CVE-2026-41488: CWE-918: Server-Side Request Forgery (SSRF) in langchain-ai langchain-openai
CVE-2026-41488 is a Server-Side Request Forgery (SSRF) vulnerability in the langchain-openai component of the LangChain framework prior to version 1. 1. 14. The vulnerability arises from a time-of-check to time-of-use (TOCTOU) issue where URL validation and the actual network fetch use separate DNS resolutions, allowing an attacker to manipulate DNS responses to redirect requests to internal or localhost IPs after validation. The CVSS score is 3. 1, indicating low severity, with limited impact on confidentiality and no impact on integrity or availability. No official patch or remediation guidance has been published yet, and no known exploits are reported in the wild. The affected versions are those before 1. 1. 14.
AI Analysis
Technical Summary
LangChain's langchain-openai package versions prior to 1.1.14 contain an SSRF vulnerability (CWE-918) due to a TOCTOU race condition in the _url_to_size() helper function. This function validates URLs to prevent SSRF but performs the actual fetch in a separate network operation with independent DNS resolution. An attacker can exploit this by controlling DNS responses to resolve a hostname to a public IP during validation and then to a private or localhost IP during the fetch, potentially causing the server to make unintended internal network requests. The vulnerability has a CVSS 3.1 base score of 3.1 (low severity). No official remediation level or patch is currently documented.
Potential Impact
The vulnerability allows an attacker to potentially induce the server to make requests to internal or localhost IP addresses by exploiting DNS rebinding during the time window between URL validation and fetching. This could lead to limited information disclosure or interaction with internal services accessible from the server. The CVSS vector indicates no impact on integrity or availability and only low impact on confidentiality. There are no known exploits in the wild at this time.
Mitigation Recommendations
No official patch or remediation guidance is currently available. Users should upgrade to langchain-openai version 1.1.14 or later once it is released, as versions prior to 1.1.14 are affected. Until a fix is available, cautious use of the _url_to_size() function and restricting network access from the server to trusted endpoints may reduce risk. Monitor the vendor advisory for updates on official fixes or mitigations.
CVE-2026-41488: CWE-918: Server-Side Request Forgery (SSRF) in langchain-ai langchain-openai
Description
CVE-2026-41488 is a Server-Side Request Forgery (SSRF) vulnerability in the langchain-openai component of the LangChain framework prior to version 1. 1. 14. The vulnerability arises from a time-of-check to time-of-use (TOCTOU) issue where URL validation and the actual network fetch use separate DNS resolutions, allowing an attacker to manipulate DNS responses to redirect requests to internal or localhost IPs after validation. The CVSS score is 3. 1, indicating low severity, with limited impact on confidentiality and no impact on integrity or availability. No official patch or remediation guidance has been published yet, and no known exploits are reported in the wild. The affected versions are those before 1. 1. 14.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
LangChain's langchain-openai package versions prior to 1.1.14 contain an SSRF vulnerability (CWE-918) due to a TOCTOU race condition in the _url_to_size() helper function. This function validates URLs to prevent SSRF but performs the actual fetch in a separate network operation with independent DNS resolution. An attacker can exploit this by controlling DNS responses to resolve a hostname to a public IP during validation and then to a private or localhost IP during the fetch, potentially causing the server to make unintended internal network requests. The vulnerability has a CVSS 3.1 base score of 3.1 (low severity). No official remediation level or patch is currently documented.
Potential Impact
The vulnerability allows an attacker to potentially induce the server to make requests to internal or localhost IP addresses by exploiting DNS rebinding during the time window between URL validation and fetching. This could lead to limited information disclosure or interaction with internal services accessible from the server. The CVSS vector indicates no impact on integrity or availability and only low impact on confidentiality. There are no known exploits in the wild at this time.
Mitigation Recommendations
No official patch or remediation guidance is currently available. Users should upgrade to langchain-openai version 1.1.14 or later once it is released, as versions prior to 1.1.14 are affected. Until a fix is available, cautious use of the _url_to_size() function and restricting network access from the server to trusted endpoints may reduce risk. Monitor the vendor advisory for updates on official fixes or mitigations.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- GitHub_M
- Date Reserved
- 2026-04-20T16:14:19.007Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 69ebdedf87115cfb68748364
Added to database: 4/24/2026, 9:21:35 PM
Last enriched: 4/24/2026, 9:36:10 PM
Last updated: 4/24/2026, 10:32:21 PM
Views: 3
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