CVE-2026-101100ag-ui-protocol ag-ui Middleware filter-tool-calls.ts FilterToolCallsMiddleware cleanup
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No exploitation reported and no EPSS estimate yet.
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A flaw has been found in ag-ui-protocol ag-ui up to 2026-09-07. This vulnerability affects the function FilterToolCallsMiddleware of the file sdks/typescript/packages/client/src/middleware/filter-tool-calls.ts of the component Middleware. Executing a manipulation can lead to incomplete cleanup. The attack may be launched remotely. Upgrading to version 2026-09-08 is able to resolve this issue. This patch is called c346119fe870b70f5c19738ee5119f3e1456e59d. It is suggested to upgrade the affected component.
- CVSS
- 5.4 MEDIUM (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L/E:X/RL:O/RC:C
- Weakness (CWE)
- CWE-459
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- VulDB
- NVD analysis
- Deferred
- Record last updated
- Sep 28, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
ag-ui-protocol ag-ui ag-ui-protocol:ag-ui | 2026-09-07; 2026-09-08 not affected | CNA record |
References
- https://vuldb.com/vuln/410975vdb-entry, technical-description
- https://vuldb.com/vuln/410975/ctisignature, permissions-required
- https://vuldb.com/cve/CVE-2026-101100third-party-advisory
- https://vuldb.com/submit/934980third-party-advisory
- https://github.com/ag-ui-protocol/ag-ui/issues/2443issue-tracking
- https://github.com/ag-ui-protocol/ag-ui/pull/2494issue-tracking, patch
- https://github.com/ag-ui-protocol/ag-ui/commit/c346119fe870b70f5c19738ee5119f3e1456e59dpatch
- https://github.com/ag-ui-protocol/ag-ui/releases/tag/release/2026-09-08patch
- https://github.com/ag-ui-protocol/ag-ui/product
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.