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CVE-2026-28786

Open WebUI is a self-hosted artificial intelligence platform designed to operate entirely offline. Prior to version 0.8.6, an unsanitized filename field in the speech-to-text transcription endpoint allows any authenticated non-admin user to trigger a `FileNotFoundError` whose message — including the server's absolute `DATA_DIR` path — is returned verbatim in the HTTP 400 response body, confirming information disclosure on all default deployments. Version 0.8.6 patches the issue.
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:d64352b3804b9a2648e73c47a0593557438785c40465a9723cd6e7b82434c798
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-22","description":"CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')","lang":"en","type":"CWE"}

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:403da4979321de367fec9ad271824ae86258b7d35243230b54cc80a6f03306b4 · sha256:f2c1117166eee8d4… · /containers/cna/problemTypes/0/descriptions/0

{"cweId":"CWE-209","description":"CWE-209: Generation of Error Message Containing Sensitive Information","lang":"en","type":"CWE"}

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:403da4979321de367fec9ad271824ae86258b7d35243230b54cc80a6f03306b4 · sha256:f2c1117166eee8d4… · /containers/cna/problemTypes/1/descriptions/0

Affected products and versions

1 source assertion
{"product":"open-webui","vendor":"open-webui","versions":[{"status":"affected","version":"< 0.8.6"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:403da4979321de367fec9ad271824ae86258b7d35243230b54cc80a6f03306b4 · sha256:f2c1117166eee8d4… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion
{"metric":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":4.3,"baseSeverity":"MEDIUM","confidentialityImpact":"LOW","integrityImpact":"NONE","privilegesRequired":"LOW","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N","version":"3.1"},"metric_type":"cvssV3_1"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:403da4979321de367fec9ad271824ae86258b7d35243230b54cc80a6f03306b4 · sha256:f2c1117166eee8d4… · /containers/cna/metrics/0/cvssV3_1

CWE assertions

2 source assertions
{"cweId":"CWE-22","description":"CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:403da4979321de367fec9ad271824ae86258b7d35243230b54cc80a6f03306b4 · sha256:f2c1117166eee8d4… · /containers/cna/problemTypes/0/descriptions/0
{"cweId":"CWE-209","description":"CWE-209: Generation of Error Message Containing Sensitive Information","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:403da4979321de367fec9ad271824ae86258b7d35243230b54cc80a6f03306b4 · sha256:f2c1117166eee8d4… · /containers/cna/problemTypes/1/descriptions/0

Source references

2 source assertions
{"name":"https://github.com/open-webui/open-webui/security/advisories/GHSA-vvxm-vxmr-624h","tags":["x_refsource_CONFIRM"],"url":"https://github.com/open-webui/open-webui/security/advisories/GHSA-vvxm-vxmr-624h"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:403da4979321de367fec9ad271824ae86258b7d35243230b54cc80a6f03306b4 · sha256:f2c1117166eee8d4… · /containers/cna/references/0
{"tags":["exploit"],"url":"https://github.com/open-webui/open-webui/security/advisories/GHSA-vvxm-vxmr-624h"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:403da4979321de367fec9ad271824ae86258b7d35243230b54cc80a6f03306b4 · sha256:f2c1117166eee8d4… · /containers/adp/0/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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