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CVE-2026-45675

Open WebUI is a self-hosted artificial intelligence platform designed to operate entirely offline. Prior to 0.9.0, the LDAP and OAuth authentication flows use a TOCTOU (Time-of-Check-Time-of-Use) pattern for first-user admin role assignment. The regular signup handler (signup_handler in auths.py, line 663) was explicitly patched to prevent this race with the comment "Insert with default role first to avoid TOCTOU race", but the LDAP and OAuth code paths were never updated with the same fix. This
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:7d4075cd4d2a5559abda322321879fece6587e136ad4b561351c1914dd2428aa
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
1

Preserved source conflicts

No provider value was silently selected as the winner.

cwe · 2 assertions

{"cweId":"CWE-362","description":"CWE-362: Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')","lang":"en","type":"CWE"}

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:9888f49fdb9f2b9c108517fadbcdb37e7b5943d7dc56934f7a6de7f6c15aa0ab · sha256:f83beba8dd0ba5e9… · /containers/cna/problemTypes/1/descriptions/0

{"cweId":"CWE-269","description":"CWE-269: Improper Privilege Management","lang":"en","type":"CWE"}

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:9888f49fdb9f2b9c108517fadbcdb37e7b5943d7dc56934f7a6de7f6c15aa0ab · sha256:f83beba8dd0ba5e9… · /containers/cna/problemTypes/0/descriptions/0

Affected products and versions

1 source assertion
{"product":"open-webui","vendor":"open-webui","versions":[{"status":"affected","version":"< 0.9.0"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:9888f49fdb9f2b9c108517fadbcdb37e7b5943d7dc56934f7a6de7f6c15aa0ab · sha256:f83beba8dd0ba5e9… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion
{"metric":{"attackComplexity":"HIGH","attackVector":"NETWORK","availabilityImpact":"HIGH","baseScore":8.1,"baseSeverity":"HIGH","confidentialityImpact":"HIGH","integrityImpact":"HIGH","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H","version":"3.1"},"metric_type":"cvssV3_1"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:9888f49fdb9f2b9c108517fadbcdb37e7b5943d7dc56934f7a6de7f6c15aa0ab · sha256:f83beba8dd0ba5e9… · /containers/cna/metrics/0/cvssV3_1

CWE assertions

2 source assertions
{"cweId":"CWE-362","description":"CWE-362: Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:9888f49fdb9f2b9c108517fadbcdb37e7b5943d7dc56934f7a6de7f6c15aa0ab · sha256:f83beba8dd0ba5e9… · /containers/cna/problemTypes/1/descriptions/0
{"cweId":"CWE-269","description":"CWE-269: Improper Privilege Management","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:9888f49fdb9f2b9c108517fadbcdb37e7b5943d7dc56934f7a6de7f6c15aa0ab · sha256:f83beba8dd0ba5e9… · /containers/cna/problemTypes/0/descriptions/0

Source references

3 source assertions
{"name":"https://github.com/open-webui/open-webui/commit/96a0b3239b1aadb23fc359bf10849c9ba12fd6ec","tags":["x_refsource_MISC"],"url":"https://github.com/open-webui/open-webui/commit/96a0b3239b1aadb23fc359bf10849c9ba12fd6ec"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:9888f49fdb9f2b9c108517fadbcdb37e7b5943d7dc56934f7a6de7f6c15aa0ab · sha256:f83beba8dd0ba5e9… · /containers/cna/references/2
{"name":"https://github.com/open-webui/open-webui/pull/23626","tags":["x_refsource_MISC"],"url":"https://github.com/open-webui/open-webui/pull/23626"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:9888f49fdb9f2b9c108517fadbcdb37e7b5943d7dc56934f7a6de7f6c15aa0ab · sha256:f83beba8dd0ba5e9… · /containers/cna/references/1
{"name":"https://github.com/open-webui/open-webui/security/advisories/GHSA-h3ww-q6xx-w7x3","tags":["x_refsource_CONFIRM"],"url":"https://github.com/open-webui/open-webui/security/advisories/GHSA-h3ww-q6xx-w7x3"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:9888f49fdb9f2b9c108517fadbcdb37e7b5943d7dc56934f7a6de7f6c15aa0ab · sha256:f83beba8dd0ba5e9… · /containers/cna/references/0

Attribution and limitations

  • CVE Program CVEList V5: Reproduce the MITRE copyright designation and CVE license in copies. Source →

Provider severity values are preserved separately. Baitaphish does not convert them into a risk rating, infer affected products, or treat EPSS as observed exploitation.

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