PatchSiren cyber security CVE debrief
CVE-2026-65056 mzxrai CVE debrief
The mcp-webresearch package, version 0.1.7, is vulnerable to a server-side request forgery (SSRF) attack. This vulnerability allows attackers to access internal network services by supplying loopback, link-local, or cloud metadata addresses to the visit_page tool. The tool only validates the URL protocol without filtering private or reserved IP ranges. Attackers can exploit this by using prompt injection to steer the LLM-controlled URL argument through the server's Playwright browser to internal endpoints, such as cloud instance metadata services. This can cause the server to return sensitive internal page content, including credentials, into the model context.
- Vendor
- mzxrai
- Product
- mcp-webresearch
- CVSS
- HIGH 8.3
- CISA KEV
- Not listed in stored evidence
- Original CVE published
- 2026-07-21
- Original CVE updated
- 2026-07-22
- Advisory published
- 2026-07-21
- Advisory updated
- 2026-07-22
Who should care
Users of the mcp-webresearch package, version 0.1.7, should be aware of this vulnerability and take immediate action to mitigate the risk. This includes updating to a patched version of the package and implementing additional security measures to protect against SSRF attacks.
Technical summary
The mcp-webresearch package, version 0.1.7, contains a server-side request forgery (SSRF) vulnerability. The visit_page tool does not properly filter internal IP addresses, allowing attackers to access internal network services. This can be exploited through prompt injection, which can lead to the disclosure of sensitive information, including credentials. Attackers can steer the LLM-controlled URL argument through the server's Playwright browser to internal endpoints such as cloud instance metadata services. Users should verify affected deployments, review official advisories, and plan updates or mitigations through change control. Compensating controls and monitoring should be reviewed for exposed systems.
Defensive priority
High
Recommended defensive actions
- Update to a patched version of the mcp-webresearch package
- Implement additional security measures to protect against SSRF attacks
- Monitor for suspicious activity and implement logging and alerting
- Conduct regular vulnerability assessments and penetration testing
- Review compensating controls for exposed systems while remediation is scheduled and verified
- Check relevant monitoring, detection, and logs for exposed assets that need extra review
- Track exceptions, retest remediated assets, and close the item only after evidence is documented
Evidence notes
The CVE record was published on 2026-07-21T21:16:54.287Z and was last modified on 2026-07-22T16:18:51.307Z. The NVD entry is currently in the 'Received' state. The vulnerability was reported by an unknown source and is tracked under CVE-2026-65056.
Official resources
AI-assisted PatchSiren debrief based on the supplied source corpus. The CVE record was published on 2026-07-21T21:16:54.287Z and has not been modified since then. The NVD entry is currently Received.