ag-ui-protocol ag-ui Middleware filter-tool-calls.ts FilterToolCallsMiddleware cleanup
Published Sep 28, 2026
5.3
MEDIUMCVSS 4.0
EPSS 0.30%
Description
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.
Affected products
-
- Version 2026-09-07StatusaffectedConstraints-
- Version 2026-09-08StatusunaffectedConstraints-
- Version
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
| Vendor | Product | Default status | Versions | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| AG-UI-Protocol | AG-UI | n/a |
|
No data.
No data.
No Red Hat product state for this CVE.
No package ranges for this CVE.
Remediation
No remediation recorded yet.
Metrics
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N/E:X
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
CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L/E:X/RL:O/RC:C
AV:N/AC:L/Au:S/C:N/I:P/A:P/E:ND/RL:OF/RC:C
This CVE is not in the KEV list.
CISA SSVC (Vulnrichment)
Stakeholder-Specific Vulnerability Categorization from CISA ADP.
Exploitation
NoneAutomatable
NoTechnical Impact
PartialDecision
n/aAssessed Sep 28, 2026 · SSVC 2.0.3
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 3, 2026.
Score over time
Oct 2026- EPSS v5
Percentile over time
- EPSS v5
Table of values (2 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 3, 2026 | 0.30% (0.00299) | 20.54th | v5 (v2026.06.15) |
| Oct 1, 2026 | 0.30% (0.00299) | 20.43th | v5 (v2026.06.15) |
References (9)
- https://github.com/ag-ui-protocol/ag-ui/ product
- https://github.com/ag-ui-protocol/ag-ui/commit/c346119fe870b70f5c19738ee5119f3e1456e59d patch
- https://github.com/ag-ui-protocol/ag-ui/issues/2443 issue-tracking
- https://github.com/ag-ui-protocol/ag-ui/pull/2494 issue-trackingpatch
- https://github.com/ag-ui-protocol/ag-ui/releases/tag/release/2026-09-08 patch
- https://vuldb.com/cve/CVE-2026-101100 third-party-advisory
- https://vuldb.com/submit/934980 third-party-advisory
- https://vuldb.com/vuln/410975 vdb-entrytechnical-description
- https://vuldb.com/vuln/410975/cti signaturepermissions-required
| Link | Providers | Tags |
|---|---|---|
| https://github.com/ag-ui-protocol/ag-ui/ | product | |
| https://github.com/ag-ui-protocol/ag-ui/commit/c346119fe870b70f5c19738ee5119f3e1456e59d | patch | |
| https://github.com/ag-ui-protocol/ag-ui/issues/2443 | issue-tracking | |
| https://github.com/ag-ui-protocol/ag-ui/pull/2494 | issue-trackingpatch | |
| https://github.com/ag-ui-protocol/ag-ui/releases/tag/release/2026-09-08 | patch | |
| https://vuldb.com/cve/CVE-2026-101100 | third-party-advisory | |
| https://vuldb.com/submit/934980 | third-party-advisory | |
| https://vuldb.com/vuln/410975 | vdb-entrytechnical-description | |
| https://vuldb.com/vuln/410975/cti | signaturepermissions-required |
Change history (0)
No recorded changes yet.