Overview
The cybersecurity landscape is constantly evolving with new vulnerabilities being discovered. One such critical vulnerability, identified as CVE-2025-46059, has been discovered in langchain-ai v0.3.51. This vulnerability is found in the GmailToolkit component of the software and presents a significant threat to users who might unknowingly execute arbitrary code that can compromise their systems through a maliciously crafted email.
This blog post delves deeper into the particulars of this vulnerability, its potential impact, and the mitigation measures available. It is important for all users and administrators using langchain-ai v0.3.51 to understand the severity and potential repercussions of this vulnerability, as it opens up the system to potential compromise and data leakage.
Vulnerability Summary
CVE ID: CVE-2025-46059
Severity: Critical (9.8 CVSS Score)
Attack Vector: Network
Privileges Required: None
User Interaction: Required
Impact: Potential system compromise or data leakage
Affected Products
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Product | Affected Versions
LangChain-AI | v0.3.51
How the Exploit Works
The exploit takes advantage of an indirect prompt injection vulnerability present in the GmailToolkit component of LangChain’s AI software. An attacker can craft a malicious email which, when processed by the GmailToolkit, can inject unauthorized commands. The vulnerability lies in the way the software handles email content, allowing the execution of arbitrary code introduced through these malicious emails. This potentially gives the attacker unauthorized access to the system.
Conceptual Example Code
Here’s a conceptual example of how the vulnerability could be exploited:
POST /GmailToolkit/processEmail HTTP/1.1
Host: target.example.com
Content-Type: application/json
{
"email_content": "Dear User, <img src='http://malicious-site.com/malicious-script.js'>"
}In this example, the malicious script embedded in the image source could be executed when the email is processed by the GmailToolkit component. This could allow the attacker to perform actions on the system that would otherwise be unauthorized.
Remediation
Affected users are advised to apply the vendor patch immediately to mitigate the vulnerability. In the event that this is not feasible, implementing a Web Application Firewall (WAF) or an Intrusion Detection System (IDS) can provide temporary mitigation. However, these are not long-term solutions and the vendor patch should be applied as soon as it becomes available.
Always ensure to follow LangChain security practices when writing code that interacts with the software to prevent the introduction of security vulnerabilities. This vulnerability is disputed by the supplier as the code-execution issue was introduced by user-written code that does not adhere to the LangChain’s security practices.