CVE-2026-42260: CWE-918: Server-Side Request Forgery (SSRF) in Aas-ee open-webSearch
Open-WebSearch is a multi-engine MCP server, CLI, and local daemon for agent web search and content retrieval. Prior to 2.1.7, isPublicHttpUrl / assertPublicHttpUrl in src/utils/urlSafety.ts do not recognize bracketed IPv6 literals and do not resolve DNS, which combine to allow non-blind SSRF with the response body returned to the caller. This vulnerability is fixed in 2.1.7.
AI Analysis
Technical Summary
Open-WebSearch versions before 2.1.7 contain an SSRF vulnerability (CWE-918) due to improper validation in URL safety functions (isPublicHttpUrl and assertPublicHttpUrl). These functions do not recognize bracketed IPv6 literals and do not perform DNS resolution, which allows attackers to craft requests that the server will fetch and return the response body to the attacker. This enables non-blind SSRF attacks, potentially exposing internal resources or sensitive data. The vulnerability is addressed in version 2.1.7 of open-webSearch.
Potential Impact
Successful exploitation of this SSRF vulnerability can lead to unauthorized access to internal or protected network resources by making the server perform arbitrary HTTP requests. The attacker can receive the response body, increasing the risk of data exposure. The CVSS score of 8.2 indicates high impact on confidentiality with limited impact on integrity and no impact on availability. No known active exploitation has been reported.
Mitigation Recommendations
Upgrade open-webSearch to version 2.1.7 or later, where the vulnerability is fixed. Since the product is not a cloud service and no other remediation level is provided, applying this official fix is the recommended action. Patch status is confirmed by the vendor advisory stating the issue is fixed in 2.1.7.
CVE-2026-42260: CWE-918: Server-Side Request Forgery (SSRF) in Aas-ee open-webSearch
Description
Open-WebSearch is a multi-engine MCP server, CLI, and local daemon for agent web search and content retrieval. Prior to 2.1.7, isPublicHttpUrl / assertPublicHttpUrl in src/utils/urlSafety.ts do not recognize bracketed IPv6 literals and do not resolve DNS, which combine to allow non-blind SSRF with the response body returned to the caller. This vulnerability is fixed in 2.1.7.
CVSS v3.1
Score 8.2high
Affected software
pkg:github/aas-ee/open-webSearchRun on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
Open-WebSearch versions before 2.1.7 contain an SSRF vulnerability (CWE-918) due to improper validation in URL safety functions (isPublicHttpUrl and assertPublicHttpUrl). These functions do not recognize bracketed IPv6 literals and do not perform DNS resolution, which allows attackers to craft requests that the server will fetch and return the response body to the attacker. This enables non-blind SSRF attacks, potentially exposing internal resources or sensitive data. The vulnerability is addressed in version 2.1.7 of open-webSearch.
Potential Impact
Successful exploitation of this SSRF vulnerability can lead to unauthorized access to internal or protected network resources by making the server perform arbitrary HTTP requests. The attacker can receive the response body, increasing the risk of data exposure. The CVSS score of 8.2 indicates high impact on confidentiality with limited impact on integrity and no impact on availability. No known active exploitation has been reported.
Mitigation Recommendations
Upgrade open-webSearch to version 2.1.7 or later, where the vulnerability is fixed. Since the product is not a cloud service and no other remediation level is provided, applying this official fix is the recommended action. Patch status is confirmed by the vendor advisory stating the issue is fixed in 2.1.7.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- GitHub_M
- Date Reserved
- 2026-04-26T11:53:27.705Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a0341f2cbff5d8610f8ff83
Added to database: 05/12/2026, 15:06:26 UTC
Last enriched: 05/19/2026, 18:28:12 UTC
Last updated: 07/31/2026, 19:22:58 UTC
Views: 49
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