EUVD-2026-53769
GHSA-w22m-c8rq-w42r
Severity by source
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P/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:X
Network-accessible endpoint requires no authentication (AV:N, PR:N) and no interaction; impact is uniformly low across CIA with no scope change beyond the vulnerable component.
Primary rating from Vendor (VulDB).
CVSS VectorVendor: VulDB
Lifecycle Timeline
3DescriptionCVE.org
A security vulnerability has been detected in TinyAGI 0.0.20. Impacted is the function processMessage of the file packages/main/src/index.ts of the component Message API Endpoint. Such manipulation leads to missing authorization. The attack can be launched remotely. The exploit has been disclosed publicly and may be used. The project was informed of the problem early through an issue report but has not responded yet.
AnalysisAI
Missing authorization in TinyAGI 0.0.20's Message API Endpoint allows remote unauthenticated attackers to invoke the processMessage function without any access control enforcement, yielding limited but real confidentiality, integrity, and availability impact. A publicly available proof-of-concept exploit is referenced in GitHub issue #284, and the project maintainer has not responded to the responsible disclosure, leaving no patch available at time of analysis. The combination of unauthenticated network exploitability, live POC, and vendor silence makes this a material risk for any deployment exposing the endpoint to untrusted networks.
Technical ContextAI
TinyAGI is a lightweight AI agent framework. The vulnerable component is the processMessage function in packages/main/src/index.ts, which handles the Message API Endpoint. CWE-862 (Missing Authorization) indicates the code executes sensitive message processing operations without verifying that the caller holds any required permission or role - a structural omission rather than a bypassed check. The CVSS 4.0 base vector (AV:N/AC:L/AT:N/PR:N/UI:N) confirms the endpoint is reachable over the network with no authentication requirement and no special attack conditions needed. The CPE string cpe:2.3:a:n/a:tinyagi:*:*:*:*:*:*:*:* lists the vendor field as 'n/a', consistent with a small community project lacking a formal vendor identity in the NVD.
RemediationAI
No vendor-released patch has been identified at time of analysis - the project maintainer has not responded to the responsible disclosure submitted via GitHub issue #284 (https://github.com/TinyAGI/tinyagi/issues/284). As a primary compensating control, restrict network access to the TinyAGI Message API Endpoint using a firewall rule or reverse proxy that enforces authentication before traffic reaches the processMessage handler; placing the instance behind a VPN or authenticated API gateway prevents unauthenticated external access with minimal functionality loss for internal users. If the Message API Endpoint is not required in the current deployment, disabling it entirely eliminates the attack surface without side effects. Monitor the GitHub repository (https://github.com/TinyAGI/tinyagi/) and VulDB advisory (https://vuldb.com/vuln/386403) for any upstream patch releases. Do not expose TinyAGI 0.0.20 instances to untrusted networks until an official fix is available.
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Same weakness CWE-862 – Missing Authorization
View allSame technique Authentication Bypass
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External POC / Exploit Code
Leaving vuln.today