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VulnerabilityPublished Updated

CVE-2026-44558: open-webui · Missing Authorization

Affects open-webuiSource GCVE Database

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Not known to be exploited · CVSS 5.4 Medium : upgrade to 0.9.0 when convenient.

Data as of 12 Nov 2026, 00:18 UTC

CVSS 3.1 base score
5.4Medium
How severe the flaw is on the 0–10 CVSS scale.

Thin evidence

One scorer or none
CVSS scores by source
CNA (GitHub_M)CVSS 3.15.4
EPSS
0.1% chance of exploitation in 30 days – higher than 8% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch
Available – fixed in 0.9.0
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 15 May 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 11 Nov 2026.

What to do

Upgrade open-webui to 0.9.0.

Affected software

ProductAffectedFixed in
open-webui open-webuiAffected
  • <0.9.0
Fixed in
  • 0.9.0

AI-suggested

Upgrade Open WebUI to version 0.9.0 or later, where the vulnerability is fixed. No other mitigation is required as the vendor has provided an official fix.

Description

Open WebUI versions prior to 0.9.0 contain an authorization bypass vulnerability in the channel router. Non-admin users who can create or own group channels can submit arbitrary access grants, including public wildcard grants, which are stored without proper permission checks. This bypasses the admin permission framework and allows unauthorized access. The issue is fixed in version 0.9.0.

References

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