What’s Vulnerable › Vulnerabilities

CVE-2026-92359: ag-ui-protocol ag-ui CORSMiddleware utils.py create_strands_app cross-domain policy

• Severity: low (CVSS 3.1 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-09-16 · updated 2026-09-23
• Weakness: CWE-346

Description

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.

Affected products

• ag-ui-protocol ag-ui: 0.3.0

References

• https://github.com/ag-ui-protocol/ag-ui/
• https://github.com/ag-ui-protocol/ag-ui/commit/9b143b9668fa52c2054ede9d34a45ac4b4401089
• https://github.com/ag-ui-protocol/ag-ui/issues/2433
• https://github.com/ag-ui-protocol/ag-ui/pull/2492
• https://github.com/ag-ui-protocol/ag-ui/releases/tag/AGUI.Abstractions%400.0.6
• https://vuldb.com/cve/CVE-2026-92359
• https://vuldb.com/submit/934120
• https://vuldb.com/vuln/405445
• https://vuldb.com/vuln/405445/cti

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