CVE-2026-120236

ag-ui-protocol ag-ui Transport Decoder input validation

Published Nov 1, 2026 CVSS 4.0 · 5.3 Medium EPSS < 1% KEV · Not listed

Description

A vulnerability was detected in ag-ui-protocol ag-ui up to 0.0.58. Affected by this vulnerability is an unknown functionality of the component Transport Decoder Handler. The manipulation results in improper input validation. The attack may be launched remotely. The exploit is now public and may be used. The patch is identified as 660182b973a44b8eda5484b14b88eb9cc251edc4. It is suggested to upgrade the affected component.

Affected Products

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

affected

Version	Status	Constraints
`0.0.1`	affected	—
`0.0.2`	affected	—
`0.0.3`	affected	—
`0.0.4`	affected	—
`0.0.5`	affected	—
`0.0.6`	affected	—
`0.0.7`	affected	—
`0.0.8`	affected	—
`0.0.9`	affected	—
`0.0.10`	affected	—
`0.0.11`	affected	—
`0.0.12`	affected	—
`0.0.13`	affected	—
`0.0.14`	affected	—
`0.0.15`	affected	—
`0.0.16`	affected	—
`0.0.17`	affected	—
`0.0.18`	affected	—
`0.0.19`	affected	—
`0.0.20`	affected	—
`0.0.21`	affected	—
`0.0.22`	affected	—
`0.0.23`	affected	—
`0.0.24`	affected	—
`0.0.25`	affected	—
`0.0.26`	affected	—
`0.0.27`	affected	—
`0.0.28`	affected	—
`0.0.29`	affected	—
`0.0.30`	affected	—
`0.0.31`	affected	—
`0.0.32`	affected	—
`0.0.33`	affected	—
`0.0.34`	affected	—
`0.0.35`	affected	—
`0.0.36`	affected	—
`0.0.37`	affected	—
`0.0.38`	affected	—
`0.0.39`	affected	—
`0.0.40`	affected	—
`0.0.41`	affected	—
`0.0.42`	affected	—
`0.0.43`	affected	—
`0.0.44`	affected	—
`0.0.45`	affected	—
`0.0.46`	affected	—
`0.0.47`	affected	—
`0.0.48`	affected	—
`0.0.49`	affected	—
`0.0.50`	affected	—
`0.0.51`	affected	—
`0.0.52`	affected	—
`0.0.53`	affected	—
`0.0.54`	affected	—
`0.0.55`	affected	—
`0.0.56`	affected	—
`0.0.57`	affected	—
`0.0.58`	affected	—

No data.

Vendor Product Versions

Ag-ui-protocol

Ag-ui

Version	Status	Scheme	Platform
`0.0.1`	affected	semver	—
`0.0.2`	affected	semver	—
`0.0.3`	affected	semver	—
`0.0.4`	affected	semver	—
`0.0.5`	affected	semver	—
`0.0.6`	affected	semver	—
`0.0.7`	affected	semver	—
`0.0.8`	affected	semver	—
`0.0.9`	affected	semver	—
`0.0.10`	affected	semver	—
`0.0.11`	affected	semver	—
`0.0.12`	affected	semver	—
`0.0.13`	affected	semver	—
`0.0.14`	affected	semver	—
`0.0.15`	affected	semver	—
`0.0.16`	affected	semver	—
`0.0.17`	affected	semver	—
`0.0.18`	affected	semver	—
`0.0.19`	affected	semver	—
`0.0.20`	affected	semver	—
`0.0.21`	affected	semver	—
`0.0.22`	affected	semver	—
`0.0.23`	affected	semver	—
`0.0.24`	affected	semver	—
`0.0.25`	affected	semver	—
`0.0.26`	affected	semver	—
`0.0.27`	affected	semver	—
`0.0.28`	affected	semver	—
`0.0.29`	affected	semver	—
`0.0.30`	affected	semver	—
`0.0.31`	affected	semver	—
`0.0.32`	affected	semver	—
`0.0.33`	affected	semver	—
`0.0.34`	affected	semver	—
`0.0.35`	affected	semver	—
`0.0.36`	affected	semver	—
`0.0.37`	affected	semver	—
`0.0.38`	affected	semver	—
`0.0.39`	affected	semver	—
`0.0.40`	affected	semver	—
`0.0.41`	affected	semver	—
`0.0.42`	affected	semver	—
`0.0.43`	affected	semver	—
`0.0.44`	affected	semver	—
`0.0.45`	affected	semver	—
`0.0.46`	affected	semver	—
`0.0.47`	affected	semver	—
`0.0.48`	affected	semver	—
`0.0.49`	affected	semver	—
`0.0.50`	affected	semver	—
`0.0.51`	affected	semver	—
`0.0.52`	affected	semver	—
`0.0.53`	affected	semver	—
`0.0.54`	affected	semver	—
`0.0.55`	affected	semver	—
`0.0.56`	affected	semver	—
`0.0.57`	affected	semver	—
`0.0.58`	affected	semver	—

