CVE-2026-59218 | Open WebUI is an extensible, feature-rich, and user-friendly… | CVSS 5.3 MEDIUM

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.

Metadata

CVE ID: CVE-2026-59218
State: PUBLISHED
Assigner: GitHub_M
Reserved: 2026-07-02 21:05 UTC
Published: 2026-07-09 15:53 UTC
Last updated: 2026-07-09 17:50 UTC
Primary CWE: CWE-208
CWE-208: Observable Timing Discrepancy
Vendor / Product: open-webui / open-webui
Sources: cve.org · NVD

Severity & Metrics

5.3 MEDIUM CVSS 3.1

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

SSVC — CISA Coordinator

Exploitation: none
Automatable: yes
Tech. Impact: partial

Affected products (1)

Vendor	Product	Platform	Versions
open-webui	open-webui	—	< 0.10.0

Weakness (CWE)

CWE	Source	Description
CWE-208	cna	CWE-208: Observable Timing Discrepancy

CVSS scores (1)

Score	Severity	Version	Source	Vector
5.3	MEDIUM	3.1	cna	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

References (4)

https://github.com/open-webui/open-webui/security/advisories/GHSA-7rw5-9f7q-xj36 https://github.com/open-webui/open-webui/security/advisories/GHSA-7rw5-9f7q-xj36
https://github.com/open-webui/open-webui/pull/26385 https://github.com/open-webui/open-webui/pull/26385
https://github.com/open-webui/open-webui/commit/993e74912199c66c522f08ec81abe31d76985e39 https://github.com/open-webui/open-webui/commit/993e74912199c66c522f08ec81abe31d76985e39
https://github.com/open-webui/open-webui/releases/tag/v0.10.0 https://github.com/open-webui/open-webui/releases/tag/v0.10.0