ag-ui-protocol ag-ui up to 2026-09-07 Middleware filter-tool-calls.ts FilterToolCallsMiddleware cleanup

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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5.2$0-$5k2.78+

Summaryinfo

A vulnerability was found in ag-ui-protocol ag-ui up to 2026-09-07. It has been classified as problematic. This issue affects the function FilterToolCallsMiddleware of the file sdks/typescript/packages/client/src/middleware/filter-tool-calls.ts of the component Middleware. The manipulation leads to cleanup. This vulnerability is referenced as CVE-2026-101100. Remote exploitation of the attack is possible. No exploit is available. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability was found in ag-ui-protocol ag-ui up to 2026-09-07. It has been rated as problematic. This issue affects the function FilterToolCallsMiddleware of the file sdks/typescript/packages/client/src/middleware/filter-tool-calls.ts of the component Middleware. The manipulation with an unknown input leads to a cleanup vulnerability. Using CWE to declare the problem leads to CWE-459. The product does not properly "clean up" and remove temporary or supporting resources after they have been used. Impacted is integrity, and availability.

It is possible to read the advisory at github.com. The identification of this vulnerability is CVE-2026-101100. The exploitation is known to be easy. The attack may be initiated remotely. Technical details of the vulnerability are known, but there is no available exploit.

Upgrading to version 2026-09-08 eliminates this vulnerability. The upgrade is hosted for download at github.com. Applying the patch c346119fe870b70f5c19738ee5119f3e1456e59d is able to eliminate this problem. The bugfix is ready for download at github.com. The best possible mitigation is suggested to be upgrading to the latest version.

Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

Vendor

Name

Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.4
VulDB Meta Temp Score: 5.2

VulDB Base Score: 5.4
VulDB Temp Score: 5.2
VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Cleanup
CWE: CWE-459
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined
Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: ag-ui 2026-09-08
Patch: c346119fe870b70f5c19738ee5119f3e1456e59d

Timelineinfo

09/08/2026 Countermeasure disclosed
09/28/2026 +20 days Advisory disclosed
09/28/2026 +0 days VulDB entry created
09/28/2026 +0 days VulDB entry last update

Sourcesinfo

Product: github.com

Advisory: 2443
Status: Confirmed
Confirmation: 🔒

CVE: CVE-2026-101100 (🔒)
GCVE (CVE): GCVE-0-2026-101100
GCVE (VulDB): GCVE-100-410975

Entryinfo

Created: 09/28/2026 04:58
Changes: 09/28/2026 04:58 (61)
Complete: 🔍
Submitter: meraklbz
Cache ID: 216::103

Submitinfo

Accepted

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