CVE-2026-59218 | THREATINT

Description

Open WebUI is an extensible, feature-rich, and user-friendly self-hosted AI platform. Prior to 0.10.0, the /api/v1/auths/signin endpoint looked users up by email and only ran bcrypt password verification when a credential existed, making registered-account attempts measurably slower than missing-email attempts and allowing unauthenticated account enumeration. This issue is fixed in version 0.10.0.

PUBLISHED Reserved 2026-07-02 | Published 2026-07-09 | Updated 2026-07-09 | Assigner GitHub_M

MEDIUM: 5.3CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

Problem types

CWE-208: Observable Timing Discrepancy

Product status

< 0.10.0

affected

References

github.com/...-webui/security/advisories/GHSA-7rw5-9f7q-xj36

github.com/open-webui/open-webui/pull/26385

github.com/...ommit/993e74912199c66c522f08ec81abe31d76985e39

github.com/open-webui/open-webui/releases/tag/v0.10.0

cve.org (CVE-2026-59218)

nvd.nist.gov (CVE-2026-59218)

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