CVE-2026-54771 PUBLISHED

Langroid: handle_message() executes user-supplied tool JSON without sender verification

Assigner: GitHub_M
Reserved: 15.06.2026 Published: 09.07.2026 Updated: 10.07.2026

Langroid is a framework for building large-language-model-powered applications. Prior to version 0.65.3, a Langroid application exposing a chat interface to untrusted users may allow direct tool invocation via raw JSON payloads, even when tools are registered with use=False, handle=True. Version 0.65.3 fixes the issue.

Metrics

CVSS 3.1

CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
CVSS Score: 8.1

Attack Vector	Network	Scope	Unchanged
Attack Complexity	Low	Confidentiality Impact	High
Privileges Required	Low	Integrity Impact	High
User Interaction	None	Availability Impact	None

CVSS 3.1

Product Status

Vendor	langroid
Product	langroid
Versions	Version < 0.65.3 is affected

References

https://github.com/langroid/langroid/security/advisories/GHSA-gjgq-w2m6-wr5q

Problem Types

CWE-75: Failure to Sanitize Special Elements into a Different Plane (Special Element Injection) CWE