026-06-15 17:49 UTCEPSS rescore
  10. 2026-06-14 22:16 UTCEG score recompute
  11. 2026-06-13 23:12 UTCEG score recompute
  12. 2026-06-13 23:00 UTCEPSS rescore
  13. 2026-06-12 23:12 UTCEPSS rescore
  14. 2026-06-12 23:12 UTCEPSS rescore
  15. 2026-06-12 18:52 UTCEG score recompute
  16. 2026-06-11 19:49 UTCEG score recompute
  17. 2026-06-11 14:00 UTCEPSS rescore
  18. 2026-06-10 22:18 UTCEPSS rescore
  19. 2026-06-10 20:46 UTCEG score recompute
  20. 2026-06-10 13:22 UTCEPSS rescore
  21. 2026-06-10 13:22 UTCEPSS rescore
  22. 2026-06-09 21:38 UTCEG score recompute
  23. 2026-06-08 21:53 UTCEG score recompute
  24. 2026-06-08 14:17 UTCEPSS rescore
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  26. 2026-06-07 22:50 UTCEG score recompute
  27. 2026-06-07 15:25 UTCEPSS rescore
  28. 2026-06-07 15:25 UTCEPSS rescore
  29. 2026-06-06 23:47 UTCEG score recompute
  30. 2026-06-06 13:47 UTCEPSS rescore
  31. 2026-06-06 13:47 UTCEPSS rescore
  32. 2026-06-06 00:43 UTCEG score recompute
  33. 2026-06-05 22:47 UTCEPSS rescore
  34. 2026-06-05 06:10 UTCEPSS rescore
  35. 2026-06-05 06:10 UTCEPSS rescore
  36. 2026-06-05 01:41 UTCEG score recompute
  37. 2026-06-04 13:12 UTCEPSS rescore
  38. 2026-06-04 13:12 UTCEPSS rescore
  39. 2026-06-04 02:38 UTCEG score recompute
  40. 2026-06-03 03:35 UTCEG score recompute
  41. 2026-06-02 20:13 UTCEPSS rescore
  42. 2026-06-02 04:32 UTCEG score recompute
  43. 2026-06-01 13:52 UTCEPSS rescore
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  45. 2026-06-01 05:29 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 11:59 UTCEG score recompute
  62. 2026-05-20 11:22 UTCEPSS rescore

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-44561?
CVE-2026-44561 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 isuserchannelmember function checks whether a ChannelMember row exists but does not check the isactive field. When a user is deactivated from a group or DM channel (removed by the…
When was CVE-2026-44561 disclosed?
CVE-2026-44561 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-2026-44561 actively exploited?
CVE-2026-44561 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 7.5% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-44561?
CVE-2026-44561 has a CVSS v3 base score of 5.4 (NVD).
How do I remediate CVE-2026-44561?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-44561, 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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