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CVE-2026-101100

ag-ui-protocol ag-ui Middleware filter-tool-calls.ts FilterToolCallsMiddleware cleanup

CVSS score

5.3

EPSS probability

%0.3

Risk score

0.0

Published

13 d ago

OverviewPublic Exploits (0)NewsroomVulnerability Timeline
Official patch verified

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Vulnerability description

DayBreach CVE AI Research

CVE-2026-101100 has vendor, distribution, patch and security-source records on file. We can compare them and prepare an explanation linked to the evidence.

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.

IMPACT: Affected Products and Software

Affected Products

The following products are affected by CVE-2026-101100 vulnerability. Where our threat engine knows the exact affected versions, they are listed below.

IDVENDORPRODUCTACTION
1ag-ui-protocolag-ui View
Total affected vendors: 1|Products: 1

RED HAT CSAF/VEX: Product Impact Check

Red Hat has not yet published a CSAF/VEX impact record for this CVE. This does not mean “not affected”.

SCORING: CVSS from Multiple Sources

CVSS Scores

The Common Vulnerability Scoring System is a standardised framework for assessing the severity of vulnerabilities in software and systems. We collect and display CVSS scores from several sources for each CVE.

SCOREVERSIONSEVERITYVECTORSOURCE
5.5CVSS V2_0—AV:N/AC:L/Au:S/C:N/I:P/A:P/E:ND/RL:OF/RC:CCVE CNA
5.5CVSS V2—AV:N/AC:L/Au:S/C:N/I:P/A:PNVD
5.4CVSS V3_1MEDIUMCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L/E:X/RL:O/RC:CCVE CNA
5.4CVSS V3_0MEDIUMCVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L/E:X/RL:O/RC:CCVE CNA
5.4CVSS V31MEDIUMCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:LNVD
5.3CVSS V4_0MEDIUMCVSS: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:XCVE CNA
5.3CVSS V40MEDIUMCVSS: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/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:XNVD

Patch and Remediation Guide

Solution & Remediation Advisory

Patch verified

6 doğrulanmış yama veya düzeltilmiş sürüm kanıtı bulundu.

cvelist

CNA çözüm referansı

Open source
cvelist

CNA çözüm referansı

Open source
cvelist

CNA çözüm referansı

Open source
reference

Yama veya çözüm referansı

Open source
reference

Yama veya çözüm referansı

Open source
reference

Yama veya çözüm referansı

Open source
Confirm the affected product and version against the source evidence above.
Restrict access to internet-facing services and apply network segmentation.
Apply the official update named in the evidence only to the matching product and version.
Monitor server logs and network endpoints for signs of anomalous execution.

Public exploit and active exploitation status

Verified exploit intelligence

No verified public PoC, exploit repository or Metasploit module has been found for this CVE yet.

Weakness Classification and Attack Patterns (CWE & CAPEC)

CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorises the common flaws or weaknesses that can lead to vulnerabilities. CVE-2026-101100 is associated with the following CWEs:

CWE-459: Common Weakness Enumeration Entry CWE-459

Common Attack Pattern Enumeration and Classification (CAPEC)

Common Attack Pattern Enumeration and Classification (CAPEC) stores attack patterns, which are descriptions of the common attributes and approaches employed by adversaries to exploit the CVE-2026-101100 weaknesses.

CAPEC-66: SQL InjectionCAPEC-126: Path TraversalCAPEC-28: OS Command Injection

Attack Vector and Accessibility

ExposureAğ üzerinden
PermissionsLow
UserGerekmiyor

Official Sources and Advisories

VDB-410975 | ag-ui-protocol ag-ui Middleware filter-tool-calls.ts FilterToolCallsMiddleware cleanupvendor-advisoryVDB-410975 | CTI Indicators (IOB, IOC, IOA)vendor-advisoryCVE-2026-101100 | CVE Analysis and Reportvendor-advisorySubmit #934980 | ag-ui-protocol ag-ui v1.0 CWE-459vendor-advisoryhttps://github.com/ag-ui-protocol/ag-ui/issues/2443vendor-advisoryhttps://github.com/ag-ui-protocol/ag-ui/pull/2494patchhttps://github.com/ag-ui-protocol/ag-ui/commit/c346119fe870b70f5c19738ee5119f3e1456e59dpatchhttps://github.com/ag-ui-protocol/ag-ui/releases/tag/release/2026-09-08patchhttps://github.com/ag-ui-protocol/ag-ui/vendor-advisory

CVSS Vector Radar Chart

5.3 / 10
Attack VectorNetworkComplexityLowPrivilegesLowUser Interact.NoneConfidentialityLowIntegrityNoneAvailabilityLow

Vulnerability Scoring Details

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
Attack VectorNetwork
Attack ComplexityLow
Privileges RequiredLow privileges
User InteractionNone required
Confidentiality (Gizlilik)Low
Integrity (Bütünlük)None
Availability (Erişilebilirlik)Low

Yama doğrulandı

6 doğrulanmış yama veya düzeltilmiş sürüm kanıtı bulundu.

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Weakness Type (CWE & CAPEC)

CWE-459

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