CVE-2026-59218 json
Open WebUI: Account enumeration via observable login timing discrepancy
published 2026-07-09 4 mo ago modified 2026-08-04 3 mo ago also GHSA-7rw5-9f7q-xj36 , PYSEC-2026-3594 , EUVD-2026-42617
- cvss
- 5.3
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.4%
- EPSS 0.4% chance of exploitation in 30 days, percentile 35%
- public exploits
- 0
- none known
Summary
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.
Patch / fix
- pypi open-webui 0.10.0
- openwebui open_webui 0.10.0
CISA SSVC
- Exploitation
- none
- Automatable
- yes
- Technical impact
- partial
- Assessed
- 4 mo ago
Exploit prediction
0.41% chance of exploitation in the next 30 days, higher than 35% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 5.3 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N |
| GitHub | 3.1 | 5.3 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N |
| OSV | 3.1 | 5.3 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| pypi | open-webui | <0.10.0 |
0.10.0 |
Affected products
- open-webui open-webui
Classification
- Weakness
-
- CWE-208 Observable Timing Discrepancy
References
-
github.com
/open-webui/open-webui/pull/26385
web, issue-tracking, patch
-
github.com
/open-webui/open-webui/commit/993e74912199c66c522f08ec81abe31d76985e39
web, patch
-
github.com
/open-webui/open-webui/security/advisories/GHSA-7rw5-9f7q-xj36
web, vendor-advisory
-
github.com
/open-webui/open-webui/releases/tag/v0.10.0
web, product, release-notes
-
nvd.nist.gov
/vuln/detail/CVE-2026-59218
advisory
-
github.com
/open-webui/open-webui
package
-
pypi.org
/project/open-webui
package
-
github.com
/advisories/GHSA-7rw5-9f7q-xj36
advisory
Sources
- CVE List CVE-2026-59218
- GitHub Advisory GHSA-7rw5-9f7q-xj36
- NVD CVE-2026-59218
- OSV PYSEC-2026-3594
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