CVE-2026-45667 json
Open WebUI: Unauthenticated endpoint can trigger embedding generation (cost/DoS)
published 2026-05-14 5 mo ago modified 2026-07-13 3 mo ago also GHSA-m69w-p7m4-585j , PYSEC-2026-2747 , EUVD-2026-30665
- cvss
- 6.5
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.3%
- EPSS 0.3% chance of exploitation in 30 days, percentile 27%
- public exploits
- 0
- none known
Summary
Open WebUI is a self-hosted artificial intelligence platform designed to operate entirely offline. Prior to 0.8.0, GET /api/v1/memories/ef is accessible without authentication and executes request.app.state.EMBEDDING_FUNCTION(...). This allows any unauthenticated caller to trigger embedding generation which can lead to direct cost exposure if a paid provider is used. This vulnerability is fixed in 0.8.0.
Patch / fix
- pypi open-webui 0.8.0
- openwebui open_webui 0.8.0
CISA SSVC
- Exploitation
- Proof of concept is public
- Automatable
- yes
- Technical impact
- partial
- Assessed
- 5 mo ago
Exploit prediction
0.34% chance of exploitation in the next 30 days, higher than 27% of all scored CVEs (FIRST EPSS, 2026-11-08).
Exploits and checks
- github.com https://github.com/open-webui/open-webui/security/advisories/GHSA-m69w-p7m4-585j referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 6.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L |
| OSV | 3.1 | 6.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L |
| GitHub | 3.1 | 6.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| pypi | open-webui | <0.8.0 |
0.8.0 |
Affected products
- open-webui open-webui
Classification
- Weakness
-
- CWE-862 Missing Authorization
References
-
github.com
/open-webui/open-webui/security/advisories/GHSA-m69w-p7m4-585j
exploit, web, patch, vendor-advisory
-
github.com
/open-webui/open-webui/commit/e5035ea31e179977e805a7032c979ff59a71860a
web
-
nvd.nist.gov
/vuln/detail/CVE-2026-45667
advisory
-
github.com
/open-webui/open-webui
package
-
github.com
/open-webui/open-webui/releases/tag/v0.8.0
web
-
pypi.org
/project/open-webui
package
-
github.com
/advisories/GHSA-m69w-p7m4-585j
advisory
Sources
- CVE List CVE-2026-45667
- GitHub Advisory GHSA-m69w-p7m4-585j
- NVD CVE-2026-45667
- OSV PYSEC-2026-2747
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