Remediation

No solution or workaround provided in the CVE record

Tracking

Advisories

No advisories available

Metrics

Attack Vector Network

Attack Complexity Low

Privileges Required Low

Attack Requirements None

User Interaction None

Vulnerable System Confidentiality Impact Low

Vulnerable System Integrity Impact Low

Vulnerable System Availability Impact Low

Subsequent System Confidentiality Impact None

Subsequent System Integrity Impact None

Subsequent System Availability Impact None

Attack Vector Network

Attack Complexity Low

Privileges Required Low

Scope Unchanged

Confidentiality Impact Low

Integrity Impact Low

Availability Impact Low

User Interaction None

Attack Vector Network

Attack Complexity Low

Privileges Required Low

Scope Unchanged

Confidentiality Impact Low

Integrity Impact Low

Availability Impact Low

User Interaction None

Access Vector Network

Access Complexity Low

Authentication Single

Confidentiality Impact Partial

Integrity Impact Partial

Availability Impact Partial

This CVE is not in the KEV list.

Exploit prediction score: < 1% (0.267% probability within 30 days)

Exploitation poc

Automatable no

Technical Impact partial

References

Link	Providers
https://github.com/ag-ui-protocol/ag-ui/
https://github.com/ag-ui-protocol/ag-ui/commit/660182b973a44b8eda5484b14b88eb9cc251edc4
https://github.com/ag-ui-protocol/ag-ui/issues/2524
https://github.com/ag-ui-protocol/ag-ui/pull/2774
https://github.com/ag-ui-protocol/ag-ui/releases/tag/release/2026-10-30
https://vuldb.com/cve/CVE-2026-120236
https://vuldb.com/submit/1015178
https://vuldb.com/vuln/429595
https://vuldb.com/vuln/429595/cti

History

Nov 2, 2026 3:30 PM Scoring metrics updated View changes

Type	Values Removed	Values Added
Metrics		ssvc `{'options': {'Automatable': 'no', 'Exploitation': 'poc', 'Technical Impact': 'partial'}, 'version': '2.0.3'}`

Nov 1, 2026 5:00 PM Description updated. Title updated. First appearance in the feed. Weaknesses updated. Affected versions updated. Affected vendors updated. Added references. Scoring metrics updated View changes

Type	Values Removed	Values Added
Description		A vulnerability was detected in ag-ui-protocol ag-ui up to 0.0.58. Affected by this vulnerability is an unknown functionality of the component Transport Decoder Handler. The manipulation results in improper input validation. The attack may be launched remotely. The exploit is now public and may be used. The patch is identified as 660182b973a44b8eda5484b14b88eb9cc251edc4. It is suggested to upgrade the affected component.
Title		ag-ui-protocol ag-ui Transport Decoder input validation
First Time appeared		Ag-ui-protocol Ag-ui-protocol ag-ui
Weaknesses		CWE-20
CPEs		cpe:2.3:a:ag-ui-protocol:ag-ui::::::::
Vendors & Products		Ag-ui-protocol Ag-ui-protocol ag-ui
References		https://github.com/ag-ui-protocol/ag-ui/ https://github.com/ag-ui-protocol/ag-ui/commit/660182b973a44b8eda5484b14b88eb9cc251edc4 https://github.com/ag-ui-protocol/ag-ui/issues/2524 https://github.com/ag-ui-protocol/ag-ui/pull/2774 https://github.com/ag-ui-protocol/ag-ui/releases/tag/release/2026-10-30 https://vuldb.com/cve/CVE-2026-120236 https://vuldb.com/submit/1015178 https://vuldb.com/vuln/429595 https://vuldb.com/vuln/429595/cti
Metrics		cvssV2_0 `{'score': 6.5, 'vector': 'AV:N/AC:L/Au:S/C:P/I:P/A:P/E:POC/RL:OF/RC:C'}` cvssV3_0 `{'score': 6.3, 'vector': 'CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L/E:P/RL:O/RC:C'}` cvssV3_1 `{'score': 6.3, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L/E:P/RL:O/RC:C'}` cvssV4_0 `{'score': 5.3, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P'}`