Vulnerability in Ag-Ui-Protocol Ag-Ui
CVE-2026-92359
A security flaw has been discovered in ag-ui-protocol ag-ui 0.3.0. The affected element is the function create_strands_app of the file integrations/aws-strands/python/src/ag_ui_strands/utils.py of the component CORSMiddleware. The manipulation results in permissive cross-domain policy with untrusted domains. The attack may be launched remotely. The attack requires a high level of complexity. The exploitability is described as difficult. Upgrading to version AGUI.Abstractions@0.0.6 is sufficient to fix this issue. The patch is identified as 9b143b9668fa52c2054ede9d34a45ac4b4401089. It is suggested to upgrade the affected component.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 3.1 (Low). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:N/A:N.
EPSS exploit prediction
EPSS: 0.003 (19.8th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 20th percentile — 19.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.003 · newest: 0.003 · change: 0.000
Affected products
- Ag-Ui-Protocol Ag-Ui — versions 0.3.0
Weakness classification (CWE)
References
- vuldb.com/vuln/405445 (technical-description, vdb-entry)
- vuldb.com/vuln/405445/cti (signature, permissions-required)
- vuldb.com/cve/CVE-2026-92359 (third-party-advisory)
- vuldb.com/submit/934120 (third-party-advisory)
- github.com/ag-ui-protocol/ag-ui/issues/2433 (issue-tracking)
- github.com/ag-ui-protocol/ag-ui/pull/2492 (issue-tracking, patch)
- github.com/ag-ui-protocol/ag-ui/commit/9b143b9668fa52c2054ede9d34a45ac4b4401089 (patch)
- github.com/ag-ui-protocol/ag-ui/releases/tag/AGUI.Abstractions@0.0.6 (patch)
- github.com/ag-ui-protocol/ag-ui/ (product)
Frequently asked questions
- What is CVE-2026-92359?
- CVE-2026-92359 is a low-severity vulnerability in Ag-Ui-Protocol Ag-Ui, classified under Origin Validation Error. CVSS score: 3.1/10. Published 2026-09-16.
- How severe is CVE-2026-92359?
- Low severity. CVSS v3 base score is 3.1 out of 10.