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 [email protected] is sufficient to fix this issue. The patch is identified as 9b143b9668fa52c2054ede9d34a45ac4b4401089. It is suggested to upgrade the affected component.
CVE-2026-92359
LOWPre-NVD 3.13.1—Trending — 4 sources updated this week
EchelonGraph scoreHIGH confidence
Score 3.1 from GitHub Security Advisory (severity: LOW) published 2026-09-16. a secondary CVSS source baseline 3.1; sources differ by 0.0.
Triggered by: GitHub Security Advisory CVSS
Sources: ghsa, secondary
3.1EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
- Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 3.1Exploit: None knownExposed: 0
No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.
- CVSS v3
- 3.1
- EG Score
- 3.1(high)
- EG Risk
- 18(Track)EG Risk 18/100SSVC: Track
EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).
How it’s computedSeverity31% × 45%Exploitation0% × 40%Automatability30% × 15%Action: Routine — remediate on your standard cadence. - EPSS PROB
- 0%
- EPSS %ILE
- 14%
- KEV
- Not listed
Published
September 16, 2026
Last Modified
September 16, 2026
References (9)
- cna@vuldbhttps://github.com/ag-ui-protocol/ag-ui/
- cna@vuldbhttps://github.com/ag-ui-protocol/ag-ui/commit/9b143b9668fa52c2054ede9d34a45ac4b4401089
- cna@vuldbhttps://github.com/ag-ui-protocol/ag-ui/issues/2433
- cna@vuldbhttps://github.com/ag-ui-protocol/ag-ui/pull/2492
- cna@vuldbhttps://github.com/ag-ui-protocol/ag-ui/releases/tag/AGUI.Abstractions%400.0.6
- cna@vuldbhttps://vuldb.com/cve/CVE-2026-92359
- cna@vuldbhttps://vuldb.com/submit/934120
- cna@vuldbhttps://vuldb.com/vuln/405445
- cna@vuldbhttps://vuldb.com/vuln/405445/cti
Vendor Advisories for CVE-2026-92359(1)
These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.
Weakness Classification(2)
MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.
Data Freshness Timeline
(refreshed 7× in last 7d / 7× in last 30d)
Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.
- 2026-09-18 19:28 UTCEPSS rescore
- 2026-09-17 19:32 UTCEPSS rescore
- 2026-09-16 18:04 UTCEG score recompute
- 2026-09-16 18:04 UTCGHSA enrichment
- 2026-09-16 13:36 UTCEG score recompute
- 2026-09-16 12:20 UTCEG score recompute
- 2026-09-16 12:20 UTCMITRE cvelistV5first tracked
Frequently asked(5)
What is CVE-2026-92359?
CVE-2026-92359 is a low vulnerability published on September 16, 2026. A security flaw has been discovered in ag-ui-protocol ag-ui 0.3.0. The affected element is the function createstrandsapp of the file integrations/aws-strands/python/src/aguistrands/utils.py of the component CORSMiddleware. The manipulation results in permissive cross-domain policy with untrusted…
When was CVE-2026-92359 disclosed?
CVE-2026-92359 was first published in the National Vulnerability Database on September 16, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-92359 actively exploited?
CVE-2026-92359 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 86.1% of all scored CVEs.
What is the CVSS score of CVE-2026-92359?
CVE-2026-92359 has a CVSS v3 base score of 3.1 (NVD).
How do I remediate CVE-2026-92359?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-92359, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.
Dependency Blast Radius
Explore the affected products and dependency analysis for CVE-2026-92359
Is Your Infrastructure Affected by CVE-2026-92359?
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